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University of Hong Kong
1.
Voskanyan, Albert.
Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures.
Degree: PhD, 2016, University of Hong Kong
URL: http://hdl.handle.net/10722/239979 
► Synthesis of pore and shape controlled nanostructures on a large scale with low costs and simplicity is a present challenge in nanotechnology. The solution combustion…
(more)
▼ Synthesis of pore and shape controlled
nanostructures on a large scale with low costs and simplicity is a
present challenge in nanotechnology. The solution combustion
synthesis (SCS) is an established energy and time efficient method
for mass-producing nanocrystalline metal oxides and metals. A main
uniqueness of this method is that the temperature required for
crystalline nanostructure formation is achieved through exothermic
reaction between precursors. There is, however, little
controllability in product structures. This thesis develops novel
synthetic methods based on solution combustion processing for
scalable synthesis of inorganic materials with controlled
nanostructures. An innovated method denoted as colloidal solution
combustion synthesis (CSCS) is developed to prepare uniform
mesoporous metal oxides with tunable porosity by combustion of a
colloidal solution. The tunability of CSCS synthesized oxides is
well illustrated by the control and correlation of surface area,
pore volume, and pore size to amount of colloid added as
demonstrated in the results for CeO2 and NiO. Colloids play a
significant role beyond that of a template. The addition of a
colloid limits combustion to take place in a confined and uniformly
distributed nanospace, leading to a highly uniform mesoporous
structure after template removal. Crystalline mesoporous CeO2 with
22 and 12 nm uniform pores, high specific surface areas (82 and 197
m2/g) and large pore volumes (0.6 and 0.37 ml/g) are successfully
synthesized by CSCS. Nickel oxide powder having 223 m2/g, 0.39 ml/g
pore volume, and uniform 22 nm mesopores is also prepared. Both
oxides demon-strated excellent catalytic activities for carbon
monoxide and soot oxidation.
Another method developed in this
thesis uses metal-organic framework (MOF) as a sacrificial template
in a combustion synthesis. It has been demonstrated that instead of
using external heating source to decompose the organic framework,
combustion reaction inside the framework can produce pure Cr2O3
octahedra with the octahedral shape of MOF retained.
A new
one-step method of producing dense metallic Pd films from aqueous
solution on a large scale via SCS is proposed. By using palladium
nitrate and glycine, mirror-bright dense Pd films with good
adhesion are deposited on different substrates at relatively low
temperature of 300 °C. Interestingly, a complex formed between
palladium nitrate and glycine is observed and confirmed by
characterization. The complex formation gives new insights about
the mechanism of the process. The Pd film deposited directly onto
glassy carbon electrode exhibited excellent electrocatalytic
activity for both alcohol oxidation and oxygen reduction reactions
in alkaline media.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy
Subjects/Keywords: Nanostructures
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APA (6th Edition):
Voskanyan, A. (2016). Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/239979
Chicago Manual of Style (16th Edition):
Voskanyan, Albert. “Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures.” 2016. Doctoral Dissertation, University of Hong Kong. Accessed February 22, 2020.
http://hdl.handle.net/10722/239979.
MLA Handbook (7th Edition):
Voskanyan, Albert. “Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures.” 2016. Web. 22 Feb 2020.
Vancouver:
Voskanyan A. Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures. [Internet] [Doctoral dissertation]. University of Hong Kong; 2016. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/10722/239979.
Council of Science Editors:
Voskanyan A. Advancing solution combustion synthesis for control and
tunability of inorganic nanostructures. [Doctoral Dissertation]. University of Hong Kong; 2016. Available from: http://hdl.handle.net/10722/239979
Anna University
2.
Dhinesh kumar R.
Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;.
Degree: Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications, 2015, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/34257
► Recently there has been great deal of interest in ABO3 perovskite based materials ABO3 A Y Tb and La BMn and Fe perovskite materials form…
(more)
▼ Recently there has been great deal of interest in
ABO3 perovskite based materials ABO3 A Y Tb and La BMn and Fe
perovskite materials form an interesting family showing a wide
variety of physical properties However these materials can be used
in sensors magnetic data storage nonvolatile memory transducers and
gate ferroelectrics in field effect transistors When ABO3 materials
were prepared as nanoparticles nanorods nanospheres and
nanocomposites with well controlled size and shape as well as size
distribution they exhibit improved properties compared to their
bulk form ABO3 type perovskite structure has attracted great
attention among the researchers due to its wide applications in
various catalytic activities as electrode material in solid oxide
fuel cells electronic and magnetic materials and as electrodes in
high temperature environments newlineIn this study YMnO3 nanorods
were successfully prepared by hydrothermal method The structural
magnetic and optical properties of YMnO3 nanorods have been studied
The XRD pattern confirmed that the prepared sample is phase pure
with hexagonal structure HRSEM HRTEM and AFM images revealed that
the sample contains uniform nanorods with average diameter of 100
nm and length in several micrometers MFM image shows magnetic
distribution in the rod newline newline
reference p132-142.
Advisors/Committee Members: Jayavel R.
Subjects/Keywords: Nanostructures
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APA (6th Edition):
R, D. k. (2015). Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/34257
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
R, Dhinesh kumar. “Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;.” 2015. Thesis, Anna University. Accessed February 22, 2020.
http://shodhganga.inflibnet.ac.in/handle/10603/34257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
R, Dhinesh kumar. “Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;.” 2015. Web. 22 Feb 2020.
Vancouver:
R Dk. Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 22].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
R Dk. Investigation on the synthesis and characterization of
ymno3 tbmno3 Nanostructures and lafeo3 Based nanocomposites for
Photocatalytic applications;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34257
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rutgers University
3.
Alzahrani, Nouf.
Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules.
Degree: MS, Chemistry, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/56995/
► Biological systems have evolved complex macromolecular nanostructures to carry out cellular functions with high specificity and efficiency, such as mitochondrial electron transport chains, polymerase and…
(more)
▼ Biological systems have evolved complex macromolecular
nanostructures to carry out cellular functions with high specificity and efficiency, such as mitochondrial electron transport chains, polymerase and transcription cofactors and light-harvesting antenna in photosynthesis. These organized
nanostructures are formed inside cells by spontaneous self-assembly of individual molecular components. In the past few decades, researchers have taken advantage of the self-assembly of nucleic acids to construct various 1D – 3D
nanostructures. Self-assembled DNA
nanostructures have an inherent advantage of generating programmable
nanostructures with controllable parameters of dimension, structural hierarchy and nanometer precision, which can be used for mediating drug release. In this thesis, we have studied single- or double-stranded DNA molecules for forming nanoparticles with minocycline (MH) in the presence of magnesium ions (bridging effect) and π-π stacking interaction. We evaluated multi-dimensional DNA
nanostructures (e.g. ssDNA, dsDNA, DNA origami) to load and release MH with sufficient dose during an interval of two weeks. The entrapment efficiency of MH and iii DNA was found to depend on the Mg2+ concentration, DNA length, and types of DNA (i.e. as a function of nitrogen bases). The molecule ssDNA with length > 11-nucleotide (nt) was found to form aggregates with MH in the presence of Mg2+. The titration of Mg2+ concentration showed that the maximum particle formation yield was reached at ~ 4 mM. ssDNA also showed higher dimensional aggregate formation yield than dsDNA, due to the flexible structure of ssDNA allowing more aggregation with MH and Mg2+. In collaboration with Drexel University, we have applied DNA-Mg2+-MH particles to agarose gel encapsulation and release for maintaining the activity of MH during a long period release. This DNA-mediated MH release could be potentially used in the future spinal cord therapy for localized delivery of MH at the injury site.
Advisors/Committee Members: Fu, Jinglin (chair).
Subjects/Keywords: Nanostructures
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APA (6th Edition):
Alzahrani, N. (2018). Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/56995/
Chicago Manual of Style (16th Edition):
Alzahrani, Nouf. “Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules.” 2018. Masters Thesis, Rutgers University. Accessed February 22, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/56995/.
MLA Handbook (7th Edition):
Alzahrani, Nouf. “Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules.” 2018. Web. 22 Feb 2020.
Vancouver:
Alzahrani N. Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules. [Internet] [Masters thesis]. Rutgers University; 2018. [cited 2020 Feb 22].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56995/.
Council of Science Editors:
Alzahrani N. Co-aggregation studies of nucleic acid nanostructures with tetracycline molcules. [Masters Thesis]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/56995/
University of Hong Kong
4.
Cai, Jingxuan.
Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint.
Degree: PhD, 2016, University of Hong Kong
URL: http://hdl.handle.net/10722/238873
► The research work presented in this thesis focuses on three topics: (1) the development of a novel lithographic approach to fabricate three-dimensional (3-D) nanostructures using…
(more)
▼ The research work presented in this thesis focuses
on three topics: (1) the development of a novel lithographic
approach to fabricate three-dimensional (3-D) nanostructures using
focused helium ions based on deepened understanding of 3-D energy
dissipation of helium ions; (2) the investigation of developing
hybrid approaches using interference lithography, electrodeposition
and imprint transfer for fabricating large-area regular
nanostructures and demonstrating their applications in plasmonic
sensing; (3) the studies on nanoimprint lithography (NIL) on
unconventional substrates and durability of imprint patterns in
sub-10 nm UV NIL. Based on these topics, the thesis is divided into
three parts.
The first part presents the numerical and
experimental investigations of helium ion beam lithography and the
development of 3-D helium ion beam lithography. First, a model to
simulate the volumetric energy dissipation of helium ions in
materials is proposed and validated with experimental results. The
model is based on a Monte Carlo method and has the capability to be
tailored for various of resist materials by changing the parameters
of resist. Moreover, by comparing the numerical and experimental
results, critical energy density for sufficiently crosslinking
hydrogen silsesquioxane (HSQ) by helium ion beam exposure is
investigated. Second, a facile and controllable 3-D nanofabrication
method relying on focused helium ion beam lithography is developed
based on the model. Embedded nanochannels inside crosslinked HSQ
structures, and free-standing nanosized grids have been fabricated
as demonstrations of the method.
The second part describes a
novel approach to fabricate large-area nanostructures on flexible
plastic films using lithography, electrodeposition and imprint
transfer (LEIT). A new type of plasmonic refractive index sensor
featuring square gold-nanocheckerboard-embedded in a flexible
plastic film is designed and fabricated. An excellent sensitivity
of 435 nm RIU^(-1) has been demonstrated on the prototype sensor
within the visible range, which is among the highest of all
reported LSPR sensors in the visible range. Besides, because of the
embedded nature of the gold nanostructures, excellent mechanical
stability against repeated bending and peeling is
observed.
published_or_final_version
Mechanical Engineering
Doctoral
Doctor of Philosophy
Subjects/Keywords: Nanostructures; Microlithography
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APA (6th Edition):
Cai, J. (2016). Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/238873
Chicago Manual of Style (16th Edition):
Cai, Jingxuan. “Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint.” 2016. Doctoral Dissertation, University of Hong Kong. Accessed February 22, 2020.
http://hdl.handle.net/10722/238873.
MLA Handbook (7th Edition):
Cai, Jingxuan. “Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint.” 2016. Web. 22 Feb 2020.
Vancouver:
Cai J. Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint. [Internet] [Doctoral dissertation]. University of Hong Kong; 2016. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/10722/238873.
Council of Science Editors:
Cai J. Unconventional lithographic fabrication of nanostructures
using charged particles, laser interference and
nanoimprint. [Doctoral Dissertation]. University of Hong Kong; 2016. Available from: http://hdl.handle.net/10722/238873
University of Hong Kong
5.
陳健; Chen, Jian.
