subject:(Carbon Nanotubes)

University of Hong Kong

1. Lo, Kin-cheung. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.

Degree: PhD, 2014, University of Hong Kong

URL: Lo, K. [盧建彰]. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5481867 ; http://dx.doi.org/10.5353/th_b5481867 ; http://hdl.handle.net/10722/225264

► Carbon nanotubes (CNTs) are one-dimensional nanomaterials with interesting electronic properties and have potential applications in miniaturization of optoelectronic devices. Although various dispersants have been designed… (more)

▼ Carbon nanotubes (CNTs) are one-dimensional nanomaterials with interesting electronic properties and have potential applications in miniaturization of optoelectronic devices. Although various dispersants have been designed to functionalize CNTs, the optoelectronic properties of individual functionalized CNTs are yet to be fully explored. In this work, electrostatic force microscopy (EFM) and photoconductive atomic force microscopy (PCAFM) were utilized to characterize individual functionalized CNTs and rigorous statistical methodology for data analysis was applied to draw tenable conclusions. A poly(alkylthiophene)-based conjugated polyelectrolyte was used as a photosensitizer and a dispersant of CNTs to form a composite. EFM was performed for individual pristine CNTs and individual functionalized CNTs for comparison. It was the first time that charges of a polyelectrolyte on individual CNTs were quantitatively detected by EFM. PCAFM has revealed that the dominant charge transport mechanism of individual functionalized CNTs is Simmons tunneling. The large statistical dispersion of the PCAFM data necessitated rigorous statistical analysis to distinguish real effects of illumination from artifacts. The nonparametric bias-corrected and accelerated bootstrap method quantified the photoresponses conveniently without any presumption of the data distributions. The equilibrium conductance of an individual functionalized CNT exhibited a one-fold increase upon white light illumination. A series of ruthenium-containing diblock copolymers were synthesized by reversible addition-fragmentation chain transfer polymerization. The pyrene-containing first block acted as an anchoring group to interact with CNTs and the ruthenium(II) complexes in the second block acted as photosensitizers. Moieties with different electronic properties were conjugated to pyrene to tune the energy levels. The photoresponses of composites formed by these polymers were compared by PCAFM. The multiway factorial analysis of variance was employed to analyze the PCAFM data to investigate the effects of the dispersants, illumination condition and applied bias on the charge transport of the composites. The difference in photoresponse among different composites was related to the conformations of the composites, which were elucidated by molecular dynamics simulations, and the electronic properties of polymers, which were deduced by cyclic voltammetry and density functional theory calculations. The analysis suggests that the photogenerated charges from the metal complexes in the second block pass through the first block before reaching the CNT. The photoresponses of the CNT composites have potential applications in optoelectronic devices. With EFM to identify charged coatings and PCAFM to probe the photoresponses, individual functionalized CNTs can be characterized in detail. The rigorous statistical methodology can unravel the charge transport mechanism, which may provide guidelines for designing molecular…

Subjects/Keywords: Carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lo, K. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Doctoral Dissertation). University of Hong Kong. Retrieved from Lo, K. [盧建彰]. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5481867 ; http://dx.doi.org/10.5353/th_b5481867 ; http://hdl.handle.net/10722/225264

Chicago Manual of Style (16^th Edition):

Lo, Kin-cheung. “Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.” 2014. Doctoral Dissertation, University of Hong Kong. Accessed February 18, 2020. Lo, K. [盧建彰]. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5481867 ; http://dx.doi.org/10.5353/th_b5481867 ; http://hdl.handle.net/10722/225264.

MLA Handbook (7^th Edition):

Lo, Kin-cheung. “Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.” 2014. Web. 18 Feb 2020.

Vancouver:

Lo K. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. [Internet] [Doctoral dissertation]. University of Hong Kong; 2014. [cited 2020 Feb 18]. Available from: Lo, K. [盧建彰]. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5481867 ; http://dx.doi.org/10.5353/th_b5481867 ; http://hdl.handle.net/10722/225264.

Council of Science Editors:

Lo K. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. [Doctoral Dissertation]. University of Hong Kong; 2014. Available from: Lo, K. [盧建彰]. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5481867 ; http://dx.doi.org/10.5353/th_b5481867 ; http://hdl.handle.net/10722/225264

Oregon State University

2. Aspitarte, Lee. Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices.

Degree: PhD, 2017, Oregon State University

URL: http://hdl.handle.net/1957/61687

► CNTs also offer new opportunities to study new science and develop new technology enabled by their strong electron-electron (e-e) interactions. The lack of dielectric screening… (more)

▼ CNTs also offer new opportunities to study new science and develop new technology enabled by their strong electron-electron (e-e) interactions. The lack of dielectric screening inherent in nanoscale structures like CNTs leads to strong e-e interactions, which produce unique physical phenomena. In this thesis, we study the effects of strong e-e interactions in CNTs through the experimental system of suspended CNT devices fabricated with two gate electrodes. The work presented here includes the development of a theoretical framework to understand of the behavior of these ‘split-gate’ devices. Using this framework, we are able observe signatures of the strong e-e interactions in CNTs. The purpose of using split-gates (two gate electrodes) is to electrostatically dope the CNT into a pn junction. These suspended CNT pn junctions have been used by several groups to investigate the optoelectronic properties of CNTs. However, the device transport models proposed by previous authors have been unable to explain the disparities in experimental observations. In particular, different authors have seen different responses of the source-drain current vs source-drain bias (Isd-Vsd characteristic) of similar devices. To explore the reason for this variability, we investigate the Isd-Vsd characteristic while varying the metal contact work function. The results allow us to develop a model that explains the variation in the literature in terms of variations in the metal work functions and/or CNT diameter. The device is modeled with a pn junction diode in the center of the CNT and Schottky diodes at the contacts. We are also able to use this model and temperature dependent measurements to extract the n-type and p-type Schottky barrier heights. Carbon nanotubes (CNTs) are a promising material for high-performance electronics beyond silicon. Unlike silicon, the nature of the transport band gap in CNTs is not fully understood. The transport gap in CNTs is predicted to be strongly driven by e-e interactions and correlations, even at room temperature. The effects a dielectric material, like a SiO2 substrate, on the transport gap is important for implementation of this technology. Here, we use dielectric liquids to screen e-e interactions in individual suspended ultra-clean CNTs. Using multiple techniques, the transport gap is measured as dielectric screening is increased. Changing the dielectric environment from air to isopropanol, we observe a 25% reduction in the transport gap of semiconducting CNTs, and a 32% reduction in the band gap of narrow-gap CNTs. Additional measurements are reported in dielectric oils. Our results elucidate the nature of the transport gap in CNTs, and show that dielectric environment offers a mechanism for significant control over the transport band gap. CNTs are candidates for next-generation photovoltaic technology, because they have the potential to break the Shockley-Queisser limit. Because of the strong e-e interactions, photogenerated carriers in CNTs can undergo carrier multiplication, where more than… Advisors/Committee Members: Minot, Ethan (advisor), Tate, Janet (committee member).

Subjects/Keywords: Carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aspitarte, L. (2017). Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/61687

Chicago Manual of Style (16^th Edition):

Aspitarte, Lee. “Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices.” 2017. Doctoral Dissertation, Oregon State University. Accessed February 18, 2020. http://hdl.handle.net/1957/61687.

MLA Handbook (7^th Edition):

Aspitarte, Lee. “Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices.” 2017. Web. 18 Feb 2020.

Vancouver:

Aspitarte L. Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1957/61687.

Council of Science Editors:

Aspitarte L. Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices. [Doctoral Dissertation]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61687

Anna University

3. Chandra kishore S. Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;.

Degree: Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/43003

►

Carbon is a chemical element with the symbol C atomic number newline6 and electron configuration He 2s2 2p2 Carbon is set as the sixth element… (more)

Subjects/Keywords: Carbon nanotubes; Multi walled nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

S, C. k. (2015). Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/43003

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

S, Chandra kishore. “Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;.” 2015. Thesis, Anna University. Accessed February 18, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/43003.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

S, Chandra kishore. “Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;.” 2015. Web. 18 Feb 2020.

