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University of Technology, Sydney
1.
Foley, M.
Luminescence studies of ZnO crystals and nanowires.
Degree: 2011, University of Technology, Sydney
URL: http://hdl.handle.net/10453/29858
► ZnO is a direct semiconductor with a band gap of 3.4 eV at room temperature making it a hot topic for optoelectronic research across a…
(more)
▼ ZnO is a direct semiconductor with a band gap of 3.4 eV at room temperature making
it a hot topic for optoelectronic research across a broad range of applications.
The current solid state lighting technology typically uses nitride semiconductors in
the generation of light, more commonly gallium nitride. ZnO is a more efficient light
generator than GaN owing to its high excitonic binding energy, and for this reason,
ZnO is a potential material that may soon compete with GaN as a cornerstone of
the solid state lighting revolution. Significant obstacles preventing the wide scale
usage of ZnO include the lack of reliable p-type doping and high degree of uncertainty
surrounding the nature of its defects, intrinsic n-type conductivity and optical
properties.
The aim of this thesis is therefore to explore the luminescence and defect properties
of doped and undoped ZnO nanowires and crystals.
During the proj ect, ZnO nanowires were grown through a vapour deposition method
under varying growth conditions. Changes in the choice of substrate, gas flows ,
pressures, and growth times were linked to changes in the structural and optical
properties of the nanowires as characterised by scanning electron imaging and complementary
spectroscopic techniques. Gold coated epitaxially matched sapphire substrates
positioned close to the source material were found to produce highly aligned
nanowires arrays. Cathodoluminescence (CL) imaging showed a localisation of defect
luminescence near the surface of ZnO nanowire sidewalls. Oxygen deficiencies
were also found to be localised on the sidewalls of the nanowires, supporting a correlation
between green luminescence and oxygen vacancies in ZnO.
Post processing plasma modification of ZnO crystals and powders were used to ident
ify defects contribut ing to the observable green luminescence. The defect emissions
were fitted with constrained Gaussian peaks which were linked to multiple competitive
radiative centres. Variations in the near band edge (NBE) to green defect
intensity ratios were also investigated to assist in the assignment of the defect peaks.
Incorporation of transition metals into ZnO was achieved through thermal in-diffusion
and sol-gel preparation methods. Significant quenching of the defect related optical
emissions relative to the UV emission was observed for both Mn doped samples,
while an enhancement of the defect emission was observed near the surface of Fe
doped crystals. Monochromatic CL imaging was shown to be an effective method
of determining the depth of iron incorporation in iron doped ZnO crystals owing to
the enhancement of the green emission.
Subjects/Keywords: Luminescence.; Nanowires.; Zinc oxide.
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Foley, M. (2011). Luminescence studies of ZnO crystals and nanowires. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/29858
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):
Foley, M. “Luminescence studies of ZnO crystals and nanowires.” 2011. Thesis, University of Technology, Sydney. Accessed December 15, 2019.
http://hdl.handle.net/10453/29858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Foley, M. “Luminescence studies of ZnO crystals and nanowires.” 2011. Web. 15 Dec 2019.
Vancouver:
Foley M. Luminescence studies of ZnO crystals and nanowires. [Internet] [Thesis]. University of Technology, Sydney; 2011. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/10453/29858.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Foley M. Luminescence studies of ZnO crystals and nanowires. [Thesis]. University of Technology, Sydney; 2011. Available from: http://hdl.handle.net/10453/29858
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
2.
Kaneti, Yusuf Valentino.
Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications.
Degree: Materials Science & Engineering, 2014, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/53563
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12260/SOURCE02?view=true
► Gas sensors are indispensable aspects of our life as it warns us about the dangerous gases in our environment. Semiconducting oxide gas sensors are by…
(more)
▼ Gas sensors are indispensable aspects of our life as it warns us about the dangerous gases in our environment. Semiconducting
oxide gas sensors are by far the most popular type of sensors, because of their simple processing and low fabrication cost. The early metal
oxide-based sensor materials however often exhibit several undesirable characteristics, such as poor selectivity, sensitivity to moisture, long-term signal drift and, slow response time. Hence, the development of fast-responding gas sensors with high sensitivity and selectivity is highly desirable. The introduction of nanotechnology has attracted large interests in gas-sensing research, largely because nanoscale particles offer a larger high surface area to volume ratio and enhanced functionalities compared to bulk particles. In particular, the synthesis of metal
oxide nanostructures with controlled morphology is highly attractive because the properties of nanostructure depend not only on their composition, but also on their structure, phase, shape, size, and size distribution. Many efforts have been carried out to improve the „3S‟: sensitivity, selectivity, and stability of semiconductor gas sensors by utilizing metal
oxide nanostructures. However, some challenges still exist in both synthesis and fundamental understanding of the gas-sensing mechanism of nanoscale metal oxides.This thesis aims to explore the use of nanostructures based on n-type semiconducting oxides as gas sensor materials for the detection of VOCs and to develop different ways to enhance the sensitivity of these metal
oxide nanostructures through means of structuraliiicontrol, surface engineering and introduction of additives such as metal oxides and noble metals. Our research method involves the use of various microscopy, diffraction, and spectroscopy techniques to characterize the achieved metal
oxide nanostructures or nanocomposites. To gain a further insights understanding of the metal
oxide/gas interactions during the sensing process, it is important to use multi-scale theoretical methods validated by experimental techniques. The findings will benefit the design and construction of gas sensors with desirable properties/performance (sensitivity, selectivity and stability) for potential applications in environmental monitoring and detection.
Advisors/Committee Members: Yu, Aibing, Materials Science & Engineering, Faculty of Science, UNSW, Jiang, Xuchuan, Materials Science & Engineering, Faculty of Science, UNSW.
Subjects/Keywords: Zinc oxide; Gas sensor; Nanostructures; Tin oxide; Nanocomposites; Metal oxide
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Kaneti, Y. V. (2014). Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53563 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12260/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Kaneti, Yusuf Valentino. “Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications.” 2014. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/53563 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12260/SOURCE02?view=true.
MLA Handbook (7th Edition):
Kaneti, Yusuf Valentino. “Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications.” 2014. Web. 15 Dec 2019.
Vancouver:
Kaneti YV. Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/53563 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12260/SOURCE02?view=true.
Council of Science Editors:
Kaneti YV. Synthesis and fundamental understanding of metal oxide nanostructures for gas-sensing applications. [Doctoral Dissertation]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/53563 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12260/SOURCE02?view=true

University of Western Australia
3.
Johnson, Clint Edwin.
In vitro toxicity assessment of silver and zinc oxide nanoparticles.
Degree: MS, 2009, University of Western Australia
URL: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=12961&local_base=GEN01-INS01
► Nanotoxicology is a nascent field of study concerned with the potential for nanotechnology to adversely impact human health or result in ecological damage. Nanomaterials can…
(more)
▼ Nanotoxicology is a nascent field of study concerned with the potential for nanotechnology to adversely impact human health or result in ecological damage. Nanomaterials can display unique physicochemical properties not present in the parent bulk material and it is these properties that may be a potential source of toxicity. There are a growing number of examples of nanomaterials functioning differently in biosystems compared to the parent bulk material. With the rapid growth of nanotechnology and increasing exposure of people to novel nanomaterials there is an urgent need to evaluate the toxicity of nanomaterials. In this study the toxicities of silver and zinc oxide nanoparticles were assessed. The effects of size and surface coating on the cytotoxicity and immunogenicity of silver nanoparticles were investigated, with cytotoxicity found to be inversely proportional to nanoparticle size. The subcutaneous penetration of zinc oxide nanoparticles was assessed to determine whether this material can be safely used as a UV filter in sunscreens and cosmetics. No dermal penetration was detected using a porcine in vitro model. Zinc oxide nanoparticles were also used as a model material to investigate nano-specific toxicity by comparing cytotoxicity and changes to gene expression with bulk scale zinc oxide. In both cases cytotoxicity and changes to gene expression were greater for zinc oxide nanoparticles. Methods and techniques to test the toxicity of nanomaterials in vitro and the implication for in vivo toxicity are only beginning to be elucidated. The methods and techniques used in this study, particularly nanomaterial stabilization in biofluids and toxicity testing using blood cell cultures, may assist the establishment of standard in vitro testing protocols for nanomaterials.
Nanotoxicology is a nascent field of study concerned with the potential for nanotechnology to adversely impact human health or result in ecological damage. Nanomaterials can display unique physicochemical properties not present in the parent bulk material and it is these properties that may be a potential source of toxicity. There are a growing number of examples of nanomaterials functioning differently in biosystems compared to the parent bulk material. With the rapid growth of nanotechnology and increasing exposure of people to novel nanomaterials there is an urgent need to evaluate the toxicity of nanomaterials. In this study the toxicities of silver and zinc oxide nanoparticles were assessed. The effects of size and surface coating on the cytotoxicity and immunogenicity of silver nanoparticles were investigated, with cytotoxicity found to be inversely proportional to nanoparticle size. The subcutaneous penetration of zinc oxide nanoparticles was assessed to determine whether this material can be safely used as a UV filter in sunscreens and cosmetics. No dermal penetration was detected using a porcine in vitro model. Zinc oxide nanoparticles were also used as a model material to investigate nano-specific toxicity by comparing…
Subjects/Keywords: Nanoparticles; Nanostructured materials; Nanotechnology; Silver; Toxicology; Zinc oxide; Nanotoxicology; Zinc oxide; Silver; Nanoparticles
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Johnson, C. E. (2009). In vitro toxicity assessment of silver and zinc oxide nanoparticles. (Masters Thesis). University of Western Australia. Retrieved from http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=12961&local_base=GEN01-INS01
Chicago Manual of Style (16th Edition):
Johnson, Clint Edwin. “In vitro toxicity assessment of silver and zinc oxide nanoparticles.” 2009. Masters Thesis, University of Western Australia. Accessed December 15, 2019.
http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=12961&local_base=GEN01-INS01.
MLA Handbook (7th Edition):
Johnson, Clint Edwin. “In vitro toxicity assessment of silver and zinc oxide nanoparticles.” 2009. Web. 15 Dec 2019.
Vancouver:
Johnson CE. In vitro toxicity assessment of silver and zinc oxide nanoparticles. [Internet] [Masters thesis]. University of Western Australia; 2009. [cited 2019 Dec 15].
Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=12961&local_base=GEN01-INS01.
Council of Science Editors:
Johnson CE. In vitro toxicity assessment of silver and zinc oxide nanoparticles. [Masters Thesis]. University of Western Australia; 2009. Available from: http://repository.uwa.edu.au:80/R/?func=dbin-jump-full&object_id=12961&local_base=GEN01-INS01

University of Technology, Sydney
4.
Moezzi, Amir.
Zinc oxide : new insights into a material for all ages.
Degree: 2012, University of Technology, Sydney
URL: http://hdl.handle.net/10453/20439
► Zinc oxide is an important material industrially and scientifically. It has a long history dating back to more than four thousand years ago. It has…
(more)
▼ Zinc oxide is an important material industrially and scientifically. It has a long history dating back to more than four thousand years ago. It has applications in rubber production, cosmetics, pigments and ceramics. The properties of zinc oxide such as porosity, specific surface area and optical properties change as a result of changing the synthetic method and process conditions. The suitability of ZnO for different applications depends on the properties of the material, which in turn are influenced by synthetic routes.
Knowledge of the processes underpinning the various synthetic techniques is key to understanding the properties of the ZnO end-product. In this work, various synthetic techniques have been investigated that may be amenable to large-scale production. The resultant materials were studied and important insights were obtained. For example, it was found that the precursor materials and method of processing for the production of zinc oxide have important roles in controlling the properties of the product such as specific surface area, crystal morphology, particle size and amount of surface hydroxyl groups embedded in the product.
In single-stage production methods, zinc oxide is precipitated directly from a zinc solution. Influences of reaction temperature, concentration of the reactants and feeding techniques on the properties of the products were determined.
In multi-stage routes, intermediate zinc-bearing materials including zinc peroxide and zinc hydroxy carbonate, sulphate, chloride, nitrate and acetate were synthesised. These intermediate materials were then used as precursors for the formation of zinc oxide particles. Relationships between the properties of the precursor zinc-containing compound and the end-product zinc oxide were studied and unexpected results were obtained. For example, it was shown that specific surface area of the zinc oxide product depends significantly on the precursor material from which it is produced. Techniques were investigated that can produce multiple important zinc-bearing compounds and it was found that it could be engineered by selection of the appropriate precursors and process conditions.
Subjects/Keywords: Zinc oxide.; Zinc hydroxy salts.; Synthesis.; Properties.; Applications.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moezzi, A. (2012). Zinc oxide : new insights into a material for all ages. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/20439
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):
Moezzi, Amir. “Zinc oxide : new insights into a material for all ages.” 2012. Thesis, University of Technology, Sydney. Accessed December 15, 2019.
http://hdl.handle.net/10453/20439.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Moezzi, Amir. “Zinc oxide : new insights into a material for all ages.” 2012. Web. 15 Dec 2019.
Vancouver:
Moezzi A. Zinc oxide : new insights into a material for all ages. [Internet] [Thesis]. University of Technology, Sydney; 2012. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/10453/20439.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Moezzi A. Zinc oxide : new insights into a material for all ages. [Thesis]. University of Technology, Sydney; 2012. Available from: http://hdl.handle.net/10453/20439
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University
5.
Mohammadtaheri,M.
TCNQ-based metal organic semiconducting hybrids as phototunable catalyst.
Degree: 2017, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:162199
► The ever-increasing demand to harvest solar light more efficiently has pushed the boundaries of research to develop new materials with superior light absorption properties. Considering…
(more)
▼ The ever-increasing demand to harvest solar light more efficiently has pushed the boundaries of research to develop new materials with superior light absorption properties. Considering that UV irradiation contributes to only 3% of the solar irradiation falling on the earth surface, conventional oxides such as TiO2 (band gap energy of 3.2 eV) absorb <5% of the solar spectrum. This suggests that traditional inorganic semiconductors may require transformational modifications to be suitable for practical applications. This outlines the need fabricate new catalysts with broad absorption capabilities across the UV–Vis–IR range of the solar spectrum. Additionally, easy fabrication and improving the availability of catalytically active sites would also enable rapid translation of such catalysts. For developing such catalysts, appropriate selection of semiconductors is required wherein the bandgap, chemical stability and light absorbing capabilities of each of these semiconductors and/ or metals is essential. The formation of junctions between two semiconductors or a semiconductor/metal has shown tremendous effect in influencing the photocatalytic activities of the semiconductors. In this regard, the current thesis outlines the fabrication of an organic charge transfer complex based on TCNQ using a simple and facile solution based approach. Combining these materials with either metals or other semiconductors improved their charge transfer properties leading to excellent catalysts. Growing such materials directly on high surface area cotton templates further allowed me to control the population of the junctions
Subjects/Keywords: Fields of Research; Catalysis; Metal-Semicounductor; TCNQ; Zinc Oxide; Photocatalysis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Mohammadtaheri,M. (2017). TCNQ-based metal organic semiconducting hybrids as phototunable catalyst. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162199
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mohammadtaheri,M. “TCNQ-based metal organic semiconducting hybrids as phototunable catalyst.” 2017. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:162199.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mohammadtaheri,M. “TCNQ-based metal organic semiconducting hybrids as phototunable catalyst.” 2017. Web. 15 Dec 2019.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Mohammadtaheri,M. TCNQ-based metal organic semiconducting hybrids as phototunable catalyst. [Internet] [Thesis]. RMIT University; 2017. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:162199.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mohammadtaheri,M. TCNQ-based metal organic semiconducting hybrids as phototunable catalyst. [Thesis]. RMIT University; 2017. Available from: http://researchbank.rmit.edu.au/view/rmit:162199
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Not specified: Masters Thesis or Doctoral Dissertation

University of Technology, Sydney
6.
Lee Cheong Lem, Laurent Olivier.
Spectroscopic studies of hydrogen dopants in ZnO crystals.
Degree: 2013, University of Technology, Sydney
URL: http://hdl.handle.net/10453/24204
► ZnO is a semiconductor with a direct band gap of 3:37 eV and an exciton binding energy of 60meV at room temperature. These properties make…
(more)
▼ ZnO is a semiconductor with a direct band gap of 3:37 eV and an exciton binding energy of 60meV at room temperature. These properties make it an attractive material for optoelectronic devices across a wide range of applications. Significant obstacles preventing the wide scale usage of ZnO include the lack of reliable p-type doping and high uncertainty surrounding the nature of its defects. Moreover, as-grown ZnO is intrinsically n-type and it is thought that hydrogen is the cause for the high n-type character.
The aim of this thesis is therefore to elucidate the role of hydrogen with respect to the optical and electrical properties of ZnO as well as its interaction with native defects and impurities.
During this work, hydrogen was introduced in ZnO single crystals through an RF plasma source. Hydrogen incorporation was confirmed by XPS measurements which showed an increase in hydrogenated oxygen states. Hydrogen also modified the near-surface region of the crystals only and not the bulk.
Hydrogen doped ZnO showed significant increases in the carrier concentration as well as in the near band edge (NBE) luminescence. This is attributed to hydrogen introducing new shallow donors. The green luminescence, whose origin is attributed to VZn, was quenched after hydrogen incorporation, indicating formation of neutral VZn-H2 complexes. The yellow luminescence in the as-received crystal is identical to that in Li doped ZnO and was assigned to recombinations involving LiZn.
Hydrogen doped ZnO also exhibits a negative thermal quenching (NTQ) of the NBE luminescence where the intensity of the luminescence increases with increasing temperature. Q-DLTS measurements detected new electronic states being created following hydrogen incorporation. A model involving the H-related state at 11meV releasing electrons to form free excitons is proposed to explain the NTQ behaviour.
XANES studies of H-doped ZnO showed that hydrogen interacted with oxygen states only but not zinc. This suggests that most of the hydrogen dopants introduced by plasma sit at the oxygen anti-bonding site.
The recombination kinetics of the various luminescence was investigated. While the kinetics of the NBE luminescence followed the expected behaviour for excitonic type recombination, the green and yellow luminescences showed high temperature dependencies and is explained in terms of different recombination mechanisms.a
Finally, it was found that hydrogen is stable under normal SEM excitation conditions.
Subjects/Keywords: ZnO.; Zinc oxide.; Cathodoluminescence.; Hydrogen.; Optoelectronics.; Electric properties.; Optical properties.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee Cheong Lem, L. O. (2013). Spectroscopic studies of hydrogen dopants in ZnO crystals. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/24204
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):
Lee Cheong Lem, Laurent Olivier. “Spectroscopic studies of hydrogen dopants in ZnO crystals.” 2013. Thesis, University of Technology, Sydney. Accessed December 15, 2019.
http://hdl.handle.net/10453/24204.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lee Cheong Lem, Laurent Olivier. “Spectroscopic studies of hydrogen dopants in ZnO crystals.” 2013. Web. 15 Dec 2019.
Vancouver:
Lee Cheong Lem LO. Spectroscopic studies of hydrogen dopants in ZnO crystals. [Internet] [Thesis]. University of Technology, Sydney; 2013. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/10453/24204.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lee Cheong Lem LO. Spectroscopic studies of hydrogen dopants in ZnO crystals. [Thesis]. University of Technology, Sydney; 2013. Available from: http://hdl.handle.net/10453/24204
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Melbourne
7.
Nicholas, Nathan Johann.
Control of ZnO crystal morphology through face specific adsorption.
Degree: 2011, University of Melbourne
URL: http://hdl.handle.net/11343/37258
► Many of the potential applications of ZnO are dependent upon either its overall shape (e.g. piezoelectric devices or LEDs), or the relative ratio of the…
(more)
▼ Many of the potential applications of ZnO are dependent upon either its overall shape (e.g. piezoelectric devices or LEDs), or the relative ratio of the different ZnO faces (e.g. catalysis). These applications have stimulated renewed interest in controlling the aspect ratio of ZnO crystals during their growth. One promising way to control the aspect ratio of ZnO crystals during hydrothermal growth is via the introduction of small organic molecules. Whilst there have been many studies showing that particular molecules affect ZnO crystal shape, few studies explain exactly how particular molecules influence growth. The overriding goal of the work contained in this thesis is to enhance understanding of how small organic molecules affect ZnO growth surfaces.