Investigation of magnetization dynamics in
nanostructures.
Degree: PhD, 2015, University of Hong Kong
URL: Chen,
J.
[陳健].
(2015).
Investigation
of
magnetization
dynamics
in
nanostructures.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b5699917
;
http://hdl.handle.net/10722/223009
► This thesis investigated magnetization dynamics in nanostructures. Magnetization can be considered as an ensemble of large number of spins. In a macrospin model, magnetization is…
(more)
▼ This thesis investigated magnetization dynamics in
nanostructures. Magnetization can be considered as an ensemble of
large number of spins. In a macrospin model, magnetization is
assumed to be spatially uniform so that it can be treated as a
classical vector. Typically a Landau-Lifshitz-Gilbert (LLG)
equation is used to described the dynamics of magnetization. The
LLG equation is usually derived phenomenologically and the
parameters of the equation needs to be tuned in order to comply
with the experiments. Study of the magnetization dynamics from
first principles is still insufficient.
In this thesis, by using
the time dependent Green’s function theory, magnetization dynamics
is studied in two systems: quantum dot with normal leads, and
quantum dot with ferromagnetic leads. Expressions of intrinsic
Gilbert damping tensor as well as fluctuating torque are derived in
terms of Green’s function. Our expression of Gilbert damping tensor
resembles the one derived from scattering matrix theory in the
limit of low temperatures and wide band approximation, but is
suitable for general case. Spin continuity equation of the system
is also discussed, which shows how spin current is included in the
equation of magnetization dynamics.
Recently spin torque effect
due to the presence of Rashba spin-orbit coupling (RSOC) opens the
possibility of a new mechanism to manipulate magnetization.
Currently most of the studies focused on infinite two dimensional
electron gas (2DEG) system where current is driven by an external
electric field. A semiclassical Boltzmann (SCB) transport equation
was used and the nonequilibrium spin density was found to be
linearly proportional to the charge current density. However,
systematic investigation of such effect in a mesoscopic system
beyond the semiclassical Boltzmann description has not been
reported. It is purpose of this thesis to fill this gap.
In this
thesis, magnetization dynamics is investigated in a finite 2DEG
system where current is driven by bias instead of electric field.
Rashba spin orbit coupling (RSOC) in 2D ferromagnetic materials
generates spin polarization in 2DEG, thus a spin torque is induced.
Magnetization dynamics of the ferromagnetic 2DEG is investigated in
a tight binding model, which shows similar magnetic field assist
switching effect as in the experiment. Our formalism is feasible
for the first principle calculation of magnetization
dynamics.
published_or_final_version
Physics
Doctoral
Doctor of Philosophy
Subjects/Keywords: Nanostructures; Electromagnetism
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APA (6th Edition):
陳健; Chen, J. (2015). Investigation of magnetization dynamics in
nanostructures. (Doctoral Dissertation). University of Hong Kong. Retrieved from Chen, J. [陳健]. (2015). Investigation of magnetization dynamics in nanostructures. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5699917 ; http://hdl.handle.net/10722/223009
Chicago Manual of Style (16th Edition):
陳健; Chen, Jian. “Investigation of magnetization dynamics in
nanostructures.” 2015. Doctoral Dissertation, University of Hong Kong. Accessed February 22, 2020.
Chen, J. [陳健]. (2015). Investigation of magnetization dynamics in nanostructures. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5699917 ; http://hdl.handle.net/10722/223009.
MLA Handbook (7th Edition):
陳健; Chen, Jian. “Investigation of magnetization dynamics in
nanostructures.” 2015. Web. 22 Feb 2020.
Vancouver:
陳健; Chen J. Investigation of magnetization dynamics in
nanostructures. [Internet] [Doctoral dissertation]. University of Hong Kong; 2015. [cited 2020 Feb 22].
Available from: Chen, J. [陳健]. (2015). Investigation of magnetization dynamics in nanostructures. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5699917 ; http://hdl.handle.net/10722/223009.
Council of Science Editors:
陳健; Chen J. Investigation of magnetization dynamics in
nanostructures. [Doctoral Dissertation]. University of Hong Kong; 2015. Available from: Chen, J. [陳健]. (2015). Investigation of magnetization dynamics in nanostructures. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5699917 ; http://hdl.handle.net/10722/223009
Addis Ababa University
6.
SOLOMON, HAILEMARIAM.
MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1219
► Bulk silicon (Si) and germanium (Ge) have an indirect band gap transitions however when they are miniaturized to nanometer scale, the energy gap between the…
(more)
▼ Bulk silicon (Si) and germanium (Ge) have an indirect band gap transitions however when they are
miniaturized to nanometer scale, the energy gap between the highest occupied molecular orbital
(HOMO) and the lowest unoccupied molecular orbital (LUMO) increases, and hence the transition
changes to direct due to confinement. The HOMO-LUMO gap determines the excitation of electrons
so that the
nanostructures will emit light. In this work,quantum confinement effects for Si and
Ge,some methods to calculate band structures and formation mechanisms of photoluminescence
from Si and Ge
nanostructures are presented. We presented the parameters that influence the
photoluminescence intensity of Si and Ge
nanostructures. Finally we developed a model that could
explain experimental results of Si nanocrystal photoluminescence versus size and wavelength by
using Matlab program.
Advisors/Committee Members: Dr. Tesgera Badassa (advisor).
Subjects/Keywords: PHOTOLUMINESCIENCE;
NANOSTRUCTURES
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APA (6th Edition):
SOLOMON, H. (2012). MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
(Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
SOLOMON, HAILEMARIAM. “MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
” 2012. Thesis, Addis Ababa University. Accessed February 22, 2020.
http://etd.aau.edu.et/dspace/handle/123456789/1219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
SOLOMON, HAILEMARIAM. “MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
” 2012. Web. 22 Feb 2020.
Vancouver:
SOLOMON H. MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
[Internet] [Thesis]. Addis Ababa University; 2012. [cited 2020 Feb 22].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1219.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
SOLOMON H. MECHANISMS FOR FORMATIONS OF PHOTOLUMINESCIENCE FROM SILICON AND GERMANIUM NANOSTRUCTURES AND FORMULATING MODELS.
[Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1219
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
7.
Sioma, Debela.
RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1222
► Nanosilicon (nanocrystal and porous) research is gaining tremendous attention in recent years due to the light emitting properties of the material. Improving efficiencies in radiative…
(more)
▼ Nanosilicon (nanocrystal and porous) research is gaining tremendous attention in recent
years due to the light emitting properties of the material. Improving efficiencies in radiative
recombination and light extraction of this material enhances potential applications as
microelectronic and optoelectronic devices with new operational capabilities. In this work
we investigate the influence of quantum confinement and excitation laser pump flux on
the optical parameters of silicon nanocrystal. Our work presents a new approach for the
photoluminescence mechanism of silicon nanocrystal by using phenomenological formulations
that explain the size and laser pump flux dependence of photoluminescence intensity,
radiative lifetime and internal quantum efficiency. To investigate the mechanism of the
photoluminescence we perform computer simulation using fortran programming. These
results show that, miniaturizing the size and increasing laser pump flux strongly alters
photoluminescence intensity, radiative lifetime and internal quantum efficiency of silicon
nanocrystal. Our results have in well agreement with many other theoretical and experimental
findings. Our model confirms photoluminescence emission intensity and internal
quantum efficiency enhance due to quantum confinement and we can tune the emission
spectral range across the visible by using proper sized silicon nanocrystal
Advisors/Committee Members: Dr. Sib Krishna Ghoshal (advisor).
Subjects/Keywords: SILICON NANOSTRUCTURES
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APA (6th Edition):
Sioma, D. (2012). RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1222
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sioma, Debela. “RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
.” 2012. Thesis, Addis Ababa University. Accessed February 22, 2020.
http://etd.aau.edu.et/dspace/handle/123456789/1222.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sioma, Debela. “RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
.” 2012. Web. 22 Feb 2020.
Vancouver:
Sioma D. RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2020 Feb 22].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1222.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sioma D. RADIATIVE LIFETIME AND INTERNAL QUANTUM EFFICIENCY OF SMALL SCALE SILICON NANOSTRUCTURES
. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1222
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Addis Ababa University
8.
Mekonnen, Abebe.
OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1352
► In this thesis we theoretically investigated static and dynamic correlation effects in semiconductor nanostructures. Structural inhomogneity and confinement quantization effects make this class of materials…
(more)
▼ In this thesis we theoretically investigated static and dynamic correlation effects in semiconductor
nanostructures. Structural inhomogneity and confinement quantization effects make this class of materials exhibit exotic properties under different experimental conditions. Time dependent coupling of the local states under time dependent perturbations and the fluctuation of the proximity couplings in the length scale of tunneling give rise to dynamical correlations that put their signature in the optical and transport properties. Based on the Orbital Free Local Density Approximation (OF-LDA), the exchange and correlation contribution to the orbital energy and the size dependent nature of the threshold for optical absorption are studied. The effects of dynamical correlations between the states in a single nanostructure and the effects of dynamical correlations between the states in proximity coupled configurations are investigated with the Non Equilibrium Green Function Formalism (NEGF) as the theoretical frame work.
The theoretical formulation of the non equilibrium dynamical analysis is used to describe the coherent regime optical and transport phenomena in semiconductor
nanostructures. The results demonstrate that the presence of strong coupling between electronic states in semiconductor
nanostructures leads to the formation of d states. First we have shown the emergence of collapse and revival phenomenon during the coherent regime absorption in a single dot. We presented qualitative and quantitative description of the Rabi oscillation. The dependence on the mean photon number and on the strength of the couplings between electronic states is demonstrated. We found that similar phenomenon in a wide range of many body system could be satisfactorily described assuming entanglement of the lower levels. Secondly, we theoretically investigated correlation effects in tunnel coupled
nanostructures. The quantum blockade phenomenon in wide experimental samples is
v
explored. The appearance of double dot structures as a time shared entangler is predicted. It is also found that the presence of a transparent boundary between quantum dots lead to the formation of local entangled states that are too difficult for experimental demonstration. Lastly the possible technological value of a double dot –in series configuration is presented. Its operation as electron-spin polarization is discussed and its potential for application as IR detector is proposed.
Advisors/Committee Members: Prof. P. Singh (advisor).
Subjects/Keywords: NANOSTRUCTURES;
SEMICONDUCTOR
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APA (6th Edition):
Mekonnen, A. (2013). OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mekonnen, Abebe. “OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
.” 2013. Thesis, Addis Ababa University. Accessed February 22, 2020.
http://etd.aau.edu.et/dspace/handle/123456789/1352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mekonnen, Abebe. “OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
.” 2013. Web. 22 Feb 2020.
Vancouver:
Mekonnen A. OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2020 Feb 22].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1352.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mekonnen A. OPTICAL AND ELECTRONIC CORRELATION EFFECTS IN SEMICONDUCTOR NANOSTRUCTURES WITH EMPHASIS ON SILICON NANOSTRUCTURE
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1352
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Victoria
9.
Addison, Christopher James.
Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures.
Degree: Dept. of Chemistry, 2008, University of Victoria
URL: http://hdl.handle.net/1828/800
► 3-Dimensional nanostructures were constructed through the alternate immersion of a derivatized glass slide in solutions of propanedithiol and gold nanoparticles. The size and shape of…
(more)
▼ 3-Dimensional
nanostructures were constructed through the alternate immersion of a
derivatized glass slide in solutions of propanedithiol and gold nanoparticles. The size and
shape of the surface features could be controlled based on the number of nanoparticle
depositions. Characterization of the substrates was performed using W-Vis
spectroscopy and atomic force microscopy. The multilayer nanoparticle substrates were
examined for their suitability in surface-enhanced Raman scattering (SERS) by obtaining
the SERS spectrum of oxazine-720 on the substrates. A dramatic increase in the SERS
signal is noted with increasing nanoparticle layers and reaches a maximum for 11
nanoparticle-layer depositions. The enhancement is attributed to the underlying surface
morphology: Surface features on the order of 40 nm in size yield the greatest SERS
enhancement due to surface plasmon (SP) excitation.