Vancouver:

S Ck. Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 18]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43003.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

S Ck. Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/43003

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

4. Nakagawa, Ayako. Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts.

Degree: MS, Chemical Engineering, 2008, Oregon State University

URL: http://hdl.handle.net/1957/9151

► Influences of operating conditions on the production of carbon nanotubes (CNTs) were studied using Fe and Fe-Ni bimetallic catalysts supported on silicon monoxide (SiO). The… (more)

▼ Influences of operating conditions on the production of carbon nanotubes (CNTs) were studied using Fe and Fe-Ni bimetallic catalysts supported on silicon monoxide (SiO). The catalysts were prepared in three steps: (1) impregnation of SiO powders with ferric nitride or combinations of ferric and nickel nitrides, (2) oxidation of nitrides in an air stream, and (3) grinding the powders obtained. CNTs were successfully synthesized by catalytic CVD using NH₃/CH₄ mixtures in a horizontal tubular flow reactor. The following process parameters were varied to investigate their effects on the growth rates of CNTs. The morphologies of catalysts and product CNTs were observed by scanning electron microscope (SEM). • The particle size of SiO, • metal composition, • metal loading, • temperature for catalyst oxidation, • extent of grinding of catalysts, • NH₃ pretreatment time, • reaction temperature for CNT growth, • reaction time, and • NH₃/CH₄ feed ratio. Two different average sizes of SiO particles, 8 μm and 44 μm, were compared based on the growth of CNTs in 5 min. Catalysts supported on 44 μm average sized SiO particles demonstrated higher yields when they were not pretreated in an NH₃ stream. When 1 wt% Fe was loaded, aligned CNTs were formed, and a highest growth rate per unit mass of catalyst was observed. The range of oxidation temperature to achieve highest catalyst activities depended on metals and metal contents: 600 - 750°C for 1 wt% Fe, 450 - 600°C for 3 wt% Fe, and 750 - 900°C for Fe-Ni. Grinding catalysts for at least 3 minutes increased the growth rate of CNTs by approximately 40 percent. The growth of CNTs was enhanced when no NH₃ pretreatment of catalysts was carried out, regardless of metals and metal contents. However, CNTs did not grow appreciably from methane without ammonia. An NH₃/CH₄ feed ratio of 0.15 - 0.25 was observed to yield highest growth rates. The reaction temperature to achieve highest CNT growth rates was found to be in the range between 990 and 1000 °C. The growth of CNTs was not linear but decreased with reaction time. Advisors/Committee Members: Kimura, Shoichi (advisor), Palmer, Todd S. (committee member).

Subjects/Keywords: carbon nanotubes; Nanotubes – Synthesis

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nakagawa, A. (2008). Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/9151

Chicago Manual of Style (16^th Edition):

Nakagawa, Ayako. “Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts.” 2008. Masters Thesis, Oregon State University. Accessed February 18, 2020. http://hdl.handle.net/1957/9151.

MLA Handbook (7^th Edition):

Nakagawa, Ayako. “Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts.” 2008. Web. 18 Feb 2020.

Vancouver:

Nakagawa A. Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts. [Internet] [Masters thesis]. Oregon State University; 2008. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1957/9151.

Council of Science Editors:

Nakagawa A. Catalytic chemical vapor deposition synthesis of carbon nanotubes from methane on SiO supported Fe and Fe−Ni catalysts. [Masters Thesis]. Oregon State University; 2008. Available from: http://hdl.handle.net/1957/9151

Penn State University

5. Marteeny, Donald Edwin. An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes.

Degree: MS, Mechanical Engineering, 2008, Penn State University

URL: https://etda.libraries.psu.edu/catalog/8279

► Nanotubular structures have recently attracted a great deal of interest because of their high strength, high thermal conductivity, chemical stability, and unique electrical behavior. These… (more)

Subjects/Keywords: Carbon Nanotubes; Nanotubes; Carbon; Silicon; Flame Synthesis

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Marteeny, D. E. (2008). An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes. (Masters Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/8279

Chicago Manual of Style (16^th Edition):

Marteeny, Donald Edwin. “An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes.” 2008. Masters Thesis, Penn State University. Accessed February 18, 2020. https://etda.libraries.psu.edu/catalog/8279.

MLA Handbook (7^th Edition):

Marteeny, Donald Edwin. “An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes.” 2008. Web. 18 Feb 2020.

Vancouver:

Marteeny DE. An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes. [Internet] [Masters thesis]. Penn State University; 2008. [cited 2020 Feb 18]. Available from: https://etda.libraries.psu.edu/catalog/8279.

Council of Science Editors:

Marteeny DE. An Exploration of the Flame Synthesis of Silicon Doped Carbon Nanotubes. [Masters Thesis]. Penn State University; 2008. Available from: https://etda.libraries.psu.edu/catalog/8279

University of Hong Kong

6. Li, Sheung-yin. Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes.

Degree: M. Phil., 2014, University of Hong Kong

URL: Li, S. [李尚然]. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5194737 ; http://dx.doi.org/10.5353/th_b5194737 ; http://hdl.handle.net/10722/197547

►

Two polyelectrolytes were synthesized with reversible addition-fragmentation chain transfer (RAFT) polymerization and Grignard metathesis (GRIM) polymerization for the functionalization of carbon nanotubes. The responses of… (more)

▼

Two polyelectrolytes were synthesized with reversible addition-fragmentation chain transfer (RAFT) polymerization and Grignard metathesis (GRIM) polymerization for the functionalization of carbon nanotubes. The responses of functionalized carbon nanotubes towards different substrates were well studied. A diblock polyelectrolyte with methacrylic acid containing block and pyrene pendant block was synthesized by RAFT polymerization. The pyrene pendant block anchored on the surface of carbon nanotubes while the methacrylic acid containing block dissolved in methanol to disperse individual carbon nanotubes. The dispersed carbon nanotubes have shown morphological responsive towards substrates with pyridine groups and amino groups on surface. The thickness of functionalized carbon nanotubes on these substrates increased from tens of nanometers to hundreds of nanometers due to the swelling of the methacrylic acid containing block. The methacrylic acid units were deprotonated by pyridine groups and amino groups on the surface so the polymer chains in the methacrylic acid containing block stretched into rigid rod structure leading to the swelling effect. A polythiophene-based conjugated polyelectrolyte with positive quaternary ammonium species on its side chains was synthesized by GRIM polymerization. The self-assembly behaviors of this conjugated polyelectrolyte in solvents with different polarities led to solvatochromism and different efficiencies for dispersion of carbon nanotubes. The efficiency of this conjugated polyelectrolyte for the dispersion of carbon nanotubes was highest when no aggregation was formed. The functionalized carbon nanotubes could be deposited on conductive substrates applied with negative potential due to the positive quaternary ammonium species. The density of carbon nanotubes deposited on the substrate increased with the potential applied. The electro-deposition of this functionalized carbon nanotubes could be applied for large scale fabrication of carbon nanotubes thin film.

published_or_final_version

Chemistry

Master

Master of Philosophy

Subjects/Keywords: Carbon nanotubes; Polyelectrolytes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, S. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Masters Thesis). University of Hong Kong. Retrieved from Li, S. [李尚然]. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5194737 ; http://dx.doi.org/10.5353/th_b5194737 ; http://hdl.handle.net/10722/197547

Chicago Manual of Style (16^th Edition):

Li, Sheung-yin. “Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes.” 2014. Masters Thesis, University of Hong Kong. Accessed February 18, 2020. Li, S. [李尚然]. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5194737 ; http://dx.doi.org/10.5353/th_b5194737 ; http://hdl.handle.net/10722/197547.

MLA Handbook (7^th Edition):

Li, Sheung-yin. “Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes.” 2014. Web. 18 Feb 2020.

Vancouver:

Li S. Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. [Internet] [Masters thesis]. University of Hong Kong; 2014. [cited 2020 Feb 18]. Available from: Li, S. [李尚然]. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5194737 ; http://dx.doi.org/10.5353/th_b5194737 ; http://hdl.handle.net/10722/197547.