The first data section of this thesis investigates the mechanism for hydrothermal growth of ZnO in an ammonium hydroxide solution (a common synthesis condition). The products formed at 20−90°C and ambient pressure were characterised using Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photon Spectroscopy (XPS), X-ray Diffraction (XRD) and Secondary Ion Mass Spectroscopy (SIMS). Under these conditions, the growth of ZnO occurs via the initial precipitation of ε-Zn(OH)2 (Wülfingite), which subsequently dehydrates, to form Würtzite ZnO. Isotope tracking experiments show that most of the oxygen atoms do not mix with water during the conversion from Wülfingite to ZnO, and thus that the reaction proceeds via conversion in the solid phase, as well as dissolution and re-precipitation.
The dissolution of ZnO, which is the complementary process to growth, was then studied in situ using Atomic Force Microscopy (AFM) under alkaline conditions. The etching of the three native surfaces of ZnO,(0001), (000-1), and (10-10) was investigated. In aqueous NaOH solution the (0001) plane forms a stepped surface, whereas the (000-1) plane converts into more stable {10-1-1} planes. Dissolution of the (10-10) plane leaves a combination of {10-1-1} and (0001) planes with {10-11} risers. Dissolution in solutions containing both NaOH and trisodium citrate causes the (0001) plane steps to increase in number and reduce in height, and cause an overall increase in the rate of dissolution in the <10-10> directions. The stability of the (0001) and {10-1-1} planes is attributed to their lower average number of surface oxygens per zinc tetrahedra (1 and 1.5 respectively) than the (000-1) and {10-10} planes (both having 3). This is because Zn tetrahedra with a lower number of exposed surface oxygen are more difficult to convert into a soluble Zn species as the Zn-O-Zn bonds of the solid are not as exposed to solution. The formation of the meta-stable surfaces is caused by the dissolution of the edge of the plane.
The final section of this work large explored the adsorption of small organic molecules to single crystals of ZnO. Single crystals of ZnO were prepared…
Subjects/Keywords: zinc oxide; crystal growth; AFM; FTIR; dissolution; citrate
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nicholas, N. J. (2011). Control of ZnO crystal morphology through face specific adsorption. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/37258
Chicago Manual of Style (16th Edition):
Nicholas, Nathan Johann. “Control of ZnO crystal morphology through face specific adsorption.” 2011. Doctoral Dissertation, University of Melbourne. Accessed December 15, 2019.
http://hdl.handle.net/11343/37258.
MLA Handbook (7th Edition):
Nicholas, Nathan Johann. “Control of ZnO crystal morphology through face specific adsorption.” 2011. Web. 15 Dec 2019.
Vancouver:
Nicholas NJ. Control of ZnO crystal morphology through face specific adsorption. [Internet] [Doctoral dissertation]. University of Melbourne; 2011. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/11343/37258.
Council of Science Editors:
Nicholas NJ. Control of ZnO crystal morphology through face specific adsorption. [Doctoral Dissertation]. University of Melbourne; 2011. Available from: http://hdl.handle.net/11343/37258

University of New South Wales
8.
Al Assadi, Mohammad Hussein Naseef.
Diluted magnetic semiconductors for spin transistors.
Degree: Materials Science & Engineering, 2010, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/50403
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9291/SOURCE02?view=true
► Developing diluted magnetic semiconductors (DMSs) is an essential step toward the realization of spintronic devices where both the charge and the spin of the electrons…
(more)
▼ Developing diluted magnetic semiconductors (DMSs) is an essential step toward the realization of spintronic devices where both the charge and the spin of the electrons are manipulated. However the mechanism governing the magnetic interactions in these materials challenges our understanding of magnetism in solids. This challenge mainly lies in the complex interplay between magnetic ions of the DMSs and the intrinsic and extrinsic defects of the host materials. Another contributing factor is the inhomogeneous distribution of the doped magnetic ions in the host materials which leads to the unintentional formation of hetrostructures and secondary phases which adversely affect the magnetic properties of DMSs. In this dissertation, the magnetic interactions in the DMSs based on Mn, Co and Eu doped ZnO were studied using density functional theory methodology. Additionally, the effect of most common point defect in ZnO, i.e. oxygen vacancy and hydrogen impurity in Co doped ZnO oxides was considered. It was found that in the Mn and Co doped ZnO, there is a strong tendency among the magnetic ions to aggregate via oxygen and form variety of highly stable M-O-M (M stands for transition metals) complexes. Suchaggregation was not found to occur in Eu doped ZnO which implies more homogeneous doping pattern for Eu ions and possible achievement of intrinsic ferromagnetism in Eu doped ZnO.Magnetically, it was found that in all Co, Mn and Eu doped ZnO, no ferromagnetismcan be induced without an aid from another agent. Specifically, p-type carrier doping by nitrogen proved to establish carrier mediated ferromagnetism in both Mn and Co doped ZnO. Hydrogen contamination in both substitutional and interstitial sites could also open a channel for long range spin-spin interaction and led to room temperature ferromagnetism in Co doped ZnO. However the most stable defect in ZnO, oxygen vacancy did not contribute significantly to magnetism in Co doped ZnO. In Co doped ZnO, Eu codoping resulted in room temperature ferromagnetic alignment between Co and Eu ions and thus enhanced magnetization. As a result Eu and Co codoped ZnO was found to be the potential candidate for technological applications.
Advisors/Committee Members: Li, Sean, Materials Science & Engineering, Faculty of Science, UNSW, Zhang, Yuebin, Materials Science & Engineering, Faculty of Science, UNSW.
Subjects/Keywords: Zinc Oxide; Diluted Magnetic Semiconductors; Density Functional Theory
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Al Assadi, M. H. N. (2010). Diluted magnetic semiconductors for spin transistors. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/50403 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9291/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Al Assadi, Mohammad Hussein Naseef. “Diluted magnetic semiconductors for spin transistors.” 2010. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/50403 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9291/SOURCE02?view=true.
MLA Handbook (7th Edition):
Al Assadi, Mohammad Hussein Naseef. “Diluted magnetic semiconductors for spin transistors.” 2010. Web. 15 Dec 2019.
Vancouver:
Al Assadi MHN. Diluted magnetic semiconductors for spin transistors. [Internet] [Doctoral dissertation]. University of New South Wales; 2010. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/50403 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9291/SOURCE02?view=true.
Council of Science Editors:
Al Assadi MHN. Diluted magnetic semiconductors for spin transistors. [Doctoral Dissertation]. University of New South Wales; 2010. Available from: http://handle.unsw.edu.au/1959.4/50403 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:9291/SOURCE02?view=true

RMIT University
9.
Wong, W.
Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications.
Degree: 2013, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:160597
► Stringent gas monitoring of harmful gases associated with industrial activities has received considerable attention lately with the research and development of novel nanostructured semiconducting gas…
(more)
▼ Stringent gas monitoring of harmful gases associated with industrial activities has received considerable attention lately with the research and development of novel nanostructured semiconducting gas sensors. Zinc oxide (ZnO) nanostructures have shown electrical properties highly suitable for gas sensing, and can be manipulated with specific properties for desired applications; however, the adsorption of different molecules on the non-polar ZnO surfaces remain poorly understood. Ab-initio density functional theory (DFT) and some experimental techniques were used to study the electronic and structural properties of different gases on ZnO surfaces for gas sensing applications. The two low index non-polar ZnO surfaces, namely the (1010) and (2110) surfaces were studied as these are commonly found on different ZnO nanostructures. Nitrous oxide (N 2 O) and ethanol (CH 3 CH 2 OH) were adsorbed on each surface and the effect of surface facet, gas coverage, and the presence of surface defects (oxygen vacancies) was investigated. It was found that nitrous oxide physisorbed on both stoichiometric surfaces at 1 ML coverage, with evidence of weak chemisorption on the (2110) surface. Multiple stable structures were found with N 2 O adsorbing via the O or the terminal N atom to a surface Zn atom. The calculated charge transfer for each surface indicated that N 2 O behaves as a charge acceptor, withdrawing charge from the surface after adsorption, in line with other theoretical and experimental results. Ethanol also adsorbed in multiple stable orientations on the stoichiometric and defect surfaces at ¼, ½ and 1 ML coverages, with the binding being stronger than for adsorbed N 2 O. Ethanol can form two types of adsorbate-substrate interactions; one being between the ethanol O atom and a surface Zn atom; and the other being a hydrogen bond between the ethanol hydroxyl H atom and a surface O atom. The formation of a hydrogen bond stabilises the adsorbate-substrate interaction, and can be identified by a red shift in the adsorbate OH stretching mode. Due to the reduced number of surface oxygen atoms on the defect surfaces, the binding was weaker as either a hydrogen bond could not form or it was not as strong as on the stoichiometric surfaces. In contrast to nitrous oxide, ethanol was calculated to donate charge to the surface, behaving as a reducing gas. Experimentally, several characterisation techniques: Raman, Fourier Transform Infrared (FTIR) Spectroscopy and X-Ray Diffraction (XRD) were used to detect the presence of hydrogen gas (H 2 ) adsorbed on nanopowdered ZnO surfaces having a high proportion of the low index (1010) surface. We propose that the interaction of hydrogen gas on the ZnO surfaces can lead to the formation of surface hydroxyl groups, as was indicated by the FTIR spectroscopy. The presence of hydrogen was not observed for highly crystalline ZnO nanopowders with larger grain sized, while for smaller grain sized powders, clear peak shifts confirm the presence of hydrogen. Our…
Subjects/Keywords: Fields of Research; Density functional theory; adsorption; zinc oxide; gas sensing; FTIR; XRD; Raman; nanomaterials; ethanol; nitrous oxide; hydrogen
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wong, W. (2013). Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:160597
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):
Wong, W. “Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications.” 2013. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:160597.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wong, W. “Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications.” 2013. Web. 15 Dec 2019.
Vancouver:
Wong W. Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications. [Internet] [Thesis]. RMIT University; 2013. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:160597.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wong W. Theoretical and experimental study of the interaction of small molecules with metal oxide surfaces for sensing applications. [Thesis]. RMIT University; 2013. Available from: http://researchbank.rmit.edu.au/view/rmit:160597
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
10.