The non-linear optical properties of colloidal
nanostructures were examined using second
harmonic generation (SHG). A pronounced second harmonic emission was noted for 13
nanoparticle layers and was attributed to SP excitation to yield surface-enhanced SHG.
The self-assembly of gold nanorods to form 3-dimensional
nanostructures was examined.
While the self-assembly was not successful, the aggregated gold nanorods exhibited a
large SERS enhancement. This suggests that the incorporation of gold nanorods into
SERS substrates is a viable avenue for future research.
Advisors/Committee Members: Brolo, Alexandre Guimaraes (supervisor).
Subjects/Keywords: Nanostructures
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APA (6th Edition):
Addison, C. J. (2008). Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures. (Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/800
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Addison, Christopher James. “Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures.” 2008. Thesis, University of Victoria. Accessed February 22, 2020.
http://hdl.handle.net/1828/800.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Addison, Christopher James. “Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures.” 2008. Web. 22 Feb 2020.
Vancouver:
Addison CJ. Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures. [Internet] [Thesis]. University of Victoria; 2008. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/1828/800.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Addison CJ. Fabrication, characterization and optical properties of three-dimensional colloidal gold nanostructures. [Thesis]. University of Victoria; 2008. Available from: http://hdl.handle.net/1828/800
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Montana State University
10.
Haq, Mohammad Tahdiul.
Fabrication of subwavelength scale optical nanostructures.
Degree: College of Engineering, 2011, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/1426
► Sub-wavelength scale optical nanostructures can be engineered for specific applications in multiple disciplines. This thesis describes the fabrication of three such optical nanostructures and the…
(more)
▼ Sub-wavelength scale optical
nanostructures can be engineered for specific applications in multiple disciplines. This thesis describes the fabrication of three such optical
nanostructures and the process development and optimization performed to improve the nanofabrication capabilities of our research group. Along with our collaborators we have fabricated a subwavelength-scale solid immersion lens. The fabrication process of cylinders of precise dimensions in resist is discussed as well as the measurements and characterization of the final fabricated device. The second device is a1-D antireflective rectangular grating in silicon with 800nm period, which is fabricated, simulated and characterized. The lithography process is calibrated for gratings with 250-600nm line widths and the etching process is optimized to obtain depths precise to within + or - 10nm. The final device is a mid-infrared polarizing beam splitter. The fabrication of this device is not yet complete, but the correct grating structure in silicon is fabricated and some process improvements for gold deposition have been realized.
Advisors/Committee Members: Chairperson, Graduate Committee: Wataru Nakagawa. (advisor).
Subjects/Keywords: Nanostructures.; Microfabrication.
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CSE |
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Manager
APA (6th Edition):
Haq, M. T. (2011). Fabrication of subwavelength scale optical nanostructures. (Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/1426
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Haq, Mohammad Tahdiul. “Fabrication of subwavelength scale optical nanostructures.” 2011. Thesis, Montana State University. Accessed February 22, 2020.
https://scholarworks.montana.edu/xmlui/handle/1/1426.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Haq, Mohammad Tahdiul. “Fabrication of subwavelength scale optical nanostructures.” 2011. Web. 22 Feb 2020.
Vancouver:
Haq MT. Fabrication of subwavelength scale optical nanostructures. [Internet] [Thesis]. Montana State University; 2011. [cited 2020 Feb 22].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/1426.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Haq MT. Fabrication of subwavelength scale optical nanostructures. [Thesis]. Montana State University; 2011. Available from: https://scholarworks.montana.edu/xmlui/handle/1/1426
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Loiselet, Ophelliam.
Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics.
Degree: Docteur es, Matériaux. Optique, 2018, Lyon
URL: http://www.theses.fr/2018LYSE1033
► Depuis plusieurs années les physiciens de la matière condensée s'intéressent aux propriétés optiques et magnétiques des nanoparticules métalliques. Deux propriétés restent largement étudiées : les…
(more)
▼ Depuis plusieurs années les physiciens de la matière condensée s'intéressent aux propriétés optiques et magnétiques des nanoparticules métalliques. Deux propriétés restent largement étudiées : les résonances plasmon localisées et l'anisotropie magnétique à l'échelle nanométrique. Ces deux effets résultant de propriétés électroniques bien différentes sont habituellement rencontrés dans des nanosystèmes distincts. Depuis les années 2000 des études ont montré qu'il était possible de bénéficier de ces deux caractéristiques dans un seul et même système nanométrique. Dans cette thèse, nous nous intéresserons à la combinaison des propriétés magnétiques et plasmoniques dans des systèmes de taille inférieure à la dizaine de nanomètres: les agrégats bimétalliques de CoAg et de CoAu synthétisés par voie physique sous ultravide encapsulés en matrice (alumine et carbone). Nous nous intéresserons à la structure de ces agrégats bimétalliques de différentes stœchiométries et à l'effet de leur environnement à travers l'étude de leurs propriétés optiques, magnétiques et électroniques (par spectroscopie électronique par perte d'énergie (EELS) sur des particules individuelles). Nous montrerons l'effet de la matrice, carbone ou alumine, sur la structure des agrégats ainsi que sur leurs propriétés magnétiques (moment par agrégat, anisotropie). En optique nous verrons également l'importance de la stœchiométrie entre métal noble et cobalt sur les phénomènes d'amortissement et de décalage de résonance plasmon. Enfin nous montrerons la répartition spatiale des plasmons de surface sur des particules unique par des mesures de STEM-EELS
For several years condensed matter physicists have been interested in the optical and magnetic properties of metallic nanoparticles. Two properties remain largely studied: localized plasmon resonances and magnetic anisotropy at the nanoscale. These two effects resulting from very different electronic properties which are usually encountered in separate nanosystems. Since the 2000's, studies have shown that it is possible to benefit from these two characteristics in a single nanometric system. In this thesis, we will focus on the combination of magnetic and plasmonic properties in systems of size less than ten nanometers: bimetallic clusters of CoAg and CoAu synthesized physically under ultrahigh vacuum and embedded in a matrix (alumina and carbon). We will study the structure of these bimetallic clusters of different stoichiometries and the effect of their environment through the investigation of their optical, magnetic and electronic properties (by electron energy loss spectroscopy (EELS) on individual particles ). We will show the effect of the matrix, carbon or alumina, on the structure of the clusters as well as on their magnetic properties (moment by cluster, anisotropy). In optics we will also see the importance of stoichiometry between noble metal and cobalt on the phenomena of the damping and shifting of the plasmon resonance. Finally we will show the spatial distribution of surface plasmons on single…
Advisors/Committee Members: Tournus, Florent (thesis director), Bellessa, Joël (thesis director).
Subjects/Keywords: Plasmonique; Magnétisme; Nanostructures; Plasmonics; Magnetism; Nanostructures; 532
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APA ·
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CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Loiselet, O. (2018). Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics. (Doctoral Dissertation). Lyon. Retrieved from http://www.theses.fr/2018LYSE1033
Chicago Manual of Style (16th Edition):
Loiselet, Ophelliam. “Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics.” 2018. Doctoral Dissertation, Lyon. Accessed February 22, 2020.
http://www.theses.fr/2018LYSE1033.
MLA Handbook (7th Edition):
Loiselet, Ophelliam. “Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics.” 2018. Web. 22 Feb 2020.
Vancouver:
Loiselet O. Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics. [Internet] [Doctoral dissertation]. Lyon; 2018. [cited 2020 Feb 22].
Available from: http://www.theses.fr/2018LYSE1033.
Council of Science Editors:
Loiselet O. Synthèse et caractérisation d’agrégats bimétalliques pour la magnéto-plasmonique : Synthesis and characterisation of bimetallic clusters for magneto-plasmonics. [Doctoral Dissertation]. Lyon; 2018. Available from: http://www.theses.fr/2018LYSE1033
University of Utah
12.
Zhang, Yu.
Computational study on semiconductor self-assembly and mechanics of nanomembrane.
Degree: PhD, Materials Science & Engineering, 2011, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3517/rec/531
► The main objective of this dissertation is to contribute to the understanding ofnanomechanics in bilayer Si/Ge thin films and graphene. A set of multiscale modelingand…
(more)
▼ The main objective of this dissertation is to contribute to the understanding ofnanomechanics in bilayer Si/Ge thin films and graphene. A set of multiscale modelingand simulations, using finite element analysis (FEA), material point method (MPM) andmolecular dynamics (MD) method, have been performed to investigate structural,mechanical and growth properties of several different classes of low-dimensionalnanostructures. By using FEA, we find that epitaxially grown Ge quantum dots on bothsides of a Si nanoribbon adopt an anticorrelated configuration, in agreement withexperiment. In addition, the Ge dots, acting as nanostressors, create a periodic strain fieldin the Si nanoribbon, which leads to the formation of a new class of single-element strainsuperlattice as predicted by first-principles electronic structure calculations performed bymy collaborators. Also using FEA, we have investigated the morphological instability ofstrained thin film grown on curved substrates, revealing the physical origin of an antiphasemorphology.Another accomplishment presented in this dissertation is the understanding ofexperimentally observed wiggling phenomenon in SiGe nanoribbons released on an SOIsubstrate. We build a continuum mechanics model to describe the buckling of the strainedSiGe nanoribbon and its interaction with the substrate. Our theoretical model providesnew insights to understanding the existing experimental results as well as useful guidancefor future experiments, with broad implications in the fabrication of stretchableelectronics by strain induced self-assembly.We also utilized solid mechanics analyses and MD simulations to study the maximumasymmetry in strain induced mechanical instability in graphene, a two-dimensional (2D)crystal with the thinnest possible thickness of only one atomic layer. The continuummechanics theory shows perfect agreement with the atomistic MD simulation, even downto the scale of a few nanometers.
Subjects/Keywords: Nanomechanics; Nanostructures; Nanomembrane
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APA (6th Edition):
Zhang, Y. (2011). Computational study on semiconductor self-assembly and mechanics of nanomembrane. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3517/rec/531
Chicago Manual of Style (16th Edition):
Zhang, Yu. “Computational study on semiconductor self-assembly and mechanics of nanomembrane.” 2011. Doctoral Dissertation, University of Utah. Accessed February 22, 2020.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3517/rec/531.
MLA Handbook (7th Edition):
Zhang, Yu. “Computational study on semiconductor self-assembly and mechanics of nanomembrane.” 2011. Web. 22 Feb 2020.
Vancouver:
Zhang Y. Computational study on semiconductor self-assembly and mechanics of nanomembrane. [Internet] [Doctoral dissertation]. University of Utah; 2011. [cited 2020 Feb 22].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3517/rec/531.
Council of Science Editors:
Zhang Y. Computational study on semiconductor self-assembly and mechanics of nanomembrane. [Doctoral Dissertation]. University of Utah; 2011. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3517/rec/531
University of Alberta
13.
Wan, Qian.
Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers.