Council of Science Editors:

Li S. Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. [Masters Thesis]. University of Hong Kong; 2014. Available from: Li, S. [李尚然]. (2014). Sythesis and characterization of polyelectrolytes for functionalization of carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5194737 ; http://dx.doi.org/10.5353/th_b5194737 ; http://hdl.handle.net/10722/197547

University of Louisville

7. Abeyweera, Buddika KA., 1980-. Electrochemically mediated charge transfer effects on single-walled carbon nanotubes.

Degree: MS, 2009, University of Louisville

URL: 10.18297/etd/8 ; https://ir.library.louisville.edu/etd/8

► This thesis is based on experimental work on electrochemically mediated charge transfer effects on Single-walled carbon nanotube bundles. The study of these effects are very… (more)

▼ This thesis is based on experimental work on electrochemically mediated charge transfer effects on Single-walled carbon nanotube bundles. The study of these effects are very important towards understanding the sensitivity of gases on nanostructures like single-walled carbon nanotubes. Chapter one covers the introduction and overview of carbon nanostructures including single-walled carbon nanotubes. Chapter two covers the experimental techniques involving sample preparation, experimental setup and data acquisition. Chapter three consists of Results and the Discussions explaining the mechanisms based on charge transfer mechanism. In the final chapter, implications and the importance of the study are explained. Single-walled carbon nanotubes are used as chemical gas sensors due to its high sensitivity and rapid response to various gases. Studying the electrical properties of single-walled carbon nanotubes increased the interest for further study related to sensor properties. Intrinsic properties of SWNT thin films have been studied extensively by measuring in situ thermoelectric power and 4 probe resistances. Recently, it has been shown that the conductivity and the type of SWNT material change dramatically due to exposure of SWNT sample to various gases. Even though several mechanisms have been proposed to explain this phenomenon, it has been a controversial since the presence of water vapor barrier is not taken into consideration for explaining the mechanism. Electrochemically mediated charge transfer has been studied by its effects on the surface conductivity of diamond. And It has been shown that a pronounced conductivity been observed in Hydrogen terminated diamond even though it shows an insulating properties. We proposed a mechanism for the change of intrinsic properties of semiconducting SWNTs by systematically shifting the Fermi energy level by the exposure of different pH saturated water vapors. Due to the change in chemical potential of the redox couple of various gas saturated water vapor and Fermi energy of SWNT will result in charge transfer from water layer to SWNT or vice versa. The changes in thermoelectric power and Resistance data correlate with relative position of the Fermi level with respect to the chemical potential of the aqueous layer. SWNT samples were prepared by Pulse Laser Vaporization technique and purified by standard chemical methods. Experiments were performed using ambient oxygen and ammonia which have been bubbled through acid and basic solutions of different pH values at atmospheric pressure and room temperature. Advisors/Committee Members: Sumanasekera, Gamini U., Wu, Shi Yu, Harnett, Cindy.

Subjects/Keywords: Carbon nanotubes; Physics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Abeyweera, Buddika KA., 1. (2009). Electrochemically mediated charge transfer effects on single-walled carbon nanotubes. (Masters Thesis). University of Louisville. Retrieved from 10.18297/etd/8 ; https://ir.library.louisville.edu/etd/8

Chicago Manual of Style (16^th Edition):

Abeyweera, Buddika KA., 1980-. “Electrochemically mediated charge transfer effects on single-walled carbon nanotubes.” 2009. Masters Thesis, University of Louisville. Accessed February 18, 2020. 10.18297/etd/8 ; https://ir.library.louisville.edu/etd/8.

MLA Handbook (7^th Edition):

Abeyweera, Buddika KA., 1980-. “Electrochemically mediated charge transfer effects on single-walled carbon nanotubes.” 2009. Web. 18 Feb 2020.

Vancouver:

Abeyweera, Buddika KA. 1. Electrochemically mediated charge transfer effects on single-walled carbon nanotubes. [Internet] [Masters thesis]. University of Louisville; 2009. [cited 2020 Feb 18]. Available from: 10.18297/etd/8 ; https://ir.library.louisville.edu/etd/8.

Council of Science Editors:

Abeyweera, Buddika KA. 1. Electrochemically mediated charge transfer effects on single-walled carbon nanotubes. [Masters Thesis]. University of Louisville; 2009. Available from: 10.18297/etd/8 ; https://ir.library.louisville.edu/etd/8

Boston College

8. Greene, Allison Kristen. The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes.

Degree: PhD, Chemistry, 2012, Boston College

URL: http://dlib.bc.edu/islandora/object/bc-ir:101948

► The distinctive molecular structure of carbon nanotubes makes them desirable for electronic and chemical materials; however, current production methods are limited with respect to purity… (more)

▼ The distinctive molecular structure of carbon nanotubes makes them desirable for electronic and chemical materials; however, current production methods are limited with respect to purity and chirality. Geodesic polyarenes serve as superb templates for the bottom up synthesis of carbon nanotube end-caps, setting the chirality and dimensions of the carbon nanotubes. The work herein describes the synthetic efforts towards the rational synthesis of a [6,6] carbon nanotube end-cap. Chapter 1 describes the efforts towards the synthesis of a C60H12 end-cap, in which the synthesis of an advanced intermediate, peri-bis(dibenzo[a,g]corannulene) is complete; however, the insolubility of this material proved to be problematic in a subsequent cycloaddition reaction. This reaction is examined computationally in order to understand the failure of the addition of dienophile, maleic anhydride, to peri-bis(dibenzo[a,g]corannulene). In Chapters 2 and 3, the development of solubility-enhancing methods is described. The development of a solubility-enhancing dienophile is successfully employed to induce the solubility of a formerly insoluble diene, peri-bis(dibenzo[a,g]corannulene), through Diels-Alder addition. Another method, employs the incorporation of tert-butyl groups onto peri-bis(dibenzo[a,g]corannulene) to successfully induce solubility. The enhanced-solubility enables the successful Diels-Alder addition of simple maleimide dienophiles, installing all necessary carbon atoms for the desired end-cap. Pyrolysis of the bis-anhydride derived from the aromatized bis-maleimide adduct afforded the C60H12 end-cap, which is the second carbon nanotube end-cap ever synthesized and the first of these dimensions. Chapter 3 also explores a palladium catalyzed intramolecular arylation reaction to form a pivotal intermediate in the synthesis of the end-cap, dibenzo[a,g]corannulene. The mechanism for the formation of a problematic byproduct resulting from reductive dehalogenation is discussed. Utilizing a deuterium labeled solvent, it is found that deuterium is incorporated onto the hydrocarbon, indicating that the solvent (N,N-dimethylformamide-d7) is the source of hydrogen for the reductive dehalogenation. These conditions are further exploited in Chapter 4 for the convenient perdeuteration of a variety of polycyclic aromatic hydrocarbons. Chapter 5 describes the first synthesis of a nitrogen containing geodesic polyarene, dibenzo[g,m]azacorannulene. This synthesis is completed in seven steps from a commercially available source in a 28% overall yield. Advisors/Committee Members: Lawrence T. Scott (Thesis advisor).

Subjects/Keywords: Carbon nanotubes; Fullerenes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Greene, A. K. (2012). The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes. (Doctoral Dissertation). Boston College. Retrieved from http://dlib.bc.edu/islandora/object/bc-ir:101948

Chicago Manual of Style (16^th Edition):

Greene, Allison Kristen. “The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes.” 2012. Doctoral Dissertation, Boston College. Accessed February 18, 2020. http://dlib.bc.edu/islandora/object/bc-ir:101948.

MLA Handbook (7^th Edition):

Greene, Allison Kristen. “The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes.” 2012. Web. 18 Feb 2020.

Vancouver:

Greene AK. The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes. [Internet] [Doctoral dissertation]. Boston College; 2012. [cited 2020 Feb 18]. Available from: http://dlib.bc.edu/islandora/object/bc-ir:101948.

Council of Science Editors:

Greene AK. The Rational Chemical Synthesis of a C60H12 Carbon Nanotube End-cap and Novel Geodisc Polyarenes. [Doctoral Dissertation]. Boston College; 2012. Available from: http://dlib.bc.edu/islandora/object/bc-ir:101948

University of Cambridge

9. White, Ashley Ann. Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites.

Degree: PhD, 2010, University of Cambridge

URL: http://www.dspace.cam.ac.uk/handle/1810/224760https://www.repository.cam.ac.uk/bitstream/1810/224760/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/5/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/3/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/6/Thesis%20for%20Printing%20Double%20Sided.pdf.jpg

► Hydroxyapatite (HA) is a biologically active ceramic that is used in surgery to replace bone. While HA promotes bone growth along its surface, its mechanical… (more)