Yang, Chien-Jen.
Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics.
Degree: Photovoltaics & Renewable Energy Engineering, 2015, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/55675
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:38411/SOURCE02?view=true
► Silicon quantum dots (QDs), a subset of Si nanocrystals (NCs), in dielectric matrices with bandgap tunability are promising thin film materials for third generation photovoltaics,…
(more)
▼ Silicon quantum dots (QDs), a subset of Si nanocrystals (NCs), in dielectric matrices with bandgap tunability are promising thin film materials for third generation photovoltaics, which aim to cost effectively exceed the Shockley-Queisser limit of efficiency. The Si QDs investigated in this thesis were fabricated by magnetron sputtered thin film superlattice bilayers of silicon rich
oxide (SRO) and silicon dioxide (SiO2) followed by annealing at 1100 °C. The annealing causes solid-state nucleation and subsequent formation of Si NCs in the SRO layers. However, the main issue with this type of Si NC material is its poor carrier transport and material quality. Solar cell devices in the past have experienced heavy current crowding and high series resistance despite their reasonable open-circuit voltages up to 492 mV. Aluminium doped
zinc oxide (AZO) is a promising transparent conducting
oxide (TCO) which is often used in thin-film solar cells as transparent contacts. From the literature surveyed, AZO has never been used to make Si NC solar cell devices before. The key advantage of AZO is its high melting point of 1975 °C, which is much higher than other common TCOs. This allows AZO to be annealed at 1100 °C together with the SRO/SiO2 bilayers, although the structural, electrical and optical properties of the AZO thin films change after annealing. The main issue is the heavy decrease in conductivity and cross-diffusion of elements.For the first time, nucleation of Si NCs in SRO/SiO2 bilayers was observed in real-time via an aberration-corrected high resolution transmission electron microscope with in situ heating up to 600 °C. This particular experiment showed that nucleation of Si NCs begins at an unexpectedly low temperature (450 °C) which suggests that ex situ annealing at 1100 °C may not be necessary. However, through external furnace annealing temperature dependence experiments later it was shown that the higher the annealing temperature, the better the extent of crystallisation of the Si NCs. The advantages of high Si content SRO/SiO2 bilayer superlattices with boron and phosphorus doping were also investigated. It was also shown that AZO forms a good ohmic contact to both the high Si content B and P doped SRO/SiO2 bilayer superlattices. Finally, together with utilising AZO as a transparent contact, a prototype superstrate configured Si NC solar cell device is demonstrated.
Advisors/Committee Members: Conibeer, Gavin, Photovoltaics & Renewable Energy Engineering, Faculty of Engineering, UNSW, Perez-Wurfl, Ivan, Photovoltaics & Renewable Energy Engineering, Faculty of Engineering, UNSW, Green, Martin, Photovoltaics & Renewable Energy Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Aluminium doped zinc oxide; Silicon quantum dots; Silicon nanocrystals; Transparent conducting oxide; Third generation photovoltaics; All-Si tandem cell
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yang, C. (2015). Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/55675 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:38411/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Yang, Chien-Jen. “Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics.” 2015. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/55675 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:38411/SOURCE02?view=true.
MLA Handbook (7th Edition):
Yang, Chien-Jen. “Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics.” 2015. Web. 15 Dec 2019.
Vancouver:
Yang C. Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/55675 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:38411/SOURCE02?view=true.
Council of Science Editors:
Yang C. Transparent conducting aluminium doped zinc oxide for silicon quantum dot solar cell devices in third generation photovoltaics. [Doctoral Dissertation]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/55675 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:38411/SOURCE02?view=true

RMIT University
11.
Aloe, C.
Enhancing wound repair with marine natural products and nanoparticles.
Degree: 2017, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:162257
► Wound repair is a highly ordered biological process that is essential for the maintenance of the skin’s barrier function. For optimal healing, the inflammatory, proliferative…
(more)
▼ Wound repair is a highly ordered biological process that is essential for the maintenance of the skin’s barrier function. For optimal healing, the inflammatory, proliferative and remodelling phases of repair must occur in the correct sequence with appropriate stimuli to prevent insufficient or excessive activity at critical stages. The inflammatory and proliferative phases of repair can influence both the rate of wound resolution and the skin physiology of newly resolved tissue and subsequent remodelling. Optimisation of these processes has the potential to both enhance closure rate and minimise microorganism colonisation, reduce scarring and enhance wound tensile strength. There are many local and systemic factors that can severely impede healing and promote wound progression from an acute to a chronic state. This is particularly evident in the elderly whom are prone to various comorbidities that can influence the immune, circulatory and respiratory systems and often rely on medical intervention to assist healing. In recent decades the anti-inflammatory and antioxidant properties of marine natural products (MNPs) have attained global attention due to their potential implications for human health. Omega-3 fatty acid enriched oils (carbon dioxide and dimethyl ether extracted oils; CO2 and DME oil) extracted from the New Zealand green lipped mussel, Perna canaliculus, have demonstrated potent anti-inflammatory properties. 5β-scymnol, a shark bile sterol, is another MNP with beneficial health implications due to its potent antioxidant abilities. However, the wound healing potential of these MNPs remains broadly unknown. In this study, the effects of these three MNPs on the inflammatory and proliferative phase of repair were explored in vitro. Results indicated that the two marine oils demonstrated inhibition of the pro-inflammatory metabolites of the 5-lipoxygenase and cyclooxygenase pathways in a dose-dependent manner, but did not stimulate keratinocyte or fibroblast growth. Similarly, 5β-scymnol displayed no effect on the growth of keratinocytes and fibroblasts, but was also shown to inhibit cyclooxygenase metabolite production. Of equal interest is the recent application of natural and synthetic biomaterials in tissue engineering and wound healing. Wound healing products containing nano-silver – primarily used for its antimicrobial properties – are currently utilised for wound management. However, other metal oxide nanoparticles (NPs), including zinc oxide (ZnO), have not been sufficiently tested for their ability to aid healing. In the second arm of this study, the effects of the ZnO NPs were similarly assessed in vitro. The ZnO NPs significantly enhanced scratch closure in human keratinocyte monolayer cultures in a dose- and particle size-dependent manner, while larger ZnO particulates were less effective. Furthermore, examination of surfactant-dispersed ZnO NPs revealed that the agglomeration state of the material was an important characteristic. Additionally,…
Subjects/Keywords: Fields of Research; Wound repair; Marine natural products; Nanoparticles; Zinc oxide; Keratinocytes
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aloe, C. (2017). Enhancing wound repair with marine natural products and nanoparticles. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162257
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):
Aloe, C. “Enhancing wound repair with marine natural products and nanoparticles.” 2017. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:162257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aloe, C. “Enhancing wound repair with marine natural products and nanoparticles.” 2017. Web. 15 Dec 2019.
Vancouver:
Aloe C. Enhancing wound repair with marine natural products and nanoparticles. [Internet] [Thesis]. RMIT University; 2017. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:162257.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aloe C. Enhancing wound repair with marine natural products and nanoparticles. [Thesis]. RMIT University; 2017. Available from: http://researchbank.rmit.edu.au/view/rmit:162257
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Technology, Sydney
12.
Coutts, Michael John.
Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography.
Degree: 2016, University of Technology, Sydney
URL: http://hdl.handle.net/10453/62406
► Nanosphere lithography was used to synthesise nanoscale capacitors as well as arrays of zinc oxide nanostructures. Close-packed polystyrene nanospheres were used as masks and periodic…
(more)
▼ Nanosphere lithography was used to synthesise nanoscale capacitors as well as arrays of zinc oxide nanostructures. Close-packed polystyrene nanospheres were used as masks and periodic arrays of metals / metal oxides were deposited through the inter-sphere voids onto substrates. The technique was optimised to produce hexagonally close-packed arrays of polystyrene spheres for a range of sphere sizes (200-1500 nm). Nanoscale capacitors were synthesised via evaporative and sputter deposition to produce structures consisting of gold / metal oxide / gold layers on a silicon substrate. A range of metal oxides were investigated including alumina, silica, zinc oxide, titania and hafnia. A significant development reported here involves the charging of these devices and their characterisation using scanning electron microscopy techniques. These methods enable the measurement of the charging time constants of materials in a non-destructive fashion without the requirement to connect wires or contacts. Nanostructures fabricated using zinc oxide as a dielectric material produced rings of zinc oxide nanostructures on the silicon substrate and a mechanism for the ring formation is proposed here. The resultant structures were used as templates to seed the hydrothermal growth of zinc oxide nanostructures. Arrays of zinc oxide nanostructures were also produced using techniques that enable control over the position and amount of growth.
Subjects/Keywords: Nanosphere lithography.; Nanoscale capacitors.; Zinc oxide nanostructures.; Polystyrene spheres.; Hexagonally close-packed arrays.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Coutts, M. J. (2016). Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/62406
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):
Coutts, Michael John. “Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography.” 2016. Thesis, University of Technology, Sydney. Accessed December 15, 2019.
http://hdl.handle.net/10453/62406.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Coutts, Michael John. “Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography.” 2016. Web. 15 Dec 2019.
Vancouver:
Coutts MJ. Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography. [Internet] [Thesis]. University of Technology, Sydney; 2016. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/10453/62406.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Coutts MJ. Fabrication and properties of nanocapacitors and nanostructures prepared by nanosphere lithography. [Thesis]. University of Technology, Sydney; 2016. Available from: http://hdl.handle.net/10453/62406
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University
13.
Aloe, C.
Enhancing wound repair with marine natural products and nanoparticles.