Degree: MS, Department of Electrical and Computer
Engineering, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/jw827c20d
► All ultrasound devices/sensors use piezoelectric transducers to generate/receive ultrasound. These transducers are made of Pb (Zr0.53Ti0.47) O3 (PZT) materials. In this article, we report a…
(more)
▼ All ultrasound devices/sensors use piezoelectric
transducers to generate/receive ultrasound. These transducers are
made of Pb (Zr0.53Ti0.47) O3 (PZT) materials. In this article, we
report a new way of fabricating PZT material with interesting
nanorod and nanohexagon shapes. The PZT nanohexagons with typical
diameters and bounding lengths within the nanometer range were
synthesized by sintering a mixture of PZT nanocrystals, Tween 20
and sodium chloride, in which the PZT nanocrystals were made by a
sol-gel method. The PZT nanorods were also synthesized by sintering
a mixture of PZT nanocrystals, Triton and sodium chloride. After
annealing at 800°C for three hours, PZT nanorods and PZT
nanohexagons formed and exhibited a single-crystalline
nanostructure, confirmed by high resolution transmission electronic
microscopy (HRTEM). X-ray diffraction (XRD) and Raman Spectra
studies demonstrated their crystal structures and composition,
scanning electron microscopy (SEM) and transmission electron
microscopy (TEM) were used to image their
morphologies.
Subjects/Keywords: transducers; PZT; nanostructures
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APA ·
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APA (6th Edition):
Wan, Q. (2012). Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/jw827c20d
Chicago Manual of Style (16th Edition):
Wan, Qian. “Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers.” 2012. Masters Thesis, University of Alberta. Accessed February 22, 2020.
https://era.library.ualberta.ca/files/jw827c20d.
MLA Handbook (7th Edition):
Wan, Qian. “Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers.” 2012. Web. 22 Feb 2020.
Vancouver:
Wan Q. Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2020 Feb 22].
Available from: https://era.library.ualberta.ca/files/jw827c20d.
Council of Science Editors:
Wan Q. Fabrication and characterization of PZT nanorods and
nanohexagons with applications in piezoelectric transducers. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/jw827c20d
University of Hong Kong
14.
Tian, Heng.
Application of hierarchical equations of motion to time
dependent quantum transport.
Degree: PhD, 2012, University of Hong Kong
URL: Tian,
H.
[田恒].
(2012).
Application
of
hierarchical
equations
of
motion
to
time
dependent
quantum
transport.
(Thesis).
University
of
Hong
Kong,
Pokfulam,
Hong
Kong
SAR.
Retrieved
from
http://dx.doi.org/10.5353/th_b4786944
;
http://dx.doi.org/10.5353/th_b4786944
;
http://hdl.handle.net/10722/183325
► Within the exact framework established recently, which is a successful marriage between the time dependent density functional theory for open electronic system and quantum dissipation…
(more)
▼ Within the exact framework established recently,
which is a successful marriage between the time dependent density
functional theory for open electronic system and quantum
dissipation theory formulated in the hierarchical equations of
motion, an entirely new scheme is proposed in this thesis to
simulate the time-dependent quantum transport in nano-devices at
both zero and finite temperature equally without relying on the
pole structure of the Fermi distribution function. Neither does it
depend on any non-unique parametrization of the line-width matrix,
hence, this new practical approach can be integrated with the first
principles simulations seamlessly. Beyond the exact framework, a
reliable method which works under the Wide- Band-Limit
approximation at zero temperature is also developed. At the price
of loss of some non-Markovian memory effects on the dynamics, a set
of equations of motion which terminates at the first tier instead
of the second tier is obtained. Benefiting from the latest
advancement of numerical analysis, a hybrid fourth-order
Runge-Kutta algorithm is proposed to solve this set of equations of
motion which comprises stiff ones. Based on this result, an
alternative scheme is considered to deal with the same
approximation at finite temperature. As an illustration of these
new approaches, the transient current of the one dimensional
tight-binding periodical chain with and without a single impurity,
driven by some time alternating and/or static bias voltages, are
investigated. The influence of temperature and switch-on rate of
bias voltage is exemplified. Particularly, in the one dimensional
tight-binding chain with a single impurity which breaks its perfect
periodicity, an asymmetry between the left and right transient
current is found. Comparison between the results under the
Wide-Band-Limit approximation and those with the exact description
is carried out.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy
Subjects/Keywords: Nanostructures.; Transport theory.
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APA ·
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Manager
APA (6th Edition):
Tian, H. (2012). Application of hierarchical equations of motion to time
dependent quantum transport. (Doctoral Dissertation). University of Hong Kong. Retrieved from Tian, H. [田恒]. (2012). Application of hierarchical equations of motion to time dependent quantum transport. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786944 ; http://dx.doi.org/10.5353/th_b4786944 ; http://hdl.handle.net/10722/183325
Chicago Manual of Style (16th Edition):
Tian, Heng. “Application of hierarchical equations of motion to time
dependent quantum transport.” 2012. Doctoral Dissertation, University of Hong Kong. Accessed February 22, 2020.
Tian, H. [田恒]. (2012). Application of hierarchical equations of motion to time dependent quantum transport. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786944 ; http://dx.doi.org/10.5353/th_b4786944 ; http://hdl.handle.net/10722/183325.
MLA Handbook (7th Edition):
Tian, Heng. “Application of hierarchical equations of motion to time
dependent quantum transport.” 2012. Web. 22 Feb 2020.
Vancouver:
Tian H. Application of hierarchical equations of motion to time
dependent quantum transport. [Internet] [Doctoral dissertation]. University of Hong Kong; 2012. [cited 2020 Feb 22].
Available from: Tian, H. [田恒]. (2012). Application of hierarchical equations of motion to time dependent quantum transport. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786944 ; http://dx.doi.org/10.5353/th_b4786944 ; http://hdl.handle.net/10722/183325.
Council of Science Editors:
Tian H. Application of hierarchical equations of motion to time
dependent quantum transport. [Doctoral Dissertation]. University of Hong Kong; 2012. Available from: Tian, H. [田恒]. (2012). Application of hierarchical equations of motion to time dependent quantum transport. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786944 ; http://dx.doi.org/10.5353/th_b4786944 ; http://hdl.handle.net/10722/183325
15.
Thamizselvi R.
Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;.
Degree: Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/30461
► Nanomaterials have gained great interest due to their importance in newlinebasic research and potential technological applications The properties of nano newlinestructured materials are determined by…
(more)
▼ Nanomaterials have gained great interest due to
their importance in newlinebasic research and potential
technological applications The properties of nano newlinestructured
materials are determined by a set of physical parameters that
newlineinclude size shape composition crystallinity and
microstructure They can newlinein principle be tailored and fine
tuned by controlling any one of these newlineparameters This thesis
focuses a systematic investigation on morphology newlinetuned
synthesis and characterization on Mn II Ni II doped and undoped
newlineZnS nanostructures by varying the reaction conditions
newline newline
reference p151-170.
Advisors/Committee Members: Senthilkumaar S.
Subjects/Keywords: Nanomaterials; ZNS nanostructures
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APA (6th Edition):
R, T. (2014). Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/30461
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
R, Thamizselvi. “Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;.” 2014. Thesis, Anna University. Accessed February 22, 2020.
http://shodhganga.inflibnet.ac.in/handle/10603/30461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
R, Thamizselvi. “Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;.” 2014. Web. 22 Feb 2020.
Vancouver:
R T. Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;. [Internet] [Thesis]. Anna University; 2014. [cited 2020 Feb 22].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/30461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
R T. Systematic investigation on MN ii and Ni ii doped ZNS
nanostructures;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/30461
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
16.
Seo, Sujin.
Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing.
Degree: PhD, Materials Science & Engr, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/90937
► Increasing demand for early disease diagnostic techniques has attracted huge interest in plasmon-based optical sensors, which can detect small concentrations of chemical and bio-analytes that…
(more)
▼ Increasing demand for early disease diagnostic techniques has attracted huge interest in plasmon-based optical sensors, which can detect small concentrations of chemical and bio-analytes that are not detectable by the conventional analytic optical tools. Advances in nanofabrication techniques have driven in-depth understanding of plasmons, which result from the interactions between nano-materials and the electromagnetic fields. Precisely designing and controlling unique optical properties of plasmons have shown better sensing limits than the conventional ones by amplifying optical signals as well as detecting sensitive plasmon resonance shift upon dielectric property change on the sensing surface.
In this dissertation, a series of experiments are undertaken using a colorimetric plasmonic nanocup array substrate with a single extraordinary optical transmission peak in the visible light range. Sensitive colorimetric sensing is demonstrated by detecting transmission peak shift upon the molecular adsorption or the dielectric property change on the surface. The surface modification of the plasmonic substrate using plasmonic metallic NPs is attempted in order to maximize the plasmonic sensitivity to the refractive index change through heterogeneous plasmon coupling. The plasmon coupling between the plasmons of NPs and nanostructure results in strong localized electric field and denser hot-spot formation; hence, the sensitivity is enhanced. Sensitive detections of specific bioanalytes that undergo antigen-antibody binding as well as bulk refractive index change are detected through a plasmonic dark mode shift, resulted from the heterogeneous plasmon coupling.
Optical near-field interactions among plasmons, fluorophores, chromophores, and molecules are studied in order to amplify weak fluorescence, absorbance, and Raman signals from a small number of target molecules. Strong scattering field and large scattering cross-section at the plasmon resonance wavelength are the main factors for amplifying fluorescence, absorbance, and Raman scattering. Tuning plasmon resonance to target molecular optical characteristic wavelengths is critical in each application. The amplification of fluorescence is achieved by matching the plasmon resonance with the fluorescence emission band. The absorbance from chromophores, which are involved in conventional immunoassays, is enhanced by matching the chromophores’ absorbance peak with the plasmon resonance wavelength. The improved surface enhanced Raman scattering is accomplished by tuning the plasmon resonance to be close to the laser excitation wavelength. Understanding the signal amplification mechanisms from these results achieves two orders of magnitude lower limit-of-detection as well as improved sensitivity and signal-to-noise ratio. The colorimetric sensor, which is capable of enhancing fluorescence, absorbance and Raman signals from the nearby molecules, provides a versatile multifunctional sensing platform for chemical, biomedical, and environmental monitoring.
Advisors/Committee Members: Liu, Gang Logan (advisor), Shim, Moonsub (Committee Chair), Braun, Paul V. (committee member), Kilian, Kristopher A. (committee member).
Subjects/Keywords: Plasmons; Nanostructures; Colorimetry
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APA (6th Edition):
Seo, S. (2016). Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/90937
Chicago Manual of Style (16th Edition):
Seo, Sujin. “Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing.” 2016. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed February 22, 2020.
http://hdl.handle.net/2142/90937.
MLA Handbook (7th Edition):
Seo, Sujin. “Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing.” 2016. Web. 22 Feb 2020.
Vancouver:
Seo S. Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2016. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/2142/90937.
Council of Science Editors:
Seo S. Design and characterization of colorimetric plasmonic nanostructures for imaging and sensing. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/90937
Addis Ababa University
17.
GISHU, SEMU.
FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/761
► Glucose as adsorbed species on edges of the graphene nanostructures are found to create some significant variations among the nanostructure’s electronic properties and the changes…
(more)
▼ Glucose as adsorbed species on edges of the graphene
nanostructures are found to
create some significant variations among the nanostructure’s electronic properties and
the changes are fruitfully tapped for futuristic nano-sensing applications. The present
study is focused on ab-initio transport measurement for a nano-scale sensor which
comprises of either H or O-edge doped zigzag graphene nanoribbons (zGNRs). A
range of diverse transport phenomenon is observed by either variation of gating, edge
doping, and biomolecular (glucose) attachments or by a combination of all these
factors. Our results of these measurements point towards the suitability of ribbon’s
zigzag edges as glucose attachment sites for the sensing purpose. Furthermore,
transformations of conductivity, density of states, and current-voltage characteristics
are studied in the nanostructural two-dimensional forms of carbon with foreign atoms
doped in or in vicinity of the honeycomb lattice. In addition, we proposed some
capable sensing device architectures for exploiting the newly explored unique
functionalities. It is important to precisely control and study the density and character
of the charge carriers, nature of chemical doping, and biomolecular adsorbates for
tailoring the proposed in-vivo glucose sensor’s properties. First principle two probe
methods are used in this work for the nanodevice simulation in conjunction with
density functional theory (DFT) and nonequilibrium Green function (NEGF) methods
in a standard electron-correlation approximation scheme of local density (LDA).
Advisors/Committee Members: Prof. Javed Mazher (advisor).
Subjects/Keywords: Graphene nanostructures;
Glucose
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APA (6th Edition):
GISHU, S. (2013). FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/761
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
GISHU, SEMU. “FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
.” 2013. Thesis, Addis Ababa University. Accessed February 22, 2020.
http://etd.aau.edu.et/dspace/handle/123456789/761.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
GISHU, SEMU. “FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
.” 2013. Web. 22 Feb 2020.
Vancouver:
GISHU S. FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2020 Feb 22].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/761.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
GISHU S. FIRST PRINCIPLE SIMULATIONS FOR ELECTRONIC STUCTURES AND TRANSPORT PROPERTIES OF EDGE DOPED GRAPHENE NANOSTRUCTURES FOR APPLICATIONS IN GLUCOSE SENSORS
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/761
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cornell University
18.
Ruiz-Vargas, Carlos.
Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
.
Degree: 2013, Cornell University
URL: http://hdl.handle.net/1813/33989
► Graphene has recently emerged as a promising material for a wide range of potential applications, thanks to its outstanding electrical, mechanical, thermal and optical properties.…
(more)
▼ Graphene has recently emerged as a promising material for a wide range of potential applications, thanks to its outstanding electrical, mechanical, thermal and optical properties. This interest has fueled many efforts to establish methods for large scale graphene synthesis. One of the most promising scalable approaches is to obtain graphene on metal surfaces, most notably on copper, via chemical vapor deposition (CVD). We have developed novel fabrication methods to obtain CVD graphene devices in large quantities. This allowed a thorough study of the polycrystalline structure in CVD graphene, as well as the characterization of mechanical and electrical properties, which are affected by graphene's grain structure. We found that grain boundaries are not the dominant factor in determining the electrical properties of devices. However, grain boundaries were observed to strongly affect graphene mechanical properties. For example, tearing and unzipping along grain boundaries were observed in graphene membranes, as a result of nanoindentation. Finally, we have fabricated microcapsules featuring atomically thin windows made of reinforced double-layer CVD graphene. We have demonstrated the use of these windows for scanning electron microscopy (SEM) of samples in water. As proof of principle, we have imaged metallic nanoparticles in solution, with resolution and signal to noise ratio superior to those obtained with polyimide-based commercially available environmental cells.
Advisors/Committee Members: Ralph, Daniel C (committeeMember), Hennig, Richard G. (committeeMember).
Subjects/Keywords: carbon;
nanostructures;
graphene
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APA (6th Edition):
Ruiz-Vargas, C. (2013). Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
. (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/33989
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ruiz-Vargas, Carlos. “Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
.” 2013. Thesis, Cornell University. Accessed February 22, 2020.
http://hdl.handle.net/1813/33989.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ruiz-Vargas, Carlos. “Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
.” 2013. Web. 22 Feb 2020.
Vancouver:
Ruiz-Vargas C. Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
. [Internet] [Thesis]. Cornell University; 2013. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/1813/33989.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ruiz-Vargas C. Synthesis, Morphology And Properties Of Polycrystalline Graphene Membranes
. [Thesis]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33989
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Victoria University of Wellington
19.
Prakash, Tushara.
Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials.
Degree: 2017, Victoria University of Wellington
URL: http://hdl.handle.net/10063/6422
► This thesis was motivated by the different properties exhibited by magnetic nanoparticles when compared with the bulk. For example the coercivity and magnetocrystalline anisotropy vary…
(more)
▼ This thesis was motivated by the different properties exhibited by magnetic nanoparticles when compared with the bulk. For example the coercivity and magnetocrystalline anisotropy vary with the particle size and the finite particle size can affect the spin-wave dispersion. When the nanoparticle radius becomes small enough it is possible to observe superparamagnetism with negligible hysteresis. The transport properties can also be different in nanoparticle composites when compared with the bulk. It is particularly interesting if the nanoparticles have a degree of electronic spin polarization because it is then possible to observe spin-dependent tunnelling. This thesis reports the results from a study of the structural, magnetic, and electronic properties of two partially electronically spin-polarized nanostructured compounds, iron-nickel alloy and magnetite, that were made using a new arc-discharge method, ion implantation and annealing, and a co-precipitation method.
It was found that permalloy powders could be made by arc-discharge where there were a range of particle sizes from nms to 10s of microns. Magnetoresistance was observed where it is due to the ordinary magnetoresistance and spin-dependent tunnelling between the particles. It was also possible to make magnetite using the arc-discharge process and the powders contained nanoparticles, large faceted nanoparticles, and larger particles in the 10s of micron range. The temperature dependence of the saturation magnetization changes at 127 K, which can be attributed to the charge-ordering Verwey transition. A large magnetoresistance was observed and attributed to spin-dependent tunnelling between the magnetite particles. It was less than predicted due to a spin-disordered interfacial region. The electrical resistance was modelled in terms of small nanoparticles coating the larger particles and electrostatic charging during tunnelling between small nanoparticles. Magnetite powders were also synthesized via a chemical co-precipitation method where nanoparticles with diameters of ~14 nm were observed. The Verwey transition was only observed in the zero-field cooled field-cooled magnetization for the arc-discharge powders. It was observed for the magnetite powders made using both methods in the temperature dependence of the saturation moment. The saturation magnetic moment for powders made using both methods has a power law dependence on temperature with an exponent of 3/2 at low temperatures and a higher value above the Verwey transition temperature 2. There was also a large magnetoresistance due to spin-dependent tunnelling for magnetite nanoparticle made using a chemical co-precipitation method and the electrical resistance could be modelled in terms of electrostatic charging during tunnelling.
NixFe₁₋x nanoparticles were made for the first time by ion beam implantation. Small superparamagnetic nanoparticles occurred after implantation. The saturation moment after implantation did not follow the Bloch’s T³/² for x=0.82, which is likely to be due to spin-waves…
Advisors/Committee Members: Williams, Grant, Kennedy, John V..
Subjects/Keywords: Nanostructures; Magnetic; Nanoparticles
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APA (6th Edition):
Prakash, T. (2017). Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials. (Doctoral Dissertation). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/6422
Chicago Manual of Style (16th Edition):
Prakash, Tushara. “Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials.” 2017. Doctoral Dissertation, Victoria University of Wellington. Accessed February 22, 2020.
http://hdl.handle.net/10063/6422.
MLA Handbook (7th Edition):
Prakash, Tushara. “Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials.” 2017. Web. 22 Feb 2020.
Vancouver:
Prakash T. Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials. [Internet] [Doctoral dissertation]. Victoria University of Wellington; 2017. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/10063/6422.
Council of Science Editors:
Prakash T. Structural, Magnetic and Electronic Properties of Nanostructured Magnetic Materials. [Doctoral Dissertation]. Victoria University of Wellington; 2017. Available from: http://hdl.handle.net/10063/6422
Rutgers University
20.
Mukherjee, Dwaipayan, 1984-.
Computational modeling of nanoparticle distribution and toxicity in biological systems.
Degree: PhD, Chemical and Biochemical Engineering, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/47478/
► Engineered Nanoparticles are increasingly becoming a part of our daily lives due to their presence in an overwhelming majority of consumer products. Potential health risks…
(more)
▼ Engineered Nanoparticles are increasingly becoming a part of our daily lives due to their presence in an overwhelming majority of consumer products. Potential health risks due to chronic exposure to such particulate matter have not been properly evaluated. A multiscale, mechanistic, toxicodynamic model was developed as part of this dissertation, for studying the impact of inhaled nanoparticles on lung function in mammalian biological systems. The biologically-based model was developed in a modular fashion, with separate consideration given to NP distribution in the entire organism as well as various mechanisms at the cell, tissue, organ, and organism levels. Specifically the effect of inhaled nanoparticles on pulmonary function is evaluated and estimated based on resultant surfactant dysfunction. Pulmonary surfactant depletion is explicitly modeled by incorporating dynamics of surfactant constituents such as phospholipids and various lipoproteins. Various nanoparticle transformation processes such as agglomeration, dissolution, diffusion, and lipid adsorption inside biological systems, are explicitly considered and their effects on surfactant modification assessed. The model relates pulmonary mechanics at the organ level with cellular level surfactant dynamics in the lung, both of which are affected by nanoparticle inhalation. The model was evaluated with data from in vitro and in vivo measurements of surfactant levels, cell counts, and overall dynamic impedance in rodent lungs. The model was also extrapolated to adult humans and prediction of changes in pulmonary tissue resistance and elastance in humans are presented based on comparable one-time nanoparticle exposure. This is the first instance of a comprehensive modeling framework integrating research and mechanistic information regarding nanoparticle-biosystem interactions at multiple scales and linking pulmonary mechanisms and processes due to interaction with particulate matter with pulmonary function in human subjects.
Advisors/Committee Members: Georgopoulos, Panos G. (chair), Pedersen, Henrik (internal member), Androulakis, Ioannis P. (internal member), Shapley, Nina (internal member), Gow, Andrew J. (outside member).
Subjects/Keywords: Nanoparticles; Nanostructures; Toxicology
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APA (6th Edition):
Mukherjee, Dwaipayan, 1. (2015). Computational modeling of nanoparticle distribution and toxicity in biological systems. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/47478/
Chicago Manual of Style (16th Edition):
Mukherjee, Dwaipayan, 1984-. “Computational modeling of nanoparticle distribution and toxicity in biological systems.” 2015. Doctoral Dissertation, Rutgers University. Accessed February 22, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/47478/.
MLA Handbook (7th Edition):
Mukherjee, Dwaipayan, 1984-. “Computational modeling of nanoparticle distribution and toxicity in biological systems.” 2015. Web. 22 Feb 2020.
Vancouver:
Mukherjee, Dwaipayan 1. Computational modeling of nanoparticle distribution and toxicity in biological systems. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2020 Feb 22].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47478/.
Council of Science Editors:
Mukherjee, Dwaipayan 1. Computational modeling of nanoparticle distribution and toxicity in biological systems. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/47478/
Rutgers University
21.
Bao, Jianhua, 1977-.
Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures.