▼ Hydroxyapatite (HA) is a biologically active ceramic that is used in surgery to replace bone. While HA promotes bone growth along its surface, its mechanical properties are not sufficient for major load-bearing medical devices. Carbon nanotubes (CNTs), as one of the strongest and stiffest materials available, have the potential to strengthen and toughen HA, thus expanding the range of clinical uses for the material. Furthermore, studies have suggested that the nanotubes themselves possess some bioactive properties. This work sought to develop and characterise HA-CNT composites in four main areas: 1) production and characterisation of green materials, 2) investigation of appropriate sintering atmospheres, 3) evaluation of mechanical properties, and 4) assessment of biological response to in vitro cell culture. HA was synthesised by a precipitation reaction between Ca(OH)2 and H3PO4, and multi-walled CNTs were produced by chemical vapour deposition. Composites were produced by adding the CNTs to the Ca(OH)2 solution as the HA was precipitating. Both as-made (nfCNTs) and acid-treated CNTs (fCNTs) were used to make composites with loadings of 0.5 – 5 wt.% CNTs. The resulting slurry was shear mixed and then processed to make a powder. The powder was then uniaxially pressed into tablets of ~45% theoretical density. Characterisation of the green material with XRD and FTIR found that the primary phase was HA which was well hydroxylated. The powder particles were found to have a bimodal size distribution, and all materials had similar surface areas, as determined by BET. Composites made with fCNTs were found to have a better dispersion of CNTs in the HA matrix and better interaction between the HA and CNTs compared with nfCNT composites. CNTs oxidise at the high temperatures needed to sinter HA, yet water is necessary to prevent dehydroxylation and decomposition of the HA. Using 5 wt.% fCNT composite, fourteen sintering atmospheres were investigated to determine their effect on phase purity, hydroxylation, sintered density, and remaining CNT content after sintering. An atmosphere of CO + H2 bubbled through ice water resulted in optimal properties. Additionally, it was found that increasing the gas flow rate and the number of samples sintered in one batch increased CNT retention. However, this came at the expense of the density of the sintered samples, as composites with a higher CNT content were more porous. To optimise the composite microstructure for mechanical studies, six different sintering time / temperature profiles were examined to determine their effect on density (balanced with CNT retention) and grain size. HA and both nfCNT and fCNT composites with CNT loadings of 0.5, 1, 2 and 5 wt.% were produced using the optimised atmosphere and profile, and then tested to determine tensile strength (using diametral compression) and hardness, and to look for evidence of toughening. It was found that CNTs had little reinforcing effect; instead, mechanical behaviour results were mainly attributed to…

Subjects/Keywords: hydroxyapatite; carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

White, A. A. (2010). Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites. (Doctoral Dissertation). University of Cambridge. Retrieved from http://www.dspace.cam.ac.uk/handle/1810/224760https://www.repository.cam.ac.uk/bitstream/1810/224760/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/5/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/3/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/6/Thesis%20for%20Printing%20Double%20Sided.pdf.jpg

Chicago Manual of Style (16^th Edition):

White, Ashley Ann. “Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites.” 2010. Doctoral Dissertation, University of Cambridge. Accessed February 18, 2020. http://www.dspace.cam.ac.uk/handle/1810/224760https://www.repository.cam.ac.uk/bitstream/1810/224760/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/5/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/3/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/6/Thesis%20for%20Printing%20Double%20Sided.pdf.jpg.

MLA Handbook (7^th Edition):

White, Ashley Ann. “Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites.” 2010. Web. 18 Feb 2020.

Vancouver:

White AA. Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites. [Internet] [Doctoral dissertation]. University of Cambridge; 2010. [cited 2020 Feb 18]. Available from: http://www.dspace.cam.ac.uk/handle/1810/224760https://www.repository.cam.ac.uk/bitstream/1810/224760/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/5/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/3/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/6/Thesis%20for%20Printing%20Double%20Sided.pdf.jpg.

Council of Science Editors:

White AA. Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites. [Doctoral Dissertation]. University of Cambridge; 2010. Available from: http://www.dspace.cam.ac.uk/handle/1810/224760https://www.repository.cam.ac.uk/bitstream/1810/224760/2/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/5/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/3/Thesis%20for%20Printing%20Double%20Sided.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/224760/6/Thesis%20for%20Printing%20Double%20Sided.pdf.jpg

University of Oklahoma

10. Irurzun, Veronica Magali. CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS.

Degree: PhD, 2011, University of Oklahoma

URL: http://hdl.handle.net/11244/318877

► As mentioned before, it is important to produce Carbon Nanotubes not only at a high rate but also with high selectivity. In order to quantify… (more)

Subjects/Keywords: Nanotubes; Carbon; Catalysts

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Irurzun, V. M. (2011). CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/318877

Chicago Manual of Style (16^th Edition):

Irurzun, Veronica Magali. “CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS.” 2011. Doctoral Dissertation, University of Oklahoma. Accessed February 18, 2020. http://hdl.handle.net/11244/318877.

MLA Handbook (7^th Edition):

Irurzun, Veronica Magali. “CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS.” 2011. Web. 18 Feb 2020.

Vancouver:

Irurzun VM. CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS. [Internet] [Doctoral dissertation]. University of Oklahoma; 2011. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/11244/318877.

Council of Science Editors:

Irurzun VM. CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS. [Doctoral Dissertation]. University of Oklahoma; 2011. Available from: http://hdl.handle.net/11244/318877

University of Oklahoma

11. ADEOYE, SAMUEL GBADEYAN. CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER.

Degree: PhD, 2012, University of Oklahoma

URL: http://hdl.handle.net/11244/319208

► Sizing is believed to be chemo-mechanical bonded to fiber surface and thus alleviates the adverse effects of its surface flaws. Consequently, the sizing on the… (more)

Subjects/Keywords: Carbon fibers; Nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

ADEOYE, S. G. (2012). CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319208

Chicago Manual of Style (16^th Edition):

ADEOYE, SAMUEL GBADEYAN. “CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER.” 2012. Doctoral Dissertation, University of Oklahoma. Accessed February 18, 2020. http://hdl.handle.net/11244/319208.

MLA Handbook (7^th Edition):

ADEOYE, SAMUEL GBADEYAN. “CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER.” 2012. Web. 18 Feb 2020.

Vancouver:

ADEOYE SG. CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER. [Internet] [Doctoral dissertation]. University of Oklahoma; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/11244/319208.

Council of Science Editors:

ADEOYE SG. CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF MICROSCALE CARBON FIBER AND CARBON-NANOTUBES GRAFTED FIBER WITH THE AID OF DYNAMIC MECHANICAL ANALYZER. [Doctoral Dissertation]. University of Oklahoma; 2012. Available from: http://hdl.handle.net/11244/319208

Deakin University

12. Li, Quanxiang. Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes.

Degree: 2015, Deakin University

URL: http://hdl.handle.net/10536/DRO/DU:30085484

► This research developed a novel method for coating carbon nanotubes onto carbon fibre surfaces. It provided valuable guidance for producing various CNT morphologies on fibre… (more)

Subjects/Keywords: carbon fibres; carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, Q. (2015). Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes. (Thesis). Deakin University. Retrieved from http://hdl.handle.net/10536/DRO/DU:30085484

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Li, Quanxiang. “Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes.” 2015. Thesis, Deakin University. Accessed February 18, 2020. http://hdl.handle.net/10536/DRO/DU:30085484.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Li, Quanxiang. “Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes.” 2015. Web. 18 Feb 2020.

Vancouver:

Li Q. Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes. [Internet] [Thesis]. Deakin University; 2015. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10536/DRO/DU:30085484.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Li Q. Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes. [Thesis]. Deakin University; 2015. Available from: http://hdl.handle.net/10536/DRO/DU:30085484

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech

13. Newcomb, Bradley Allen. Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber.

Degree: PhD, Materials Science and Engineering, 2015, Georgia Tech

URL: http://hdl.handle.net/1853/54881

► This study focuses on the processing, structure, and properties of gel spun polyacrylonitrile (PAN) and polyacrylonitrile/carbon nanotube (PAN/CNT) carbon fibers. Gel spun PAN based carbon… (more)

▼ This study focuses on the processing, structure, and properties of gel spun polyacrylonitrile (PAN) and polyacrylonitrile/carbon nanotube (PAN/CNT) carbon fibers. Gel spun PAN based carbon fibers are manufactured beginning with a study of PAN dissolution in an organic solvent (dimethylformamide, DMF). Homogeneity of the PAN/DMF solution is determined through dynamic shear rheology, and the slope of the Han Plot (log G’ vs log G’’). Solutions were then extruded into gel spun fibers using a 100 filament fiber spinning apparatus in a class 1000 cleanroom. Fibers were then subjected to fiber drawing, stabilization, and carbonization, to convert the PAN precursor fiber into carbon fiber. Carbon fiber tensile strength was shown to scale with the homogeneity of the PAN/DMF solution, as determined by the slope of the log G’ vs log G’’ plot. After the development of the understanding between the homogeneity of the PAN/DMF solutions on the gel spun PAN based carbon fiber tensile properties, the effect of altering the fiber spinning processing conditions on the gel spun PAN based carbon fiber structure and properties is pursued. Cross-sectional shape of the gel spun PAN precursor fiber, characterized with a stereomicroscope, was found to become more circular in cross-section as the gelation bath temperature was increased, the amount of solvent in the gelation bath was increased, and when the solvent was switched from DMF to dimethylacetamide (DMAc). Gel spun fibers were then subjected to fiber drawing, stabilization, and carbonization to manufacture the carbon fiber. Carbon fibers were characterized to determine single filament tensile properties and fiber structure using wide-angle x-ray diffraction (WAXD) and high resolution transmission electron microscopy (HRTEM). It was found that the carbon fiber tensile properties decreased as the carbon fiber circularity increased, as a result of the differences in microstructure of the carbon fiber that result from differences in fiber spinning conditions. In the second half of this study, the addition of CNT into the PAN precursor and carbon fiber is investigated. CNT addition occurs during the solution processing phase, prior to gel spinning. As a first study, Raman spectroscopy is employed to investigate the bundling behavior of the CNT after gel spinning and drawing of the PAN/CNT fibers. By monitoring the peak intensity of the (12,1) chirality in the as-received CNT powder, and in differently processed PAN/CNT fibers, the quality of CNT dispersion can be quickly monitored. PAN/CNT fibers were then subject to single filament straining, with Raman spectra collected as a function of PAN/CNT filament strain. As a result of the PAN/CNT strain, stress induced G’ Raman band shifts were observed in the CNT, indicating successful stress transfer from the surrounding PAN matrix to the dispersed CNT. Utilization of the shear lag theory allows for the calculation of the interfacial shear strength between the PAN and incorporated CNT, which is found to increase as the quality of CNT (higher… Advisors/Committee Members: Kumar, Satish (advisor), Griffin, Anselm (committee member), Shofner, Meisha (committee member), Yao, Donggang (committee member), Zhang, Chuck (committee member).