Degree: 2017, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:162258
► Wound repair is a highly ordered biological process that is essential for the maintenance of the skin’s barrier function. For optimal healing, the inflammatory, proliferative…
(more)
▼ Wound repair is a highly ordered biological process that is essential for the maintenance of the skin’s barrier function. For optimal healing, the inflammatory, proliferative and remodelling phases of repair must occur in the correct sequence with appropriate stimuli to prevent insufficient or excessive activity at critical stages. The inflammatory and proliferative phases of repair can influence both the rate of wound resolution and the skin physiology of newly resolved tissue and subsequent remodelling. Optimisation of these processes has the potential to both enhance closure rate and minimise microorganism colonisation, reduce scarring and enhance wound tensile strength. There are many local and systemic factors that can severely impede healing and promote wound progression from an acute to a chronic state. This is particularly evident in the elderly whom are prone to various comorbidities that can influence the immune, circulatory and respiratory systems and often rely on medical intervention to assist healing. In recent decades the anti-inflammatory and antioxidant properties of marine natural products (MNPs) have attained global attention due to their potential implications for human health. Omega-3 fatty acid enriched oils (carbon dioxide and dimethyl ether extracted oils; CO2 and DME oil) extracted from the New Zealand green lipped mussel, Perna canaliculus, have demonstrated potent anti-inflammatory properties. 5β-scymnol, a shark bile sterol, is another MNP with beneficial health implications due to its potent antioxidant abilities. However, the wound healing potential of these MNPs remains broadly unknown. In this study, the effects of these three MNPs on the inflammatory and proliferative phase of repair were explored in vitro. Results indicated that the two marine oils demonstrated inhibition of the pro-inflammatory metabolites of the 5-lipoxygenase and cyclooxygenase pathways in a dose-dependent manner, but did not stimulate keratinocyte or fibroblast growth. Similarly, 5β-scymnol displayed no effect on the growth of keratinocytes and fibroblasts, but was also shown to inhibit cyclooxygenase metabolite production. Of equal interest is the recent application of natural and synthetic biomaterials in tissue engineering and wound healing. Wound healing products containing nano-silver – primarily used for its antimicrobial properties – are currently utilised for wound management. However, other metal oxide nanoparticles (NPs), including zinc oxide (ZnO), have not been sufficiently tested for their ability to aid healing. In the second arm of this study, the effects of the ZnO NPs were similarly assessed in vitro. The ZnO NPs significantly enhanced scratch closure in human keratinocyte monolayer cultures in a dose- and particle size-dependent manner, while larger ZnO particulates were less effective. Furthermore, examination of surfactant-dispersed ZnO NPs revealed that the agglomeration state of the material was an important characteristic. Additionally,…
Subjects/Keywords: Fields of Research; Wound repair; Marine natural products; Nanoparticles; Zinc oxide; Keratinocytes
Record Details
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Cite
Share »
Record Details
Similar Records
Cite
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aloe, C. (2017). Enhancing wound repair with marine natural products and nanoparticles. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162258
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):
Aloe, C. “Enhancing wound repair with marine natural products and nanoparticles.” 2017. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:162258.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Aloe, C. “Enhancing wound repair with marine natural products and nanoparticles.” 2017. Web. 15 Dec 2019.
Vancouver:
Aloe C. Enhancing wound repair with marine natural products and nanoparticles. [Internet] [Thesis]. RMIT University; 2017. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:162258.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Aloe C. Enhancing wound repair with marine natural products and nanoparticles. [Thesis]. RMIT University; 2017. Available from: http://researchbank.rmit.edu.au/view/rmit:162258
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queensland University of Technology
14.
Chang, Jin.
Controlled synthesis of inorganic semiconductor nanocrystals and their applications.
Degree: 2013, Queensland University of Technology
URL: https://eprints.qut.edu.au/63960/
► This thesis is a comprehensive study of the synthesis of nanomaterials. It explores the synthetic methods on the control of the size, shape and phase…
(more)
▼ This thesis is a comprehensive study of the synthesis of nanomaterials. It explores the synthetic methods on the control of the size, shape and phase of semiconductor nanocrystals. A number of important conclusions, including the mechanism behind crystal growth and the structure-relationship, have been drawn through the experimental and theoretical investigation. The synthesized nanocrystals have been tested for applications in gas sensing, photocatalysis and solar cells, which exhibit considerable commercialization potential.
Subjects/Keywords: controlled synthesis; nanocrystals; semiconductors; zinc oxide; copper chalcogenide; gas sensors; photocatalysis; solar photovoltaic
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chang, J. (2013). Controlled synthesis of inorganic semiconductor nanocrystals and their applications. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/63960/
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):
Chang, Jin. “Controlled synthesis of inorganic semiconductor nanocrystals and their applications.” 2013. Thesis, Queensland University of Technology. Accessed December 15, 2019.
https://eprints.qut.edu.au/63960/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chang, Jin. “Controlled synthesis of inorganic semiconductor nanocrystals and their applications.” 2013. Web. 15 Dec 2019.
Vancouver:
Chang J. Controlled synthesis of inorganic semiconductor nanocrystals and their applications. [Internet] [Thesis]. Queensland University of Technology; 2013. [cited 2019 Dec 15].
Available from: https://eprints.qut.edu.au/63960/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chang J. Controlled synthesis of inorganic semiconductor nanocrystals and their applications. [Thesis]. Queensland University of Technology; 2013. Available from: https://eprints.qut.edu.au/63960/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queensland University of Technology
15.
English, Michael David.
Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride.
Degree: 2012, Queensland University of Technology
URL: https://eprints.qut.edu.au/51084/
► The possibility of a surface inner sphere electron transfer mechanism leading to the coating of gold via the surface reduction of gold(I) chloride on metal…
(more)
▼ The possibility of a surface inner sphere electron transfer mechanism leading to the coating of gold via the surface reduction of gold(I) chloride on metal and semi-metal
oxide nanoparticles was investigated. Silica and
zinc oxide nanoparticles are known to have very different surface chemistry, potentially leading to a new class of gold coated nanoparticles.
Monodisperse silica nanoparticles were synthesised by the well known Stöber protocol in conjunction with sonication. The nanoparticle size was regulated solely by varying the amount of ammonia solution added. The presence of surface hydroxyl groups was investigated by liquid proton NMR. The resultant nanoparticle size was directly measured by the use of TEM.
The synthesised silica nanoparticles were dispersed in acetonitrile (MeCN) and added to a bis acetonitrile gold(I) co-ordination complex [Au(MeCN)2]+ in MeCN. The silica hydroxyl groups were deprotonated in the presence of MeCN generating a formal negative charge on the siloxy groups. This allowed the [Au(MeCN)2]+ complex to undergo ligand exchange with the silica nanoparticles, which formed a surface co-ordination complex with reduction to gold(0), that proceeded by a surface inner sphere electron transfer mechanism. The residual [Au(MeCN)2]+ complex was allowed to react with water, disproportionating into gold(0) and gold(III) respectively, with gold(0) being added to the reduced gold already bound on the silica surface. The so-formed metallic gold seed surface was found to be suitable for the conventional reduction of gold(III) to gold(0) by ascorbic acid. This process generated a thin and uniform gold coating on the silica nanoparticles.
This process was modified to include uniformly gold coated composite
zinc oxide nanoparticles (
[email protected] NPs) using surface co-ordination chemistry. AuCl dissolved in acetonitrile (MeCN) supplied chloride ions which were adsorbed onto ZnO NPs. The co-ordinated gold(I) was reduced on the ZnO surface to gold(0) by the inner sphere electron transfer mechanism. Addition of water disproportionated the remaining gold(I) to gold(0) and gold(III). Gold(0) bonded to gold(0) on the NP surface with gold(III) was reduced to gold(0) by ascorbic acid (ASC), which completed the gold coating process.
This gold coating process of
[email protected] NPs was modified to incorporate iodide instead of chloride. ZnO NPs were synthesised by the use of sodium
oxide,
zinc iodide and potassium iodide in refluxing basic ethanol with iodide controlling the presence of chemisorbed oxygen. These ZnO NPs were treated by the addition of gold(I) chloride dissolved in acetonitrile leaving chloride anions co-ordinated on the ZnO NP surface. This allowed acetonitrile ligands in the added [Au(MeCN)2]+ complex to surface exchange with adsorbed chloride from the dissolved AuCl on the ZnO NP surface. Gold(I) was then reduced by the surface inner sphere electron transfer mechanism. The presence of the reduced gold on the ZnO NPs allowed adsorption of iodide to generate a uniform deposition of gold onto the ZnO NP…
Subjects/Keywords: gold coated silica nanoparticles; gold coated zinc oxide nanoparticles; Surface Enhanced Raman Spectroscopy (SERS)
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APA (6th Edition):
English, M. D. (2012). Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/51084/
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):
English, Michael David. “Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride.” 2012. Thesis, Queensland University of Technology. Accessed December 15, 2019.
https://eprints.qut.edu.au/51084/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
English, Michael David. “Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride.” 2012. Web. 15 Dec 2019.
Vancouver:
English MD. Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride. [Internet] [Thesis]. Queensland University of Technology; 2012. [cited 2019 Dec 15].
Available from: https://eprints.qut.edu.au/51084/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
English MD. Gold coating of silica and zinc oxide nanoparticles by the surface reduction of gold(I) chloride. [Thesis]. Queensland University of Technology; 2012. Available from: https://eprints.qut.edu.au/51084/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University
16.
Tran, H.
Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials.
Degree: 2019, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:162720
► This thesis describes the deposition, characterisation and device applications of amorphous zinc tin oxide (a-ZTO) and carbon-based materials using energetic deposition techniques. The study aimed…
(more)
▼ This thesis describes the deposition, characterisation and device applications of amorphous zinc tin oxide (a-ZTO) and carbon-based materials using energetic deposition techniques. The study aimed to explore the suitability of this growth method in producing highquality carbon and a-ZTO films for device applications. Technology Computer Aided Design (TCAD) simulations were also conducted in tandem with experiments to identify critical parameters affecting device behaviour and to provide guidance for improved device performance. Firstly, electrical carbon contacts to n-type 6H-SiC were energetically deposited from a filtered cathodic vacuum arc (FCVA) at room temperature and elevated temperature with low and high biases. Lower energy (< 100 eV) in the carbon flux resulted in resistive amorphous carbon contacts. As the deposition energy and sp2 bonding (graphitic) fraction were increased, an oriented graphitic microstructure developed and rectifying electrical characteristics emerged. TCAD simulations revealed the effects of interfacial layers and contact work functions on the device performance and suggested that the rectification ratios of C/6H-SiC Schottky diodes could be increased by improving the lateral homogeneity of the junctions and/or by controlling the thickness of interfacial layers. Secondly, thin films of amorphous zinc tin oxide (a-ZTO) were energetically deposited using high power impulse magnetron sputtering (HiPIMS). HiPIMS and DC magnetron sputtering modes were enabled to co-deposit an a-ZTO layer with Zn:Sn ratio that varied laterally across a 4-inch diameter sapphire substrate. Electrical, structural and optical properties of the films were investigated as a function of composition. The as-deposited films were found to be amorphous, transparent and highly resistive with little variation in the Zn:Sn ratios. Annealing in the presence of hydrogen yielded improved film conductivity and measured carrier concentrations of ~ 1017 cm-3 . Hall mobilities of up to 13 cm2 /V.s were also measured in the ntype films. These findings suggest that HiPIMS can produce dense, high quality a-ZTO suitable for device applications. As a transparent amorphous conducting oxide with high transparency and good electron mobility, a-ZTO has proven applications in interconnects and thin film transistors. In this thesis, the potential for this material in ‘next-generation’ signal processing devices is discussed. Specifically, the ability of the material to support resistive switching and memristive phenomena was investigated in lateral memristors on HiPIMS a-ZTO. The transport mechanisms and conductance of Ag/a-ZTO memristors were found to depend on prior activity and on the imposed current limit, mimicking biology synaptic plasticity. After microscopy, the switching mechanism was attributed to nanoscale filaments formed between the electrodes. These filaments were subject to Rayleigh instability and exhibited relaxation times determined by their effective radii.