Degree: PhD, Chemistry, 2015, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/48794/
► The dissertation consists of two sections, each of which addresses the excited state dynamics, charge separation and recombination in two classes of nano-structured materials. While…
(more)
▼ The dissertation consists of two sections, each of which addresses the excited state dynamics, charge separation and recombination in two classes of nano-structured materials. While the materials are different, the underlying theoretical background, as well as the experimental techniques which were employed in the course of these investigations is closely related. Project 1: A series of crystalline nanometer size polyoxotitanate cluster offers a good opportunity to study the structure-dynamics correlations. Its core-ligand interface, the presence of non-equivalent metal sites and quantum size supply us attractive, experimentally and theoretically tractable models to study exciton dynamics and charge carrier localization. The charge-transfer (CT), exciton dynamics and electronic structure of Ti/O clusters were studied by comprehensive approaches including ultrafast time-dependent spectroscopy, fast pulse radiolysis, ground state spectroscopy and theoretical calculations. The factors which can influence exciton dynamics are discussed individually, e.g., cluster size, surface modification, and solvent polarity. Through dynamics study of exciton in Ti/O cluster we have better understanding about the reactions occurring on the TiO2 nanoparticles, which serve as a potent photocatalyst for hydrogen production and pollutant remediation. Project 2: Surface enhanced fluorescence (SEF) of P3HT was measured in a tailored environment from silver surface with and without gold nanocones on it, and rough gold surface (Klarite substrate). The accelerated fluorescence dynamics and emission spectra were recorded through Kerr-gated ultrafast fluorescence microscope with 100 fs resolution. Competitive radiative, electron transfer processes are studied in various thickness P3HT films; and enhanced interchain electronic energy transfer was confirmed by fluorescence anisotropy measurements.
Advisors/Committee Members: Piotrowiak, Piotr (chair).
Subjects/Keywords: Exciton theory; Nanostructures
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APA (6th Edition):
Bao, Jianhua, 1. (2015). Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/48794/
Chicago Manual of Style (16th Edition):
Bao, Jianhua, 1977-. “Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures.” 2015. Doctoral Dissertation, Rutgers University. Accessed February 22, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/48794/.
MLA Handbook (7th Edition):
Bao, Jianhua, 1977-. “Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures.” 2015. Web. 22 Feb 2020.
Vancouver:
Bao, Jianhua 1. Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures. [Internet] [Doctoral dissertation]. Rutgers University; 2015. [cited 2020 Feb 22].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48794/.
Council of Science Editors:
Bao, Jianhua 1. Exciton dynamics in nanometer size polyoxotitanate clusters and excited states dynamics of P3HT films in proximity to metallic nanostructures. [Doctoral Dissertation]. Rutgers University; 2015. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/48794/
Rutgers University
22.
Yin, Perry, 1988-.
Multifunctional nanoparticle-based approaches to enhance the treatment of cancer.
Degree: PhD, Biomedical Engineering, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/49349/
► Magnetic nanoparticles (MNPs) hold tremendous potential for various biomedical applications, including cancer diagnosis and treatment, owing to their unique ability to be manipulated by magnetic…
(more)
▼ Magnetic nanoparticles (MNPs) hold tremendous potential for various biomedical applications, including cancer diagnosis and treatment, owing to their unique ability to be manipulated by magnetic fields. In particular, cancer applications of MNPs have primarily utilized MNPs as MRI contrast agents, drug delivery vehicles, and as agents for magnetic hyperthermia. Significant progress has already been made in the advancement of MNP-based therapies to the clinic; however, tumor targeting and chemoresistance remain significant challenges. Addressing these challenges, this thesis focuses on the development of novel multifunctional MNP-based combination therapies. In the first half of this thesis, novel MNP and magnetic core-shell nanoparticle (MCNP)-based combination therapies are developed to enhance the treatment of cancer by sensitizing cancer cells to subsequent therapies. To this end, MNPs are first developed for the dual purpose of delivering microRNA and inducing magnetic hyperthermia for the treatment of brain cancer. We demonstrate that the combination of lethal-7a microRNA (let-7a), which targets a number of survival pathways, can sensitize cancer cells to subsequent magnetic hyperthermia. Moreover, we demonstrate the use of MCNPs that are composed of a magnetic core and a mesoporous silica shell for the simultaneous delivery of let-7a and doxorubicin, wherein let-7a was found to sensitize breast cancer cells to subsequent doxorubicin chemotherapy. In the second half of this thesis, to overcome poor tumor targeting, a stem cell-based gene therapy is developed. Specifically, MCNPs are reported for the dual purpose of delivering and activating a heat-inducible gene vector that encodes TNF-related apoptosis-inducing ligand (TRAIL) in adipose-derived mesenchymal stem cells (AD-MSCs) for the treatment of ovarian cancer. These engineered AD-MSCs retained their innate ability to home to tumors, making them ideal cellular carriers for cancer therapy. Moreover, mild magnetic hyperthermia resulted in the selective expression of TRAIL in the engineered AD-MSCs thereby inducing significant cancer cell death. Overall, this thesis has demonstrated two multifunctional MNP-based approaches for cancer therapy: 1) combined MNP-based delivery of microRNA and magnetic hyperthermia to sensitize cancers to subsequent chemotherapy and 2) MCNP-based activation of heat-inducible genes in stem cells for targeted cancer treatment.
Advisors/Committee Members: Lee, Ki-Bum (chair), Cai, Li (internal member), Roth, Charles (internal member), Suh, Nanjoo (outside member).
Subjects/Keywords: Cancer – Treatment; Nanostructures
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APA ·
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APA (6th Edition):
Yin, Perry, 1. (2016). Multifunctional nanoparticle-based approaches to enhance the treatment of cancer. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/49349/
Chicago Manual of Style (16th Edition):
Yin, Perry, 1988-. “Multifunctional nanoparticle-based approaches to enhance the treatment of cancer.” 2016. Doctoral Dissertation, Rutgers University. Accessed February 22, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/49349/.
MLA Handbook (7th Edition):
Yin, Perry, 1988-. “Multifunctional nanoparticle-based approaches to enhance the treatment of cancer.” 2016. Web. 22 Feb 2020.
Vancouver:
Yin, Perry 1. Multifunctional nanoparticle-based approaches to enhance the treatment of cancer. [Internet] [Doctoral dissertation]. Rutgers University; 2016. [cited 2020 Feb 22].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/49349/.
Council of Science Editors:
Yin, Perry 1. Multifunctional nanoparticle-based approaches to enhance the treatment of cancer. [Doctoral Dissertation]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/49349/
Rutgers University
23.
Yu, Binxing, 1988-.
Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications.
Degree: MS, Chemistry and Chemical Biology, 2016, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/50500/
► Plasmonics is a research area encompassing the fields of optics and nanoelectronics by confining light with relative large free-space wavelength to the nanometer scale. Specifically,…
(more)
▼ Plasmonics is a research area encompassing the fields of optics and nanoelectronics by confining light with relative large free-space wavelength to the nanometer scale. Specifically, plasmonic metal
nanostructures have the potential to manage and enhance optical electromagnetic fields, making them essential tools for applications in fields such as photovoltaics, nano-optical sensors, enhanced information storage, light-emitting devices and photocatalysis. Also, the relatively high carrier transport rate, lower cost and synthetic tenability have given rise to an increasing amount of research on ultra-thin conjugated polymer films based optoelectronic devices, which indicates its essential role in next generation devices. Here, we demonstrate the deposition of gold monopole nanoantenna arrays onto sub-50 nm poly(3-hexylthiophene) (P3HT) films on Ag substrate can result in significant absorption enhancement (>12 at the P3HT band edge) and spectral broadening (more than 250 nm increase) relative to P3HT/Ag films without plasmonic nanorod arrays. Full-field electromagnetic simulations are used to identify the modes of the plasmonic nanorod array/P3HT/Ag film system. In our case, gap modes are the primary contributor to the local field enhancement, hence the absorption enhancement in polythiophene thin film “gap” region. We then seek to validate the gap modes effect using single nanoparticle (NP) spectroscopy in the Ag NP/P3HT/Ag film system. Furthermore, future proposed work including photocurrent measurement through fabrication of ultra-thin nanoantenna incorporated organic photovoltaic devices, internal photoemission and light emitting diodes will be discussed.
Advisors/Committee Members: Baum, Jean (chair), O'Carroll, Deirdre (internal member), Garfunkel, Eric (internal member), Asefa, Teddy (internal member).
Subjects/Keywords: Nanostructures; Plasmons (Physics)
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APA (6th Edition):
Yu, Binxing, 1. (2016). Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/50500/
Chicago Manual of Style (16th Edition):
Yu, Binxing, 1988-. “Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications.” 2016. Masters Thesis, Rutgers University. Accessed February 22, 2020.
https://rucore.libraries.rutgers.edu/rutgers-lib/50500/.
MLA Handbook (7th Edition):
Yu, Binxing, 1988-. “Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications.” 2016. Web. 22 Feb 2020.
Vancouver:
Yu, Binxing 1. Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications. [Internet] [Masters thesis]. Rutgers University; 2016. [cited 2020 Feb 22].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50500/.
Council of Science Editors:
Yu, Binxing 1. Light management in ultra-thin conjugated polymer layers using plasmonic nanostructures for optoelectronic applications. [Masters Thesis]. Rutgers University; 2016. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/50500/
Hong Kong University of Science and Technology
24.
Man, Michael Ka Lun.
Characterization of wetting layers and nanostructures at surfaces.
Degree: 2011, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-7363
;
https://doi.org/10.14711/thesis-b1155098
;
http://repository.ust.hk/ir/bitstream/1783.1-7363/1/th_redirect.html
► Wetting layer at surfaces plays a very important role in the growth of thin film and nanostructures as it defines a modified surface layer on…
(more)
▼ Wetting layer at surfaces plays a very important role in the growth of thin film and nanostructures as it defines a modified surface layer on which other structures are grown. The wetting layer also changes the physical and electronic properties of the surface and hence it can influence the growth and properties of nanostructures which sit on top. In this thesis, we will characterize the wetting layers and the nanostructures on top using Low Energy Electron Microscopy/Diffraction (LEEM/LEED), and Spectroscopic PhotoEmission and Low Energy Electron Microcopy. We will examine my research on two different metal on semiconductor systems, Pb/Si(111) and Fe/ZnS(001), as well as carbon-based layers on metal surfaces, C60/Pt(111) and graphene/Ru(0001). The main accomplishments of this thesis are summarized as follows. An exceptionally unusual mass transport behavior has been discovered in the dense Pb wetting layer on the Si(111) surface. Mass transport is studied by observing non-equilibrium coverage profile evolution with LEEM and micro-LEED. During equilibration, an initial coverage step profile produced by laser induced thermal desorption retains its shape as it is displaced linearly in time. This contrasts with the profile broadening and gradual time-dependent evolution that is expected from classical consideration. Equally inexplicable in the classical context is a small but discrete coverage discontinuity in the wetting layer that expands radially outward like a wavefront. Our observations signal the presence of a very novel super-diffusive mass transport mechanism, which is much more efficient at transporting mass across a surface than stochastic atomic hopping processes. In the study of Fe/ZnS(001), nanowires of high aspect ratio are prepared by epitaxial growth and we observed a complex and strongly temperature dependent nanowire growth behavior. Two kinds of magnetic nanowires have been found, one of which is pure Fe and the other may contain some kind of iron sulfide, probably greigite (Fe3S4), at least on the surface. C60 on the Pt(111) surface forms two ordered phases: (√13x√13)R13.9° and (2√3x2√3x)R30° that normally coexist. In the current work, the two phases are isolated experimentally and intensity vs. voltage, I(V), curves are measured. Their structural details are extracted by combined dynamic LEED analysis of I(V) curves and density functional theory calculations. Our results show that both phases involve substrate reconstruction, producing atom vacancies directly under the C60 molecules. In graphene/Ru(0001), we have found no evidence of broken mirror symmetry in the diffraction peak intensities measured with micro-LEED on a length scale of 250 nm to support the recent report of chirality in this system. Instead, small rotations of the graphene lattice from orientational coincidence with the substrate are evident in moiré-derived diffraction features. Additionally, bias of the lattice rotation on the two different surface terminations of the hcp substrate has been found.