Subjects/Keywords: Carbon fiber; Carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Newcomb, B. A. (2015). Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54881

Chicago Manual of Style (16^th Edition):

Newcomb, Bradley Allen. “Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber.” 2015. Doctoral Dissertation, Georgia Tech. Accessed February 18, 2020. http://hdl.handle.net/1853/54881.

MLA Handbook (7^th Edition):

Newcomb, Bradley Allen. “Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber.” 2015. Web. 18 Feb 2020.

Vancouver:

Newcomb BA. Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber. [Internet] [Doctoral dissertation]. Georgia Tech; 2015. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1853/54881.

Council of Science Editors:

Newcomb BA. Gel spun PAN and PAN/CNT based carbon fibers: From viscoelastic solution to elastic fiber. [Doctoral Dissertation]. Georgia Tech; 2015. Available from: http://hdl.handle.net/1853/54881

Hong Kong University of Science and Technology

14. Wang, Zhe. Superconductivity in 4-Å carbon nanotube arrays.

Degree: 2011, Hong Kong University of Science and Technology

URL: http://repository.ust.hk/ir/Record/1783.1-7894 ; https://doi.org/10.14711/thesis-b1155302 ; http://repository.ust.hk/ir/bitstream/1783.1-7894/1/th_redirect.html

► The focus of this thesis is the study of superconducting resistive transition in 4-Å carbon nanotube arrays embedded in the aligned, linear pores of AFI… (more)

▼ The focus of this thesis is the study of superconducting resistive transition in 4-Å carbon nanotube arrays embedded in the aligned, linear pores of AFI zeolite crystals. While superconductivity was discovered in this material system one decade ago, resistive transition was not observed at that time owing to inadequate sample quality. The present study remedies this situation with samples fabricated from a new approach. Two types of superconducting resistive behaviors were observed in different selective samples. The first is the quasi one dimensional (1D) fluctuation superconductivity, which exhibits a smooth resistance drop with decreasing temperature, initiating at 15 K. At low temperatures, the differential resistance also shows a smooth increase with increasing bias current. Both are not affected by a magnetic field up to 11 Tesla. Such manifestations are consistent with the 1D superconducting characteristics as qualitatively interpreted by the mechanism of thermally activated phase slips, within the framework of the Langer-Ambegaokar-McCumber-Halperin (LAMH) theory. A competing mechanism with the 1D superconductivity, the Peierls distortion, is shown to manifest itself as a differential resistance peak (as a function of the driving current), appearing above a certain temperature. Theoretical calculations suggest the quasi-1D superconducting behavior to arise from thin arrays of (5,0) 4-Å carbon nanotubes, each comprising a central member surrounded by at least six others, with a wall-to-wall separation of ~1 nm as dictated by the molecular structure of the AFI zeolite crystal. These thin (5,0) nanotube arrays plausibly act as the critical electrical links bridging the measuring electrodes. The second type of observed superconducting behavior is the one dimensional (1D) to three dimensional (3D) superconducting crossover transition. In four samples, the transition was observed to initiate at 15 K with a slow resistance decrease switching to a sharp, order of magnitude drop at ~7.5 K. The latter exhibits anisotropic magnetic field dependence, and the differential resistance versus bias current show a rich variety of details that are consistent with the establishment of coherence, in stages, as the temperature is lower below 15 K. In particular, the resistance drop that starts at 7.5 K exhibits attributes that are consistent with the manifestations of a Berezinskii-Kosterlitz-Thouless transition that establishes quasi-long-range order in the plane transverse to the c-axis of the aligned nanotubes, thereby mediating a 1D to 3D crossover. The electrical transport data and their interpretation are supported by the magnetic and specific heat results obtained by the group of Prof. Rolf Lortz.

Subjects/Keywords: Nanotubes ; Carbon ; Carbon composites ; Superconductivity

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wang, Z. (2011). Superconductivity in 4-Å carbon nanotube arrays. (Thesis). Hong Kong University of Science and Technology. Retrieved from http://repository.ust.hk/ir/Record/1783.1-7894 ; https://doi.org/10.14711/thesis-b1155302 ; http://repository.ust.hk/ir/bitstream/1783.1-7894/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Zhe. “Superconductivity in 4-Å carbon nanotube arrays.” 2011. Thesis, Hong Kong University of Science and Technology. Accessed February 18, 2020. http://repository.ust.hk/ir/Record/1783.1-7894 ; https://doi.org/10.14711/thesis-b1155302 ; http://repository.ust.hk/ir/bitstream/1783.1-7894/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Zhe. “Superconductivity in 4-Å carbon nanotube arrays.” 2011. Web. 18 Feb 2020.

Vancouver:

Wang Z. Superconductivity in 4-Å carbon nanotube arrays. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2011. [cited 2020 Feb 18]. Available from: http://repository.ust.hk/ir/Record/1783.1-7894 ; https://doi.org/10.14711/thesis-b1155302 ; http://repository.ust.hk/ir/bitstream/1783.1-7894/1/th_redirect.html.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang Z. Superconductivity in 4-Å carbon nanotube arrays. [Thesis]. Hong Kong University of Science and Technology; 2011. Available from: http://repository.ust.hk/ir/Record/1783.1-7894 ; https://doi.org/10.14711/thesis-b1155302 ; http://repository.ust.hk/ir/bitstream/1783.1-7894/1/th_redirect.html

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science

15. Arya, Ved Prakash. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.

Degree: 2012, Indian Institute of Science

URL: http://hdl.handle.net/2005/2325

► Studies on charge transport properties in carbon nanotubes (CNTs) have been a subject of great interest for a long time not only as an important… (more)

▼ Studies on charge transport properties in carbon nanotubes (CNTs) have been a subject of great interest for a long time not only as an important topic in fundamental science, but also as a basic requirement for the application of CNTs for nanoelectronics. CNTs show a wide range of transport behavior that varies from ballistic to hopping regime, depending on the dimensionality and nature of disorder in the system. Minute variations in disorder can lead from weak to strong localization, and this yields complex and intriguing features in the analysis of transport data. It is particularly important to carry out such a study for multiwall carbon nanotubes (MWCNTs), in which both dimensionality and disorder play an important role and the nature of localization is non-trivial as wave functions are extended along the tube or bundle of tubes. A proper understanding of the mechanisms of charge transport and their quantitative knowledge is an essential requirement for any possible application of CNTs in nanodevices. Such studies not only yield information on the transport parameters crucial for applications but can also provide a test for any possible microscopic theories of transport. Main focus of the current thesis is to understand the mechanism of charge transport in iron-embedded MWCNTs and to gain more knowledge on the transport behavior. Magnetically functionalized CNTs, in particular the CNTs ﬁlled with ferromagnetic materials are of profound interest for the basic scientiﬁc research as well as for technological application. Iron-embedded MWCNTs are synthesized by one step pyrolysis method. This method gives a proper route to synthesize the magnetic particles encapsulated CNTs. Beyond the geometrical advantage of a cylinder-shaped nanostructure design, the carbon shells provide an effective protection against oxidation of magnetic nanoparticles. The iron-embedded MWCNTs exhibit excellent magnetic properties like the uniaxial magnetic anisotropy, and the high coercivity, which is larger than the coercivity of bulk iron. Thus, they have signiﬁcant potential for data storage devices and biomedical applications. Vertical alignment of CNTs is an important issue for device applications such as field electron emitters and flat-panel displays. Vertically aligned MWCNTs are grown on various substrates in the present work and the role of catalyst particles in vertical alignment is discussed. This thesis also reports the investigations on the magnetic properties including magnetotransport studies. The thesis is organized in seven chapters and a brief summary of each chapter is given below. Chapter 1 presents an introduction of the CNTs and its structural and electronic properties. Charge transport in CNTs is then discussed in terms of the fundamental aspects of conduction regimes and transport length scales. The synthesis and characterization of iron-embedded MWCNTs is described in chapter 2. It is important to get good quality CNTs in a scalable way. The various methods available for CNT synthesis are arc discharge, laser… Advisors/Committee Members: Prasad, V, Anil Kumar, P S.