Subjects/Keywords: Fields of Research; carbon; metal oxides; TCAD modelling; energetic deposition; amorphous zinc tin oxide
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tran, H. (2019). Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:162720
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):
Tran, H. “Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials.” 2019. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:162720.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tran, H. “Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials.” 2019. Web. 15 Dec 2019.
Vancouver:
Tran H. Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials. [Internet] [Thesis]. RMIT University; 2019. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:162720.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tran H. Fabrication, characterisation and modelling of electronic devices based on amorphous metal-oxide and carbonaceous materials. [Thesis]. RMIT University; 2019. Available from: http://researchbank.rmit.edu.au/view/rmit:162720
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

RMIT University
17.
Esmaiel Zadeh Kandjani, A.
Zinc oxide based nano-composites for multifunctional applications.
Degree: 2014, RMIT University
URL: http://researchbank.rmit.edu.au/view/rmit:161475
► Most of the spectroscopic and other analytical sensing technologies get frequently interfered from the instrumental noise and background in the spectra. Especially scattering based technique…
(more)
▼ Most of the spectroscopic and other analytical sensing technologies get frequently interfered from the instrumental noise and background in the spectra. Especially scattering based technique such as Surface Enhanced Raman Spectroscopy (SERS), where the Raman scattering signal component often has significant contributions from the background and noise, and therefore needs a proper removal of these unfavourable components from the signals. As the sensing technique in this thesis was based on SERS method, in this research a new methodology has been introduced to answer the needs for more reliable background correction for ultrahigh sensitive nanosensing applications. Photocatalytic activities of zinc oxide nano-arrays and ability of integrating this property with the other useful applications like biological and chemical sensing can bring a variety of novel applications. The controllable synthesis of this material with desired physical parameters, different substrates and also their ability to form heterojunction with the highest controllability are some of the advantages of using these nanostructures for different applications. These arrays have shown a good reproducibility and morphological control during synthesis procedure which makes them interesting materials to be used as SERS based sensing substrates in order to obtain higher reproducibility and sensitivity. Also, as zinc oxide is a photocatalyst, using this material can give broader functionality to the sensing platform. Not only can it make the senso re-generable, but also, it can be used for removing the heavy metal ions from the water. The combination of ZnO/Ag nano-arrays can make dual sensing ability of biological sensing and selective Hg2+ sensing abilities. Organic semiconductors have attracted many researchers’ attention as they are easy to control based on the band-gap, thus opening new applications where the inorganic semiconductors fail to operate. In addition, the heterojunction formation between organic and inorganic semiconductors can bring more possibilities and opportunities for developing new optoelectronics devices. In this regard, decorating silver nanostructures on the surface of an inorganic semiconductor can bring other functionalities to n-type ZnO nanostructures as Ag can be easily changed to metal-organic semiconductor molecule of AgTCNQ. The method for fabricating reproducible and simple approach to syntheses of inorganic-organic hybrids of AgTCNQ-ZnO (p-n heterojunction) was another aim of this research. In this thesis, this heterojunction has been synthesized and studied for increasing the activities of ZnO photocatalyst, where proposed method can be extended for synthesis of other controlled heterojunctions. The work presented in this thesis focuses on fine-tuning the morphology of ZnO semiconductors and preparing functional materials such as ZnO-metal and ZnO-organic semiconductor hybrids. Applications of these materials in photocatalytic degradation of environmental pollutants and sensing of ecotoxic chemical species are…
Subjects/Keywords: Fields of Research; Zinc Oxide; AgTCNQ; Photocatalysis; Surface Enhanced Raman Spectroscopy; Background correction; Mercury sensing; Mercury removal; p-n Junction
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Esmaiel Zadeh Kandjani, A. (2014). Zinc oxide based nano-composites for multifunctional applications. (Thesis). RMIT University. Retrieved from http://researchbank.rmit.edu.au/view/rmit:161475
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):
Esmaiel Zadeh Kandjani, A. “Zinc oxide based nano-composites for multifunctional applications.” 2014. Thesis, RMIT University. Accessed December 15, 2019.
http://researchbank.rmit.edu.au/view/rmit:161475.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Esmaiel Zadeh Kandjani, A. “Zinc oxide based nano-composites for multifunctional applications.” 2014. Web. 15 Dec 2019.
Vancouver:
Esmaiel Zadeh Kandjani A. Zinc oxide based nano-composites for multifunctional applications. [Internet] [Thesis]. RMIT University; 2014. [cited 2019 Dec 15].
Available from: http://researchbank.rmit.edu.au/view/rmit:161475.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Esmaiel Zadeh Kandjani A. Zinc oxide based nano-composites for multifunctional applications. [Thesis]. RMIT University; 2014. Available from: http://researchbank.rmit.edu.au/view/rmit:161475
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide
18.
Milani, Narges.
Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability.
Degree: 2012, University of Adelaide
URL: http://hdl.handle.net/2440/82374
► Zinc oxide nanoparticles (ZnO NPs) have unique physical and chemical characteristics which deviate from larger particles of the same material, due to their extremely small…
(more)
▼ Zinc oxide nanoparticles (ZnO NPs) have unique physical and chemical characteristics which deviate from larger particles of the same material, due to their extremely small size, higher specific surface area and surface reactivity. The peculiar properties of ZnO NPs could potentially improve
zinc (Zn) fertilizers for sustainable agriculture. This is based on the assumption that ZnO NPs provide a more soluble and bioavailable source of Zn in soil compared to micron- or millimetre- sized (bulk) ZnO particles currently used for Zn fertilizers in Zn deficient soils. However, a thorough understanding of the fate and reactions in soils and interactions of nanoparticles with plants of ZnO NPs is required prior to the recommendation for use of these novel materials. Therefore, there is a need to investigate dissolution, diffusion, transformation, partitioning and availability of manufactured ZnO NPs in soil to ensure safer and more sustainable application of ZnO NPs as a new source of Zn fertilisers for plants, and better management of their potential risks. Given inclusion of Zn in macronutrient fertilizers is the common procedure for their field application, ZnO NPs and bulk ZnO were coated onto macronutrient fertilizers (monoammonium phosphate (MAP) and urea) and dissolution kinetics, diffusion and solid phase speciation of Zn from coated fertilizers were evaluated. Coating of ZnO on macronutrient fertilizers significantly affected solubility and dissolution kinetics of the ZnO sources, but nano-sized ZnO did not show any enhanced solubility over bulk ZnO. The low pH value of ZnO-coated MAP granules resulted in greater and faster dissolution of ZnO compared to ZnO-coated urea granules. However, interactions of ZnO particles with phosphate in MAP granules likely resulted in precipitation of Zn-phosphate species. The high pH and ionic strength of the dissolving solution resultant from hydrolysis of urea likely promoted aggregation of any ZnO NPs released from coated urea granules and also hindered dissolution of ZnO. To evaluate changes in Zn speciation with coating of the ZnO sources and after incorporation of the coated-fertilizers into an alkaline calcareous soil, synchrotron-based micro X-ray absorption fine structure (μ-XAFS) method was used. The findings confirmed precipitation of Zn-phosphate species at the surface of MAP fertilizer granules irrespective of the size of ZnO particles used for coating. For coated urea, the Zn remained as ZnO species for both nano-sized and bulk ZnO coatings. Solid phase speciation in the fertilized soil varied with distance from the point of fertilizer application. Significant amounts of Zn(OH)₂ and ZnCO₃ species were identified in the soil some distance from coated urea and MAP, respectively, indicating dissolution/precipitation processes were active. Moreover, limited and comparable diffusion of Zn from coated fertilizers with nanoparticulate or bulk ZnO into soil was observed using micro x-ray fluorescence mapping (μ-XRF). Transformation of Zn at the surface of MAP granules, mass…
Advisors/Committee Members: McLaughlin, Michael John (advisor), Kirby, Jason K. (advisor), Beak, Douglas Gerald (advisor), School of Agriculture, Food and Wine (school).
Subjects/Keywords: zinc oxide nanoparticles; dissolution kinetics; Zn solid phase speciation; Zn diffusion; Zn availability; Zn fertilizers; Zn fertilisers; Zn partitioning
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Milani, N. (2012). Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/82374
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):
Milani, Narges. “Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability.” 2012. Thesis, University of Adelaide. Accessed December 15, 2019.
http://hdl.handle.net/2440/82374.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Milani, Narges. “Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability.” 2012. Web. 15 Dec 2019.
Vancouver:
Milani N. Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability. [Internet] [Thesis]. University of Adelaide; 2012. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/2440/82374.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Milani N. Zinc oxide nanoparticles in the soil environment : dissolution, speciation, retention and bioavailability. [Thesis]. University of Adelaide; 2012. Available from: http://hdl.handle.net/2440/82374
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
19.
Song, Dengyuan.
Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications.