Subjects/Keywords: Nanostructures – Surfaces
; Wetting
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APA (6th Edition):
Man, M. K. L. (2011). Characterization of wetting layers and nanostructures at surfaces. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7363 ; https://doi.org/10.14711/thesis-b1155098 ; http://repository.ust.hk/ir/bitstream/1783.1-7363/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Man, Michael Ka Lun. “Characterization of wetting layers and nanostructures at surfaces.” 2011. Thesis, Hong Kong University of Science and Technology. Accessed February 22, 2020.
http://repository.ust.hk/ir/Record/1783.1-7363 ; https://doi.org/10.14711/thesis-b1155098 ; http://repository.ust.hk/ir/bitstream/1783.1-7363/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Man, Michael Ka Lun. “Characterization of wetting layers and nanostructures at surfaces.” 2011. Web. 22 Feb 2020.
Vancouver:
Man MKL. Characterization of wetting layers and nanostructures at surfaces. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2011. [cited 2020 Feb 22].
Available from: http://repository.ust.hk/ir/Record/1783.1-7363 ; https://doi.org/10.14711/thesis-b1155098 ; http://repository.ust.hk/ir/bitstream/1783.1-7363/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Man MKL. Characterization of wetting layers and nanostructures at surfaces. [Thesis]. Hong Kong University of Science and Technology; 2011. Available from: http://repository.ust.hk/ir/Record/1783.1-7363 ; https://doi.org/10.14711/thesis-b1155098 ; http://repository.ust.hk/ir/bitstream/1783.1-7363/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Hong Kong University of Science and Technology
25.
Zeng, Xiping.
Application of the functional surface/interface of Nano/Micro systems.
Degree: 2015, Hong Kong University of Science and Technology
URL: http://repository.ust.hk/ir/Record/1783.1-80206
;
https://doi.org/10.14711/thesis-b1514797
;
http://repository.ust.hk/ir/bitstream/1783.1-80206/1/th_redirect.html
► Investigation of the surface/ interface of Nano/Micro systems plays an essential role in lots of areas, include the synthesis and assembly of nanostructures, evaporation of…
(more)
▼ Investigation of the surface/ interface of Nano/Micro systems plays an essential role in lots of areas, include the synthesis and assembly of nanostructures, evaporation of liquid, etc. Through studying the interaction between the polyvinyl pyrrolidone (PVP) and the surface of the silver nanowires (AgNWs), it was found that the PVP, serving as a capping agent, has a great impact on the morphology and structure of AgNWs. By means of a series of experiments, the critical minimum PVP chain length for successful formation of uniform nanowires was discovered, below which, only nanoparticles or short Nano rods can be obtained. Surprisingly, a core-shell structure of nanowire with a polycrystal was observed when the PVP with very long chain length was employed in the processing. By controlling the interaction between the Ag NWs and the surface of the substrates, a one-step method was developed for the fabrication of electrodes with patterns. Such film comprising Ag NWs were only self-growing or grafted on a hydrophilic surface area instead of the hydrophobic one. Thus, the selective patterning of the conducting film on the hybrid substrate surface can be realized, which is etching-free method for metal removal usually for the fabrication of electrodes by lithographic process or laser cutting. Therefore, such technique for producing conducting film is green and environmental friendly. A biochip based silver nano dendritic structures was fabricated to detect Carcinoembryonic antigen (CEA), which is a common tumor marker in clinical tests. Results show that the Raman signal of the CEA enhanced by about 104 times compared with silver nanowires, which is capable of detecting CEA at 1 fg/mL. The surface of liquid water, especial the hydration of ions on the surface, which are of fundamental interest and have potential applications, remain unclear. A fantastic and extraordinary phenomenon was observed during the evaporation of a water droplet doped with manganese chloride. As observed from the evolution of this type of droplet, a thin film was formed on the surface with an exothermic phase transition, resulting in self-suppressed evaporation. The MnCl2-doped water droplets were maintained in a relative humidity (RH) of 50% at 40 °C for more than a week and for longer than two months at a temperature of 25 °C. In contrast, a pure water droplet can only be sustained for a few minutes. The self-suppressed evaporation of doped water was due to the special hydration of the accumulated manganese and chloride ions at the surface, decreasing the surface tension.
Subjects/Keywords: Nanowires
; Povidone
; Nanostructures
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APA ·
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APA (6th Edition):
Zeng, X. (2015). Application of the functional surface/interface of Nano/Micro systems. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-80206 ; https://doi.org/10.14711/thesis-b1514797 ; http://repository.ust.hk/ir/bitstream/1783.1-80206/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zeng, Xiping. “Application of the functional surface/interface of Nano/Micro systems.” 2015. Thesis, Hong Kong University of Science and Technology. Accessed February 22, 2020.
http://repository.ust.hk/ir/Record/1783.1-80206 ; https://doi.org/10.14711/thesis-b1514797 ; http://repository.ust.hk/ir/bitstream/1783.1-80206/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zeng, Xiping. “Application of the functional surface/interface of Nano/Micro systems.” 2015. Web. 22 Feb 2020.
Vancouver:
Zeng X. Application of the functional surface/interface of Nano/Micro systems. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2015. [cited 2020 Feb 22].
Available from: http://repository.ust.hk/ir/Record/1783.1-80206 ; https://doi.org/10.14711/thesis-b1514797 ; http://repository.ust.hk/ir/bitstream/1783.1-80206/1/th_redirect.html.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zeng X. Application of the functional surface/interface of Nano/Micro systems. [Thesis]. Hong Kong University of Science and Technology; 2015. Available from: http://repository.ust.hk/ir/Record/1783.1-80206 ; https://doi.org/10.14711/thesis-b1514797 ; http://repository.ust.hk/ir/bitstream/1783.1-80206/1/th_redirect.html
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Nelson Mandela Metropolitan University
26.
Gandidzanwa, Sendibitiyosi.
The development of palladium nanoparticles for radiopharmaceutical application.
Degree: 2019, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/42163
► The dissertation describes an in-depth synthesis and optimisation of palladium(0) nanoparticles of three distinct size ranges, respective capping agents, and cellular uptake studies using a…
(more)
▼ The dissertation describes an in-depth synthesis and optimisation of palladium(0) nanoparticles of three distinct size ranges, respective capping agents, and cellular uptake studies using a non-toxic concentration (10 μM), laying a foundation for the design of palladium-based folate receptor-targeted theranostic nanoradiopharmaceutical. In the preliminary selection to determine the optimal diamines for the study, ethylenediamine, hexamethylenediamine, 1,10-diaminodecane, 1,12-diaminododecane, 1,4- diaminobenzene, 4,4’-ethylenedianiline, 1,2-diphenyl-1,2-diaminoethane, and tetraaminophthalocyanine were employed. The characterisation of the nanoparticles obtained from the in situ reduction of palladium(II) salt at room temperature by either 1,2,3- trihydroxybenze (pyrogallol), citric acid, sodium metabisulphite, sodium borohydride, hydrazine hydrate, or formaldehyde was performed. Ethylenediamine and sodium borohydride were found to be the best diamine capping and reducing agent, respectively. Systematic investigations determined that the nanoparticle synthesis was dependent on various reaction parameters: such as reaction temperature, time, reductant reducing power, and capping agents. The parameters effects on the nanoparticle size, morphology, shape, stability, crystallinity, and surface charge were investigated. The optical properties, elemental composition, functional group, concentration and molecular weight for the synthesised nanoparticles or conjugates were determined. These properties were analysed using Ultraviolet–visible spectroscopy (UV-Vis), high resolution transmission electron microscopy (HRTEM) coupled with selective area electron diffraction (SAED) and energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRD), zeta potential (ZP), dynamic light scattering (DLS), elemental analysis (EA), 1H and 13C-nuclear magnetic resonance (1H- and 13CNMR), Fourier-transform infrared spectroscopy (FTIR), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and liquid chromatography-mass spectroscopy (LC-MS). The in vitro cytotoxicity, cell uptake, and internalisation studies of palladium nanoparticles (10 μM) ranging in size and different types of capping agent were performed using three breast cancer cell lines: MDA-MB-468 , MCF-7 and MDA-MB-231 , and a non-tumorigenic MCF-10A breast cell line. The cell uptake and internalisation were investigated using ICP-OES and TEM. A high dependence between reduction rate and concentration of palladium precursor was observed for the room temperature synthesis of palladium nanoparticles, and the employed synthesis procedure will be applied to the hot palladium isotope (109Pd). A facile, green, aqueous synthesis route for palladium nanoparticles at room temperature was developed, and the synthesised nanoparticles indicated narrow size distributions. A concentration dependence between cytotoxicity and palladium nanoparticles was observed, with lower concentrations (10 μM) exhibiting minimal cytotoxicity relative to higher concentrations (100 μM).…
Subjects/Keywords: Nanotechnology; Nanostructures; Nanofluids
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APA ·
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APA (6th Edition):
Gandidzanwa, S. (2019). The development of palladium nanoparticles for radiopharmaceutical application. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/42163
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gandidzanwa, Sendibitiyosi. “The development of palladium nanoparticles for radiopharmaceutical application.” 2019. Thesis, Nelson Mandela Metropolitan University. Accessed February 22, 2020.
http://hdl.handle.net/10948/42163.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gandidzanwa, Sendibitiyosi. “The development of palladium nanoparticles for radiopharmaceutical application.” 2019. Web. 22 Feb 2020.
Vancouver:
Gandidzanwa S. The development of palladium nanoparticles for radiopharmaceutical application. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2019. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/10948/42163.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gandidzanwa S. The development of palladium nanoparticles for radiopharmaceutical application. [Thesis]. Nelson Mandela Metropolitan University; 2019. Available from: http://hdl.handle.net/10948/42163
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Indian Institute of Science
27.
Singh, Satyendra.
Synthesis And Studies Of Perovskite Nanostructures.
Degree: 2008, Indian Institute of Science
URL: http://hdl.handle.net/2005/784
► The group of materials with ABO3 type perovskite structure are very important due to their attractive electrical and magnetic properties for technological applications and have…
(more)
▼ The group of materials with ABO3 type perovskite structure are very important due to their attractive electrical and magnetic properties for technological applications and have been studied in the form of single crystals, bulk polycrystalline materials and thin films. Recently, efforts have been made to synthesize and understand the growth of ABO3 type perovskite
nanostructures because of their distinctive physical properties and potential applications in the nanodevices. The primary aim of the present thesis is to synthesize the perovskites at nano-scale, with zero-dimension (0D), and one-dimension (1D) configurations. Basic work was carried in terms of synthesis – structure – composition correlation. Due to the small nature of the synthesized materials, few attempts were done to examine the physical properties, but to a limited extant. Efforts were also done to emphasize the structural behavior of nano perovskite in comparison with their bulk counterparts.
Chapter 1 provides a brief introduction to perovskite materials and
nanostructures, their technological applications and the fundamental physics involved. A brief review of the perovskite
nanostructures both from fundamental science and technological point of view is provided. Finally the specific objectives of the current research are outlined.
Chapter 2 deals with the experimental studies carried out in this thesis. It describes the methods used for the synthesis, experimental set up and the basic operation principles of various structural and physical characterizations such as X-ray diffraction (XRD), thermal analysis, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM), compositional analysis (EDX), focused ion beam (FIB), electrical and magnetic studies of the materials prepared.
Chapter 3 describes the fabrication of porous anodic aluminum oxide (AAO) templates with different pore size, basic steps for synthesis of nanotubes and the possible growth mechanism of nanotubes in the AAO template.