Subjects/Keywords: Carbon Nanotubes (CNTs); Multiwall Carbon Nanotubes; Nanotechnology; Carbon Nanotubes - Charge Transport; Carbon Nanotubes - Magnetic Properties; Iron-embedded Multiwall Carbon Nanotubes; Multiwall Carbon Nanotubes Mat; Multiwall Carbon Nanotubes (MWCNTs); Nanotechnology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Arya, V. P. (2012). Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/2325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2012. Thesis, Indian Institute of Science. Accessed February 18, 2020. http://hdl.handle.net/2005/2325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2012. Web. 18 Feb 2020.

Vancouver:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Internet] [Thesis]. Indian Institute of Science; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/2005/2325.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Thesis]. Indian Institute of Science; 2012. Available from: http://hdl.handle.net/2005/2325

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science

16. Arya, Ved Prakash. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.

Degree: 2012, Indian Institute of Science

URL: http://etd.iisc.ernet.in/handle/2005/2325 ; http://etd.ncsi.iisc.ernet.in/abstracts/2990/G25281-Abs.pdf

► Studies on charge transport properties in carbon nanotubes (CNTs) have been a subject of great interest for a long time not only as an important… (more)

▼ Studies on charge transport properties in carbon nanotubes (CNTs) have been a subject of great interest for a long time not only as an important topic in fundamental science, but also as a basic requirement for the application of CNTs for nanoelectronics. CNTs show a wide range of transport behavior that varies from ballistic to hopping regime, depending on the dimensionality and nature of disorder in the system. Minute variations in disorder can lead from weak to strong localization, and this yields complex and intriguing features in the analysis of transport data. It is particularly important to carry out such a study for multiwall carbon nanotubes (MWCNTs), in which both dimensionality and disorder play an important role and the nature of localization is non-trivial as wave functions are extended along the tube or bundle of tubes. A proper understanding of the mechanisms of charge transport and their quantitative knowledge is an essential requirement for any possible application of CNTs in nanodevices. Such studies not only yield information on the transport parameters crucial for applications but can also provide a test for any possible microscopic theories of transport. Main focus of the current thesis is to understand the mechanism of charge transport in iron-embedded MWCNTs and to gain more knowledge on the transport behavior. Magnetically functionalized CNTs, in particular the CNTs ﬁlled with ferromagnetic materials are of profound interest for the basic scientiﬁc research as well as for technological application. Iron-embedded MWCNTs are synthesized by one step pyrolysis method. This method gives a proper route to synthesize the magnetic particles encapsulated CNTs. Beyond the geometrical advantage of a cylinder-shaped nanostructure design, the carbon shells provide an effective protection against oxidation of magnetic nanoparticles. The iron-embedded MWCNTs exhibit excellent magnetic properties like the uniaxial magnetic anisotropy, and the high coercivity, which is larger than the coercivity of bulk iron. Thus, they have signiﬁcant potential for data storage devices and biomedical applications. Vertical alignment of CNTs is an important issue for device applications such as field electron emitters and flat-panel displays. Vertically aligned MWCNTs are grown on various substrates in the present work and the role of catalyst particles in vertical alignment is discussed. This thesis also reports the investigations on the magnetic properties including magnetotransport studies. The thesis is organized in seven chapters and a brief summary of each chapter is given below. Chapter 1 presents an introduction of the CNTs and its structural and electronic properties. Charge transport in CNTs is then discussed in terms of the fundamental aspects of conduction regimes and transport length scales. The synthesis and characterization of iron-embedded MWCNTs is described in chapter 2. It is important to get good quality CNTs in a scalable way. The various methods available for CNT synthesis are arc discharge, laser… Advisors/Committee Members: Prasad, V, Anil Kumar, P S.

Subjects/Keywords: Carbon Nanotubes (CNTs); Multiwall Carbon Nanotubes; Nanotechnology; Carbon Nanotubes - Charge Transport; Carbon Nanotubes - Magnetic Properties; Iron-embedded Multiwall Carbon Nanotubes; Multiwall Carbon Nanotubes Mat; Multiwall Carbon Nanotubes (MWCNTs); Nanotechnology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Arya, V. P. (2012). Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/handle/2005/2325 ; http://etd.ncsi.iisc.ernet.in/abstracts/2990/G25281-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2012. Thesis, Indian Institute of Science. Accessed February 18, 2020. http://etd.iisc.ernet.in/handle/2005/2325 ; http://etd.ncsi.iisc.ernet.in/abstracts/2990/G25281-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2012. Web. 18 Feb 2020.

Vancouver:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Internet] [Thesis]. Indian Institute of Science; 2012. [cited 2020 Feb 18]. Available from: http://etd.iisc.ernet.in/handle/2005/2325 ; http://etd.ncsi.iisc.ernet.in/abstracts/2990/G25281-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Thesis]. Indian Institute of Science; 2012. Available from: http://etd.iisc.ernet.in/handle/2005/2325 ; http://etd.ncsi.iisc.ernet.in/abstracts/2990/G25281-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg

17. Mhlanga, Nikiwe. The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste.

Degree: 2012, University of Johannesburg

URL: http://hdl.handle.net/10210/4674

►

M.Sc.

Radionuclides exist in the environment because of natural and human activities that are an essential part of our lives. Nuclear processing, medicinal applications (using… (more)

▼

M.Sc.

Radionuclides exist in the environment because of natural and human activities that are an essential part of our lives. Nuclear processing, medicinal applications (using isotopes) and electric power production by nuclear stations are few examples of human activities that result in production of radioactive waste (RAW). The nuclear power stations in our world have to store their waste in such a manner that the present and future generations are protected from harmful radiations and this is a challenge. Exposure to RAW can result in severe, diverse and irreversible consequences such as damage of the ecosystem, pollution, cancers, birth mutations, to mention just a few. Solvent extraction (SE) technique is currently used to purify large volumes of secondary liquid waste before they are released to the environment or stored. However, even after the SE purification, highly radioactive liquid waste is given off. This highly radioactive liquid waste is solidified in a glass matrix (vitrification). In an attempt to reduce the disposal of large volumes of secondary RAW generated during the purification technology, this study was initiated to investigate the possibility of using multiwalled carbon nanotubes (MWCNTs) as part of the SE technique. As the main nuclear liquid extraction processes involve tributyl phosphate (TBP), the MWCNTs were linked to TBP, polymerised to give a MWCNTs-TBP polymer that was tested in the nuclear environment. This polymer should possess good chelating properties due to the inclusion of the phosphate and should be a good absorbent as MWCNTs are promising absorbent carbon materials. To test the hypothesis of the study MWCNTs-TBP polymer was tested for uranium extraction. The MWCNTs-TBP polymer gave a zero Kd value which indicates that the adsorption capacity of the polymer to remove radionuclides from waste streams was not successful. The MWCNTs were then tested for iodine-131 extraction whereby they were compared with single walled carbon nanotubes (SWCNTs) and double walled carbon nanotubes (DWCNTs). In this test SWCNTs gave a Kd value of 81694 mL/g which proved that they can be used in nuclear waste applications.

Subjects/Keywords: Radioactive wastes; Nanotubes; Carbon nanotubes; Phosphorylation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mhlanga, N. (2012). The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/4674

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mhlanga, Nikiwe. “The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste.” 2012. Thesis, University of Johannesburg. Accessed February 18, 2020. http://hdl.handle.net/10210/4674.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mhlanga, Nikiwe. “The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste.” 2012. Web. 18 Feb 2020.