Degree: Centre for Photovoltaic Engineering, 2005, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/29371
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1401/SOURCE01?view=true
► Transparent conductive oxides (TCOs) and polycrystalline silicon (poly-Si) thin-filmsare very promising for application in photovoltaics. It is extremely challenging to developcheap TCOs and poly-Si films…
(more)
▼ Transparent conductive oxides (TCOs) and polycrystalline silicon (poly-Si) thin-filmsare very promising for application in photovoltaics. It is extremely challenging to developcheap TCOs and poly-Si films to make photovoltaic devices. The aim of this thesis is tostudy sputtered aluminum-doped ZnO TCO and poly-Si films by solid-phasecrystallization (SPC) for application in low-cost photovoltaics. The investigated aspectshave been (i) to develop and characterize sputtered aluminum-doped ZnO (ZnO:Al) filmsthat can be used as a TCO material on crystalline silicon solar cells, (ii) to explore thepotential of the developed ZnO:Al films for application in ZnO:Al/c-Si heterojunctionsolar cells, (iii) to make and characterize poly-Si thin-films on different kinds of glasssubstrates by SPC using electron-beam evaporated amorphous silicon (a-Si) [referred toas EVA poly-Si material (SPC of evaporated a-Si)], and (iv) to fabricate EVA poly-Sithin-film solar cells on glass and improve the energy conversion efficiency of these cellsby post-crystallization treatments.The ZnO:Al work in this thesis is focused on the correlation between film characteristicsand deposition parameters, such as rf sputter power (Prf), working gas pressure (Pw), andsubstrate temperature (Tsub), to get a clear picture of film properties in the optimizedconditions for application in photovoltaic devices. Especially the laterally non-uniformfilm properties resulting from the laterally inhomogeneous erosion of the target materialare investigated in detail. The influence of Prf, Pw and Tsub on the structural, electrical,optical and surface morphology properties of ZnO:Al films is discussed. It is found thatthe lateral variations of the parameters of ZnO:Al films prepared by rf magnetronsputtering can be reduced to acceptable levels by optimising the deposition parameters.ZnO:Al/c-Si heterojunction solar cells are fabricated and characterized to demonstratethe feasibility of the fabricated ZnO:Al films for application in heterojunction solar cells.In this application, expensive indium-tin oxide (ITO) is usually used. Under the standardAM1.5G spectrum (100 mW/cm2, 25 °C), the best fabricated cell shows an open-circuitvoltage of 411 mV, a short-circuit current density of 30.0 mA/cm2, a fill factor of 66.7 %,and a conversion efficiency of 8.2 %. This is believed to be the highest stable efficiencyever reported for this type of cell. By means of dark forward currentdensity-voltage-temperature (J-V-T) measurements, it is shown that the dominant currenttransport mechanism in the ZnO:Al/c-Si solar cells, in the intermediate forward biasvoltage region, is trap-assisted multistep tunneling.EVA poly-Si thin-films are prepared on four types of glass substrates (planar and texturedglass, both either bare or SiN-coated) based on evaporated Si, which is a cheaper Sideposition method than the existing technologies. The textured glass is realized by theUNSW-developed AIT process (AIT = aluminium-induced texture). The investigation isconcentrated on finding optimized process…
Subjects/Keywords: Zinc oxide; polycrystalline semiconductors; silicon; thin films
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Song, D. (2005). Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/29371 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1401/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Song, Dengyuan. “Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications.” 2005. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/29371 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1401/SOURCE01?view=true.
MLA Handbook (7th Edition):
Song, Dengyuan. “Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications.” 2005. Web. 15 Dec 2019.
Vancouver:
Song D. Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications. [Internet] [Doctoral dissertation]. University of New South Wales; 2005. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/29371 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1401/SOURCE01?view=true.
Council of Science Editors:
Song D. Zinc oxide TCOs (Transparent Conductive Oxides) and polycrystalline silicon thin-films for photovoltaic applications. [Doctoral Dissertation]. University of New South Wales; 2005. Available from: http://handle.unsw.edu.au/1959.4/29371 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:1401/SOURCE01?view=true

University of Newcastle
20.
Li, Jerry Pui Ho.
Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals.
Degree: PhD, 2014, University of Newcastle
URL: http://hdl.handle.net/1959.13/1049156
► Research Doctorate - Doctor of Philosophy (PhD)
The catalytic treatment of volatile organic compounds in the form of aliphatic and aromatic hydrocarbons was investigated on…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
The catalytic treatment of volatile organic compounds in the form of aliphatic and aromatic hydrocarbons was investigated on different heterogeneous catalysts. With the aliphatic hydrocarbons, a transesterification reaction between methanol and ethyl acetate was conducted using an MgO-BaO composite catalyst. The catalyst was catalysing the reaction but the work highlighted a knowledge gap regarding the mechanistic pathway. The study was extended to the catalytic treatment of an aromatic hydrocarbon, benzaldehyde, applying the Knoevenagel condensation reaction. SiO₂, γ-Al₂O₃, ZnO, Fe₂O₃ supports impregnated with Mg and Ba were used as catalysts Based on the TOF of the reaction, catalysts with the high TOF values had fewer base sites, showing high catalytic activity per site, but also high rate of deactivation. Most interestingly, over ZnO modest TOF values were obtained but the highest concentration of base sites per area was found. ZnO as a catalyst was further investigated, using in situ FTIR and TPD-MS to observe benzaldehyde and ethyl cyanoacetate adsorption and desorption on the surface. Most interestingly, benzaldehyde and ethyl cyanoacetate form intermediate species that are stabilised on the surface, which play an important role in the reaction mechanism. TPD-MS showed the intermediates are thermally stable on the catalyst surface. Finally the catalytic treatment of phenol through a hydroxylation reaction with H2O2 as oxidant over-MFI, Fe-MFI, H-BEA, Fe-BEA and TS-1 zeolite catalysts was investigated. Over H-BEA, biphenyl product was observed. It is suggested, that the larger pore size of H-BEA facilitates coupling of two phenol molecules. Two distinct mechanistic pathways are proposed for acid and redox catalysts.
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering.
Subjects/Keywords: heterogeneous catalysis; characterisation; alkaline earth metal oxides; zinc oxide; Knoevenagel condensation; transesterification; hydroxylation; acidity; basicity; in situ FTIR; TPD; zeolites
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, J. P. H. (2014). Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1049156
Chicago Manual of Style (16th Edition):
Li, Jerry Pui Ho. “Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals.” 2014. Doctoral Dissertation, University of Newcastle. Accessed December 15, 2019.
http://hdl.handle.net/1959.13/1049156.
MLA Handbook (7th Edition):
Li, Jerry Pui Ho. “Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals.” 2014. Web. 15 Dec 2019.
Vancouver:
Li JPH. Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals. [Internet] [Doctoral dissertation]. University of Newcastle; 2014. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/1959.13/1049156.
Council of Science Editors:
Li JPH. Characterisation of heterogeneous acid/base catalysts and their application in the synthesis of fine and intermediate chemicals. [Doctoral Dissertation]. University of Newcastle; 2014. Available from: http://hdl.handle.net/1959.13/1049156

University of New South Wales
21.
Mar, Gock Leong.
Single source chemical vapour deposition of zinc oxide films.
Degree: Chemistry, 1997, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/58360
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45846/SOURCE02?view=true
Subjects/Keywords: Thin films; Zinc oxide; Chemical vapor deposition; Thesis Digitisation Program
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mar, G. L. (1997). Single source chemical vapour deposition of zinc oxide films. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/58360 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45846/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Mar, Gock Leong. “Single source chemical vapour deposition of zinc oxide films.” 1997. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/58360 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45846/SOURCE02?view=true.
MLA Handbook (7th Edition):
Mar, Gock Leong. “Single source chemical vapour deposition of zinc oxide films.” 1997. Web. 15 Dec 2019.
Vancouver:
Mar GL. Single source chemical vapour deposition of zinc oxide films. [Internet] [Doctoral dissertation]. University of New South Wales; 1997. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/58360 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45846/SOURCE02?view=true.
Council of Science Editors:
Mar GL. Single source chemical vapour deposition of zinc oxide films. [Doctoral Dissertation]. University of New South Wales; 1997. Available from: http://handle.unsw.edu.au/1959.4/58360 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:45846/SOURCE02?view=true

University of Technology, Sydney
22.
Choi, Sumin.
Zinc oxide nanophotonics : toward quantum photonic technologies.
Degree: 2016, University of Technology, Sydney
URL: http://hdl.handle.net/10453/62382
► Zinc oxide (ZnO) is a large bandgap (3.37 eV at room temperature) semiconductor and is a good candidate for short wavelength photonic devices such as…
(more)
▼ Zinc oxide (ZnO) is a large bandgap (3.37 eV at room temperature) semiconductor and is a good candidate for short wavelength photonic devices such as laser diodes. A large exciton binding energy (60 meV) at room temperature in addition to the advantages of being able to grow various nanostructure forms have made ZnO suitable for a wide range of applications in optoelectronic devices.
Driven by the rapid advance of nanophotonics, it is necessary to develop single photon sources (SPSs) and optical resonators in new class of materials. In particular, SPSs are required for a wide range of applications in quantum information science, quantum cryptography, and quantum communications. ZnO has been investigated for classical light emitting applications such as energy efficient light emitting diodes (LEDs) and ultraviolet (UV) lasers. Significantly ZnO has recently been identified as a promising candidate for quantum photonic technologies. Thus in this thesis the optical properties of ZnO micro- and nano-structures were investigated for ZnO nanophotonic technologies, specifically their applications in single photon emission and optical resonators.
Firstly, the formation of radiative point defects in ZnO nanoparticles and their photophysical properties were investigated. In particular, using correlative photoluminescence (PL), cathodoluminescence (CL), electron paramagnetic resonance (EPR), and x-ray absorption near edge spectroscopy (XANES) it is shown that green luminescence (GL) at 2.48 eV and an EPR line at g = 2.00 belong to a surface oxygen vacancy (V⁺o,s) center, while a second green emission at 2.28 eV is associated with zinc vacancy (VZn) centers. It is established that these point defects exhibit nanosecond lifetimes when excited by above bandgap or sub-bandgap (405 nm and 532 nm excitation wavelength) excitation. These results demonstrate that point defects in ZnO nanostructures can be engineered for nanophotonic technologies.