In chapter 4, we report the synthesis of ferroelectric Ba1-xSrxTiO3 (x = 0.0, 0.3) nanoparticles (diameter range: 20-40nm) and Ba1-xSrxTiO3 (x = 0.0, 0.4) nanotubes with diameter about 200nm by the sol-gel method. The Ba1-xSrxTiO3
nanostructures so obtained were characterized by number of techniques, including FE-SEM, XRD, DTA/TGA, FTIR spectroscopy, TEM, HRTEM as well as EDX and SAED. Formation of Y-junctions and multi-branches in Ba1-xSrxTiO3 nanotubes were also observed. The wall of the nanotubes were found to be made of randomly oriented nanoparticles which were confirmed from the HRTEM image. The average thickness of the wall of the nanotubes was found around 15(±5) nm and nanoparticles consisting the wall were found to be in the range of 5-10nm. Diffused phase transition (cubic to tetragonal), shifted to lower temperature side and leaky ferroelectric P–E loops were observed in Ba1-xSrxTiO3 (x = 0.0) ceramic prepared from nanoparticles. Curie temperature was observed at 120 °C in the BT…
Advisors/Committee Members: Krupanidhi, S B.
Subjects/Keywords: Nanomaterials - Fabrication; Nanoparticles - Synthesis; Ferroelectric Nanostructures; Piezoelectric Nanostructures; Nano Perovskites; Nanotubes; Nanostructures - Synthesis; Perovskite Oxides; Nanostructures - Properties; Antiferroelectric Nanostructures; Relaxor Nanostructures; Ferromagnetic Nanostructures; Perovskite Nanostructure; Perovskite Manganites; Sol-gel; Nanotechnology
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APA ·
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Singh, S. (2008). Synthesis And Studies Of Perovskite Nanostructures. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/784
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Singh, Satyendra. “Synthesis And Studies Of Perovskite Nanostructures.” 2008. Thesis, Indian Institute of Science. Accessed February 22, 2020.
http://hdl.handle.net/2005/784.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Singh, Satyendra. “Synthesis And Studies Of Perovskite Nanostructures.” 2008. Web. 22 Feb 2020.
Vancouver:
Singh S. Synthesis And Studies Of Perovskite Nanostructures. [Internet] [Thesis]. Indian Institute of Science; 2008. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/2005/784.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Singh S. Synthesis And Studies Of Perovskite Nanostructures. [Thesis]. Indian Institute of Science; 2008. Available from: http://hdl.handle.net/2005/784
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
Boudinar, Salem.
Cinétique de l’électrodéposition de phase dure de nanostructure magnétique.
Degree: 2010, Université M'Hamed Bougara Boumerdès
URL: http://dlibrary.univ-boumerdes.dz:8080123456789/1282
► 86 p. : ill. ; 30 cm
L’objectif recherché dans ce travail, est l’étude de la cinétique électrochimique du système Mn-Bi, en vue de son…
(more)
▼ 86 p. : ill. ; 30 cm
L’objectif recherché dans ce travail, est l’étude de la cinétique électrochimique du système Mn-Bi, en vue de son électrodéposition en couches minces sur un substrat du cuivre. Le Mn-Bi dans sa phase hexagonale est un matériau magnétique dur (fort Hc) avec une forte anisotropie uniaxiale le long de l’axe C. Il pourrait donc trouver une application intéressante dans le domaine de l’enregistrement magnétique. Un bain mixte sulfate- nitrate a été utilisé, et l’électrodéposition simultanée des deux métaux Mn et Bi est faite en mode potentiostatique. L’étude de la cinétique électrochimique qui s’est faite par la voltammètrie cyclique, et la caractérisation physico-chimique et structurale des films élaborés par microscopie électronique à balayage et analyse X (EDX, DRX)
Subjects/Keywords: Matériaux magnétiques; Cinétique chimique; Nanostructures
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APA (6th Edition):
Boudinar, S. (2010). Cinétique de l’électrodéposition de phase dure de nanostructure magnétique. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080123456789/1282
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Boudinar, Salem. “Cinétique de l’électrodéposition de phase dure de nanostructure magnétique.” 2010. Thesis, Université M'Hamed Bougara Boumerdès. Accessed February 22, 2020.
http://dlibrary.univ-boumerdes.dz:8080123456789/1282.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Boudinar, Salem. “Cinétique de l’électrodéposition de phase dure de nanostructure magnétique.” 2010. Web. 22 Feb 2020.
Vancouver:
Boudinar S. Cinétique de l’électrodéposition de phase dure de nanostructure magnétique. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2010. [cited 2020 Feb 22].
Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1282.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Boudinar S. Cinétique de l’électrodéposition de phase dure de nanostructure magnétique. [Thesis]. Université M'Hamed Bougara Boumerdès; 2010. Available from: http://dlibrary.univ-boumerdes.dz:8080123456789/1282
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
29.
Kosonen, Harri.
Functionalization of Polymers with Self-Assembled Nanostructures.
Degree: 2004, Helsinki University of Technology
URL: http://lib.tkk.fi/Diss/2004/isbn9512272881/
► In this thesis, functionalization of polymers with three different types of supramolecular self-assembled nanostructures have been examinated: 1) blends of block copolymers and thermosets, 2)…
(more)
▼ In this thesis, functionalization of polymers with three different types of supramolecular self-assembled
nanostructures have been examinated: 1) blends of block copolymers and thermosets, 2) polymer-amphiphile systems, and 3) block copolymer-amphiphile complexes. Morphologies of complexes were characterized preferentially using small- and wide-angle X-ray scattering, and transmission electron microscopy. The effect of
nanostructures on mechanical, electrical or optical properties were measured with dynamic mechanical spectroscopy, DC- and AC-conductivity, and UV-Vis spectroscopy. In the first example, the self-assembled diblock and triblock copolymer
nanostructures (spherical, "worm-like" cylindrical and lamellar structures) were used to modify the mechanical properties of phenolic resins. Morphology of complexes depended on the weight fraction of microphase separated domain. The storage moduli at room temperature decreased slowly with increasing weight fraction of the microphase separated domain, when the phenolic matrix was continuous. The long period of the structures was of the order of 12-70 nm, depending on the molecular weights of blocks. In the second example, the self-assembled polymer-amphiphile complexes were used to form one-dimensional cylindrical conducting structures with the long period of 3.5 nm using conjugated polymer polyaniline. The conductivity of samples increased rapidly two orders of magnitude when the cylindrical structure was formed. The increase of conductivity is probably due to confinement of polyaniline chains within the cylinders and due to cosolvent effects of the amphiphiles. In the third example, the self-assembled block copolymer-amphiphile structures were used to first achieve molecularly reinforced polyelectrolyte. Complexes formed a lamellar structure, where the conductivity of "liquid-like" polyelectrolyte was decoupled from the segmental motion of the reinforcing glassy domain. Lithium salt was introduced to promote the ionic conductivity. The conductivity levels were relatively low at room temperature probably due to the Coulombic traps and grain boundaries. Finally, the hierarchical structures were used to manipulate optical properties. A high molecular weight block copolymer complexes with surfactants lead to lamellar structure with the long period of ca. 140 nm. All starting materials were almost colourless, but the complexes were predominantly blue pearlescent in reflection to an observer viewing them in ambient. The transmission and reflectance spectra revealed the formation of an incomplete photonic bandgap at ca. 460 nm.
Advisors/Committee Members: Helsinki University of Technology, Department of Engineering Physics and Mathematics, Laboratory of Optics and Molecular Materials.
Subjects/Keywords: nanostructures; self-assembly; supramolecular; polymer
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APA (6th Edition):
Kosonen, H. (2004). Functionalization of Polymers with Self-Assembled Nanostructures. (Thesis). Helsinki University of Technology. Retrieved from http://lib.tkk.fi/Diss/2004/isbn9512272881/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kosonen, Harri. “Functionalization of Polymers with Self-Assembled Nanostructures.” 2004. Thesis, Helsinki University of Technology. Accessed February 22, 2020.
http://lib.tkk.fi/Diss/2004/isbn9512272881/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kosonen, Harri. “Functionalization of Polymers with Self-Assembled Nanostructures.” 2004. Web. 22 Feb 2020.
Vancouver:
Kosonen H. Functionalization of Polymers with Self-Assembled Nanostructures. [Internet] [Thesis]. Helsinki University of Technology; 2004. [cited 2020 Feb 22].
Available from: http://lib.tkk.fi/Diss/2004/isbn9512272881/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kosonen H. Functionalization of Polymers with Self-Assembled Nanostructures. [Thesis]. Helsinki University of Technology; 2004. Available from: http://lib.tkk.fi/Diss/2004/isbn9512272881/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
30.
Zhou, Shuai.
Synthesis and catalytic applications of iron-palladium
nanostructures.
Degree: MS, Department of Chemistry, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/f4752h733
► This thesis focuses on synthesis, characterization and catalytic applications of iron-based nanoparticles (NPs) in Suzuki-Miyaura cross-coupling reactions. Palladium “decorated”
[email protected] NPs (
[email protected]/Pd NPs) were prepared…
(more)
▼ This thesis focuses on synthesis, characterization and
catalytic applications of iron-based nanoparticles (NPs) in
Suzuki-Miyaura cross-coupling reactions. Palladium “decorated”
[email protected] NPs (
[email protected]/Pd NPs) were prepared making use of
established reducing nature and coordinating ability of the
[email protected] NPs.
[email protected]/Pd NPs were evaluated and found to exhibit
high catalytic activity in a series of Suzuki-Miyaura
cross-coupling reactions in aqueous solution at room temperature in
air. The
[email protected]/Pd system was reused efficiently and only a
slight loss of activity was observed after the third reaction.
Furthermore,
[email protected]/Pd has special retention ability for Pd
species making leached Pd negligible. The effect of
[email protected] on the
catalytic activity for Suzuki coupling was investigated and no
visible effect was found. Three Fe-Pd
nanostructures
-“nanodendrites” (ND), nanoparticles (NP1 and NP2) were synthesized
by simultaneous thermal decomposition of Fe(CO)5 and reduction of
Pd(acac)2. ND exhibit a dendritic structure with an average
diameter of 51.6 nm, while NP1 and NP2 exhibit a pseudospherical
morphology with average diameters of 12.8 nm and 17.7 nm,
respectively. The three
nanostructures all contain crystalline FePd
alloy and iron oxides were formed due to exposure to air. They have
high catalytic activities toward Suzuki cross-coupling reactions,
and ND have the highest activity among them. ND were recycled by
applying a magnet and reused three times with some loss of activity
which is readily attributed to material handling
limitations.
Subjects/Keywords: iron-palladium; catalysts; nanostructures
Record Details
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Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhou, S. (2012). Synthesis and catalytic applications of iron-palladium
nanostructures. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/f4752h733
Chicago Manual of Style (16th Edition):
Zhou, Shuai. “Synthesis and catalytic applications of iron-palladium
nanostructures.” 2012. Masters Thesis, University of Alberta. Accessed February 22, 2020.
https://era.library.ualberta.ca/files/f4752h733.
MLA Handbook (7th Edition):
Zhou, Shuai. “Synthesis and catalytic applications of iron-palladium
nanostructures.” 2012. Web. 22 Feb 2020.
Vancouver:
Zhou S. Synthesis and catalytic applications of iron-palladium
nanostructures. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2020 Feb 22].
Available from: https://era.library.ualberta.ca/files/f4752h733.
Council of Science Editors:
Zhou S. Synthesis and catalytic applications of iron-palladium
nanostructures. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/f4752h733
◁ [1] [2] [3] [4] [5] … [38] ▶
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Open Access Theses and Dissertations