Vancouver:

Mhlanga N. The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10210/4674.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mhlanga N. The synthesis, characterisation and application of phosphorylated multiwalled carbon nanotubes for the treatment of radioactive waste. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/4674

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North Carolina State University

18. Wilson, Heather Lynn. Model Development for Nanotube-Infused Polyimides.

Degree: PhD, Applied Mathematics, 2009, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/5523

► Polyimides are a class of polymers that are thermally and chemically stable and radiation resistant. In addition to their stability, polyimides possess a relatively large… (more)

▼ Polyimides are a class of polymers that are thermally and chemically stable and radiation resistant. In addition to their stability, polyimides possess a relatively large elastic modulus and are Ã¯Â¬â€šexible. Their stability and stiffness make them good candidates for use in space applications. However, due to their insulating nature, static charge build-up can deteriorate the structure. This charge build-up can be mitigated by embedding single-wall nanotubes (SWNTs) into the polyimide. SWNTs are excellent conductors and have a high elastic modulus. Thus, embedding the SWNTs into the polyimide not only introduces conductivity but also increases the stiffness of the composite. SWNTs can also be added to create an active structure from inactive polyimides. Nanocomposites are being investigated for use in constructing large ultra-lightweight (gossamer) spacecraft. Since the gossamer spacecraft is folded and packed into the launch vehi- cle prior to launch, the materials need to withstand this process. The nanotube-infused polyimides are Ã¯Â¬â€šexible enough to withstand the packaging process and strong enough to withstand the harsh space environment. SpeciÃ¯Â¬Â c applications of the gossamer spacecraft include thin-Ã¯Â¬Â lm membrane mirrors and gossamer antennas. Nanotube composites have been modeled in the past using a variety of techniques. How- ever, much of the previous work focused on modeling the elastic modulus at a set temperature. Since temperatures widely vary in space, a temperature-dependent model is required for the elastic modulus. In this work, we present a temperature-dependent continuum material model, based on phenomenological elasticity theory, which characterizes stiffness through the material as a func- tion of varying concentrations of nano-inclusions. Attributes of the model are illustrated through comparison with experimental data for the polyimide (ÃŽÂ² -CN)-APB/ODPA and LARC-CP2. In Chapters 5 and 6, system models are developed and implemented for 1D and 2D nanotube-infused membranes under tension. Advisors/Committee Members: Dr. Mansoor Haider, Committee Member (advisor), Dr. Michael Shearer, Committee Member (advisor), Dr. Hien Tran, Committee Member (advisor), Dr. Ralph Smith, Committee Chair (advisor).

Subjects/Keywords: single wall nanotubes; polyimides; carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wilson, H. L. (2009). Model Development for Nanotube-Infused Polyimides. (Doctoral Dissertation). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/5523

Chicago Manual of Style (16^th Edition):

Wilson, Heather Lynn. “Model Development for Nanotube-Infused Polyimides.” 2009. Doctoral Dissertation, North Carolina State University. Accessed February 18, 2020. http://www.lib.ncsu.edu/resolver/1840.16/5523.

MLA Handbook (7^th Edition):

Wilson, Heather Lynn. “Model Development for Nanotube-Infused Polyimides.” 2009. Web. 18 Feb 2020.

Vancouver:

Wilson HL. Model Development for Nanotube-Infused Polyimides. [Internet] [Doctoral dissertation]. North Carolina State University; 2009. [cited 2020 Feb 18]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/5523.

Council of Science Editors:

Wilson HL. Model Development for Nanotube-Infused Polyimides. [Doctoral Dissertation]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/5523

Nelson Mandela Metropolitan University

19. Gumede, Jabulani Innocent. Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends.

Degree: 2019, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/39675

► Mechanical and thermal processes are the preferred methods used to reclaim rubber from waste tyres. However, these methods produce reclaimed rubber (RR) with poor quality… (more)

▼ Mechanical and thermal processes are the preferred methods used to reclaim rubber from waste tyres. However, these methods produce reclaimed rubber (RR) with poor quality and lowered properties compared to virgin rubber. As a result, RR is commonly blended with virgin natural rubber (NR) in order to enhance its quality and properties to widen its application scope. The use of RR in the production of new rubber products is however limited to only about 1-10%. This is because the amounts of RR above this percentage negatively affect the properties of the resultant RR/NR blends. Researchers have used various conventional and nonconventional fillers such as carbon black and maize stalk fibres, respectively, in an attempt to enhance the properties of RR/NR blends. One main disadvantage with the use of these fillers is the need for high quantities to achieve desired properties. Several researchers have therefore focused on developing other reinforcing fillers. The fillers that have recently attracted a lot of attention of the present researchers include single-walled carbon nanotubes (SWCNTs), which are very small tubes solely made up of carbon molecules. This is because SWCNTs offer many impressive properties, and even small quantity of these nanofillers is sufficient to achieve desired properties due to their small size, large surface area and high aspect ratio. The main challenge with the use of SWCNTs however is getting them to disperse well in the rubber matrix. Therefore, their surface is either modified and then mixed with rubber or a dispersant is used to disperse them in the rubber matrix, forming a masterbatch. The common nanomaterial masterbatch product for applications in rubber is the TUBALLTM RUBBER (TR), which is a masterbatch product consisting of 1 wt. % TUBALL™ SWCNTs dispersed, using 1.5 wt.% sulfonol as a dispersant, in 97.5 wt.% NR (from latex Taytex FA). This product is a versatile masterbatch designed to enhance the mechanical, chemical, electrical and thermal properties of rubbers since it contains SWCNTs. However, the performance of this product has not been explored in the cases where recycled/reclaimed rubber is used. The main aim of this project was therefore to explore the effect of SWCNTs (via using TR) in the formulations of RR/virgin NR blends. This project was divided into two parts; (i) optimisation of SWCNTs based on tensile properties of specific formulations of compounds. These compounds were prepared by mixing various amounts of TR and NR using a Banbury internal mixer and two-roll mill. (ii) the effect of the addition of SWCNTs from the optimum SWCNTs/NR masterbatch compound on curing, mechanical, aging, dynamic mechanical and thermal properties of RR/NR blends was studied. Curing properties explored include minimum torque (ML), maximum torque (MH), scorch time (ts0.5), curing time (t90) and cure rate. Mechanical properties studied are tensile strength, modulus at 100%, 200%, 300% and 500% elongation, elongation at break, hardness and resilience. Dynamic mechanical properties include…

Subjects/Keywords: Carbon nanotubes; Nanotubes; Nanostructured materials; Polymers

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gumede, J. I. (2019). Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/39675

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gumede, Jabulani Innocent. “Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends.” 2019. Thesis, Nelson Mandela Metropolitan University. Accessed February 18, 2020. http://hdl.handle.net/10948/39675.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gumede, Jabulani Innocent. “Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends.” 2019. Web. 18 Feb 2020.

Vancouver:

Gumede JI. Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2019. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10948/39675.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gumede JI. Effect of single-walled carbon nanotubes on various properties of reclaimed rubber/natural rubber blends. [Thesis]. Nelson Mandela Metropolitan University; 2019. Available from: http://hdl.handle.net/10948/39675

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Indian Institute of Science

20. Mahanandia, Pitamber. Synthesis, Characterization and Electrical Transport In Carbon Nanotubes.

Degree: 2007, Indian Institute of Science

URL: http://hdl.handle.net/2005/1336

► In this thesis, synthesis, characterization and electrical transport of Carbon nanotubes (CNTs) have been discussed. The first chapter contains a brief introduction of various forms… (more)

▼ In this thesis, synthesis, characterization and electrical transport of Carbon nanotubes (CNTs) have been discussed. The first chapter contains a brief introduction of various forms of carbon including CNT. The CNTs are currently the materials of intense research interest due to their remarkable mechanical and electrical properties. CNTs can be visualized as a graphene sheet that has been rolled into a seamless tube. CNTs are either single-walled carbon nanotubes (SWCNT) or multi-walled carbon nanotubes (MWCNT). SWCNT is a tube with only one wall and MWCNT has many coaxial tubes and weak Van der Waal forces hold them together. The properties depend on chirality, diameter and length of the tubes. Chirality is defined by the symmetry and the chiral angle formed between the carbon bonds. The atomic structure of CNTs is described in terms of the tube chirality, which is defined by the chiral vector Ch and the chiral angle . The chiral vector is Ch = na1 + ma2, where the integers (n, m) are the number of steps along the zig-zag carbon. Depending on the tube chirality the electrical properties of the CNTs differ; they can be metallic or semiconducting. When n-m = 3p, where p is an integer, the CNTs are metallic and when n-m  3p, the CNTs are semiconducting. Due to the high anisotropy and high aspect ratio, CNTs have many potential applications with great technological importance such as functionalized molecules, conductive wires, bearings of rotational motors, field emitters, hydrogen storage, sensors, polymer composites, nanotube yarn and nanotube filters, X-ray generator, electron sources for microscopy and lithography, gas discharge tubes and vacuum microwave amplifiers, etc. The first chapter gives a brief introduction about various forms of carbon and their properties, particularly of CNTs. The nature of the CNTs depends on the method of production, which controls the degree of graphitization, the tube diameter and the chirality. Most synthesis methods originate from the idea of obtaining adequately active carbon atomic species or clusters from carbon sources and assembling them into CNTs without or with catalysts. The commonly used methods for the synthesis of carbon nanotubes are arc-discharge, Laser ablation, high-pressure catalytic decomposition of carbon monoxide (HiPCO), electrophoretic deposition (EPD), flame synthesis, pyrolysis, chemical vapour deposition (CVD), hot-filament CVD, plasma enhanced chemical vapour deposition (PECVD) using DC, RF, and micro wave power sources, hot-filament dc (HF-dc PECVD), inductively coupled plasma (ICPECVD) and electron cyclotron resonance (ECR PECVD). Although many efforts have been made to develop various synthesis methods, most of them require many steps. Moreover, the complicated and rigorous control of parameters and expensive materials are unavoidable that has put limitation in reproducing the same in large scale. In this chapter, a simple method for the synthesis of CNTs on a large scale that eliminates nearly the entire complex and expensive machinery associated… Advisors/Committee Members: Subramanyam, S V.