ZnO nanoparticles were consequently studied for the investigation of room temperature single photon emission from defect centers in ZnO nanoparticles. Under the optical excitation with 532 nm green laser, the emitters exhibit bright broadband fluorescence in the red spectral range centered at 640 nm. The red fluorescence from SPSs in ZnO defect center is almost fully linearly polarized with high signal-to-noise ratio. The studied emitters showed continuous blinking; however, it was confirmed that bleaching can be suppressed using a polymethyl methacrylate (PMMA) coating. Furthermore, passivation by hydrogen treatment increase the density of single photon emitters by a factor of three.
ZnO/Si heterojunctions were fabricated and used to investigate electrically driven light emission from localized defects in ZnO nanostructures at room temperature. It is shown that excellent rectifying behaviors were observed with the threshold voltages at ~ 18 V and ~ 7 V for ZnO nanoparticles and thin film-based devices, respectively. Both devices exhibit electroluminescence (EL) in the red spectral region…
Subjects/Keywords: Zinc oxide nanophotonics.; Single photon sources (SPSs).; Light emitting diodes (LEDs).; Ultraviolet (UV) lasers.; Quantum photonic technologies.; Whispering gallery modes (WGMs) emission.
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APA ·
Chicago ·
MLA ·
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to Zotero / EndNote / Reference
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APA (6th Edition):
Choi, S. (2016). Zinc oxide nanophotonics : toward quantum photonic technologies. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/62382
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):
Choi, Sumin. “Zinc oxide nanophotonics : toward quantum photonic technologies.” 2016. Thesis, University of Technology, Sydney. Accessed December 15, 2019.
http://hdl.handle.net/10453/62382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Choi, Sumin. “Zinc oxide nanophotonics : toward quantum photonic technologies.” 2016. Web. 15 Dec 2019.
Vancouver:
Choi S. Zinc oxide nanophotonics : toward quantum photonic technologies. [Internet] [Thesis]. University of Technology, Sydney; 2016. [cited 2019 Dec 15].
Available from: http://hdl.handle.net/10453/62382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Choi S. Zinc oxide nanophotonics : toward quantum photonic technologies. [Thesis]. University of Technology, Sydney; 2016. Available from: http://hdl.handle.net/10453/62382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales
23.
Puchert, Martin.
Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films.
Degree: Science. Chemistry, 1996, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/62256
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58542/SOURCE01?view=true
Subjects/Keywords: Sputtering Physics; Magnetrons; Zinc oxide; Crystal growth; Thin films; Thin films; Thesis Digitisation Program
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APA ·
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MLA ·
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APA (6th Edition):
Puchert, M. (1996). Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/62256 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58542/SOURCE01?view=true
Chicago Manual of Style (16th Edition):
Puchert, Martin. “Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films.” 1996. Doctoral Dissertation, University of New South Wales. Accessed December 15, 2019.
http://handle.unsw.edu.au/1959.4/62256 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58542/SOURCE01?view=true.
MLA Handbook (7th Edition):
Puchert, Martin. “Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films.” 1996. Web. 15 Dec 2019.
Vancouver:
Puchert M. Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films. [Internet] [Doctoral dissertation]. University of New South Wales; 1996. [cited 2019 Dec 15].
Available from: http://handle.unsw.edu.au/1959.4/62256 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58542/SOURCE01?view=true.
Council of Science Editors:
Puchert M. Growth of polycrystalline zinc oxide films by magnetron sputtering studies of the structural, optical, and electrical properties of sputtered zinc oxide films, and thickness-dependent stresses in amorphous carbon films and polycrystalline zinc oxide films. [Doctoral Dissertation]. University of New South Wales; 1996. Available from: http://handle.unsw.edu.au/1959.4/62256 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:58542/SOURCE01?view=true

University of Queensland
24.
Osmond, Gillian.
Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings.
Degree: Australian Institute of Bioengineering and Nanotechnology, 2014, University of Queensland
URL: http://espace.library.uq.edu.au/view/UQ:347180
Subjects/Keywords: Zinc oxide; Zinc stearate; zinc carboxylate; Zinc soap; Metal soap; Aluminium stearate; Painting conservation; Fourier transform infrared (FTIR) spectroscopy; Nguyen Trọng Kiệm; E Phillips Fox; 030301 Chemical Characterisation of Materials; 030606 Structural Chemistry and Spectroscopy; 210203 Materials Conservation
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Osmond, G. (2014). Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:347180
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):
Osmond, Gillian. “Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings.” 2014. Thesis, University of Queensland. Accessed December 15, 2019.
http://espace.library.uq.edu.au/view/UQ:347180.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Osmond, Gillian. “Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings.” 2014. Web. 15 Dec 2019.
Vancouver:
Osmond G. Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings. [Internet] [Thesis]. University of Queensland; 2014. [cited 2019 Dec 15].
Available from: http://espace.library.uq.edu.au/view/UQ:347180.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Osmond G. Zinc oxide-centred deterioration of modern artists’ oil paint and implications for the conservation of twentieth century paintings. [Thesis]. University of Queensland; 2014. Available from: http://espace.library.uq.edu.au/view/UQ:347180
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Queensland
25.
Zhang, Luhong.
Photocatalysts with adsorption property for dye-contaminated water purification.
Degree: School of Chemical Engineering, 2017, University of Queensland
URL: http://espace.library.uq.edu.au/view/UQ:656461
Subjects/Keywords: Layered double hydroxide; Zinc oxide; Carbon nitride; Semiconductor; Adsorption; Photocatalyst; Photocatalytic degradation; 0904 Chemical Engineering; 091202 Composite and Hybrid Materials; 091205 Functional Materials; 100701 Environmental Nanotechnology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, L. (2017). Photocatalysts with adsorption property for dye-contaminated water purification. (Thesis). University of Queensland. Retrieved from http://espace.library.uq.edu.au/view/UQ:656461
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):
Zhang, Luhong. “Photocatalysts with adsorption property for dye-contaminated water purification.” 2017. Thesis, University of Queensland. Accessed December 15, 2019.
http://espace.library.uq.edu.au/view/UQ:656461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Luhong. “Photocatalysts with adsorption property for dye-contaminated water purification.” 2017. Web. 15 Dec 2019.
Vancouver:
Zhang L. Photocatalysts with adsorption property for dye-contaminated water purification. [Internet] [Thesis]. University of Queensland; 2017. [cited 2019 Dec 15].
Available from: http://espace.library.uq.edu.au/view/UQ:656461.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang L. Photocatalysts with adsorption property for dye-contaminated water purification. [Thesis]. University of Queensland; 2017. Available from: http://espace.library.uq.edu.au/view/UQ:656461
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queensland University of Technology
26.
Johansen, Jonathan Frederick.
Mathematical modelling of primary alkaline batteries.
Degree: 2007, Queensland University of Technology
URL: https://eprints.qut.edu.au/16412/
► Three mathematical models, two of primary alkaline battery cathode discharge, and one of primary alkaline battery discharge, are developed, presented, solved and investigated in this…
(more)
▼ Three mathematical models, two of primary alkaline battery cathode discharge, and one of primary alkaline battery discharge, are developed, presented, solved and investigated in this thesis. The primary aim of this work is to improve our understanding of the complex, interrelated and nonlinear processes that occur within primary alkaline batteries during discharge.
We use perturbation techniques and Laplace transforms to analyse and simplify an existing model of primary alkaline battery cathode under galvanostatic discharge. The process highlights key phenomena, and removes those phenomena that have very little effect on discharge from the model. We find that electrolyte variation within Electrolytic Manganese Dioxide (EMD) particles is negligible, but proton diffusion within EMD crystals is important. The simplification process results in a significant reduction in the number of model equations, and greatly decreases the computational overhead of the numerical simulation software. In addition, the model results based on this simplified framework compare well with available experimental data.
The second model of the primary alkaline battery cathode discharge simulates step potential electrochemical spectroscopy discharges, and is used to improve our understanding of the multi-reaction nature of the reduction of EMD. We find that a single-reaction framework is able to simulate multi-reaction behaviour through the use of a nonlinear ion-ion interaction term.
The third model simulates the full primary alkaline battery system, and accounts for the precipitation of zinc oxide within the separator (and other regions), and subsequent internal short circuit through this phase. It was found that an internal short circuit is created at the beginning of discharge, and this self-discharge may be exacerbated by discharging the cell intermittently. We find that using a thicker separator paper is a very effective way of minimising self-discharge behaviour.
The equations describing the three models are solved numerically in MATLABR, using three pieces of numerical simulation software. They provide a flexible and powerful set of primary alkaline battery discharge prediction tools, that leverage the simplified model framework, allowing them to be easily run on a desktop PC.
Subjects/Keywords: advection; anode; asymptotic analysis; BET surface area; binary electrolyte; boundary condition; Butler-Volmer equation; cathode; closed circuit voltage; concentration polarisation; control volume; current path; discretisation; diffusion; electrochemical reaction; electrode; electrolytic manganese dioxide; EMD crystals; EMD particles; exchange current density; geometric surface area; initial condition; linearisation; macrohomogeneous porous electrode theory; mathematical model; Nernst equation; ohmic losses; open circuit voltage; ordinary differential equation; overpotential; partial differential equation; perturbation techniques; potassium hydroxide; potassium zincate; precipitation reaction; primary battery; separator paper; simulation; step potential electrochemical spectroscopy; ternary electrolyte; theoretical capacity; utilisation; zinc; zinc oxide
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Johansen, J. F. (2007). Mathematical modelling of primary alkaline batteries. (Thesis). Queensland University of Technology. Retrieved from https://eprints.qut.edu.au/16412/
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):
Johansen, Jonathan Frederick. “Mathematical modelling of primary alkaline batteries.” 2007. Thesis, Queensland University of Technology. Accessed December 15, 2019.
https://eprints.qut.edu.au/16412/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Johansen, Jonathan Frederick. “Mathematical modelling of primary alkaline batteries.” 2007. Web. 15 Dec 2019.
Vancouver:
Johansen JF. Mathematical modelling of primary alkaline batteries. [Internet] [Thesis]. Queensland University of Technology; 2007. [cited 2019 Dec 15].
Available from: https://eprints.qut.edu.au/16412/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Johansen JF. Mathematical modelling of primary alkaline batteries. [Thesis]. Queensland University of Technology; 2007. Available from: https://eprints.qut.edu.au/16412/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
.