Subjects/Keywords: Carbon Nanotubes; Entangled Carbon Nanotubes; Aligned Carbon Nanotubes; Nanoribbons; Carbon Nanotubes - Synthesis; Carbon Nanotubes - Electrical Transport; Carbon Source Materials; Carbon Nanorods; Pyrolysis; Carbon Films; Materials Science

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mahanandia, P. (2007). Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. (Thesis). Indian Institute of Science. Retrieved from http://hdl.handle.net/2005/1336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mahanandia, Pitamber. “Synthesis, Characterization and Electrical Transport In Carbon Nanotubes.” 2007. Thesis, Indian Institute of Science. Accessed February 18, 2020. http://hdl.handle.net/2005/1336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mahanandia, Pitamber. “Synthesis, Characterization and Electrical Transport In Carbon Nanotubes.” 2007. Web. 18 Feb 2020.

Vancouver:

Mahanandia P. Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. [Internet] [Thesis]. Indian Institute of Science; 2007. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/2005/1336.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mahanandia P. Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. [Thesis]. Indian Institute of Science; 2007. Available from: http://hdl.handle.net/2005/1336

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

21. Aitkaliyeva, Assel. Irradiation Stability of Carbon Nanotubes.

Degree: 2010, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-3251

► Ion irradiation of carbon nanotubes is a tool that can be used to achieve modification of the structure. Irradiation stability of carbon nanotubes was studied… (more)

Subjects/Keywords: Carbon Nanotubes; Electron Irradiation; Ion Irradiation; Raman Spectroscopy of carbon nanotubes; Resistivity of Carbon Nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aitkaliyeva, A. (2010). Irradiation Stability of Carbon Nanotubes. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-3251

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Aitkaliyeva, Assel. “Irradiation Stability of Carbon Nanotubes.” 2010. Thesis, Texas A&M University. Accessed February 18, 2020. http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-3251.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Aitkaliyeva, Assel. “Irradiation Stability of Carbon Nanotubes.” 2010. Web. 18 Feb 2020.

Vancouver:

Aitkaliyeva A. Irradiation Stability of Carbon Nanotubes. [Internet] [Thesis]. Texas A&M University; 2010. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-3251.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Aitkaliyeva A. Irradiation Stability of Carbon Nanotubes. [Thesis]. Texas A&M University; 2010. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2009-08-3251

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Dundee

22. Goher, Qammar Sultan. A study of carbon based materials for energy applications.

Degree: PhD, 2012, University of Dundee

URL: http://hdl.handle.net/10588/258fe8ab-2e3c-4204-96db-1fc17fce0278

► Carbon based materials such as CNTs and graphene have been widely studied over the last few years. The outstanding electrical and mechanical properties of these… (more)

▼ Carbon based materials such as CNTs and graphene have been widely studied over the last few years. The outstanding electrical and mechanical properties of these materials attracted researchers to find ways to grow and use them in nano-devices. Among the different techniques, PECVD is a relatively simple and low temperature process. It facilitates the growth of CNTs and graphene on particular sites of the substrate. The objective of this research project was to study the growth of CNTs and graphene using PECVD system and to employ them in renewable energy devices. Excimer laser processed materials were also the focus for flexible material for fuel cells and other applications to show the way to a one step manufacturing process that lends itself to large area and low cost processing using standard tools.In the growth of CNTs, the roll of a buffer layer and catalyst materials were studied in depth. Different metals were tested for best results in optimising nanotube growth for the selected applications. The role of the buffer layer in the formation of nanoparticles and their surface adhesion was studied. Different materials were used as a catalyst and analysed for best performance in the PECVD system. Growth parameters such as temperature, pressure, gas flow rate and plasma power were studied during the growth of CNTs in the PECVD system. The growth of graphene has been conducted in two ways: firstly, by the traditional mechanical exfoliation technique (with the help of Manchester University) and second by PECVD techniques.Polymer materials are promising flexible substrates for electronic and energy devices. An excimer laser was used to transform thin metallic films into nanoparticles which could play the role of the catalyst in proton exchange membrane fuel cells. In this study experiments have been conducted into a single step process to convert the poly ethylene naphthalate (PEN) surface to a robust mesoporous carbon material that conducts electrons, whilst depositing the catalyst. Such a technique has been developed for the first time in this work. Laser modification here produced a conical carbon structure and dense arrays of well defined catalysts.A prototype fuel cell was designed and crafted to employ the laser processed PEN as a proton exchange membrane. Some experiments were conducted regarding the transport of protons through laser processed PEN and the conventionally used fuel cell electrolyte, Nafion. It has been observed that the hydrophilic property of Nafion allowed proton transport across this material. It was also observed that PEN is not a good membrane for protonic transport. This material does not have free sites for vehicle transport. The catalytic activity of laser ablated Ni nanoparticles on PEN substrate was studied in temperature programme reaction (TPR) and it was observed that the metallic nanoparticles had some activity at higher temperature. Both Ni and Pt nanoparticles were tested as catalysts on the standard Nafion electrolyte. It was observed that Pt is active for the hydrogen combustion…

Subjects/Keywords: 620.112; Carbon nanotubes and graphene

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Goher, Q. S. (2012). A study of carbon based materials for energy applications. (Doctoral Dissertation). University of Dundee. Retrieved from http://hdl.handle.net/10588/258fe8ab-2e3c-4204-96db-1fc17fce0278

Chicago Manual of Style (16^th Edition):

Goher, Qammar Sultan. “A study of carbon based materials for energy applications.” 2012. Doctoral Dissertation, University of Dundee. Accessed February 18, 2020. http://hdl.handle.net/10588/258fe8ab-2e3c-4204-96db-1fc17fce0278.

MLA Handbook (7^th Edition):

Goher, Qammar Sultan. “A study of carbon based materials for energy applications.” 2012. Web. 18 Feb 2020.

Vancouver:

Goher QS. A study of carbon based materials for energy applications. [Internet] [Doctoral dissertation]. University of Dundee; 2012. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10588/258fe8ab-2e3c-4204-96db-1fc17fce0278.

Council of Science Editors:

Goher QS. A study of carbon based materials for energy applications. [Doctoral Dissertation]. University of Dundee; 2012. Available from: http://hdl.handle.net/10588/258fe8ab-2e3c-4204-96db-1fc17fce0278

University of Georgia

23. Shim, Jihye. Spectroscopic and scanning probe studies of single-walled carbon nanotubes.

Degree: PhD, Chemistry, 2009, University of Georgia

URL: http://purl.galileo.usg.edu/uga_etd/shim_jihye_200908_phd

► The main topic of this dissertation is the spectroscopic and scanning probe studies of single-walled carbon nanotubes (SWNTs). Current synthetic methods for SWNT growth have… (more)

Subjects/Keywords: Single-walled carbon nanotubes (SWNTs)

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shim, J. (2009). Spectroscopic and scanning probe studies of single-walled carbon nanotubes. (Doctoral Dissertation). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/shim_jihye_200908_phd

Chicago Manual of Style (16^th Edition):

Shim, Jihye. “Spectroscopic and scanning probe studies of single-walled carbon nanotubes.” 2009. Doctoral Dissertation, University of Georgia. Accessed February 18, 2020. http://purl.galileo.usg.edu/uga_etd/shim_jihye_200908_phd.

MLA Handbook (7^th Edition):

Shim, Jihye. “Spectroscopic and scanning probe studies of single-walled carbon nanotubes.” 2009. Web. 18 Feb 2020.

Vancouver:

Shim J. Spectroscopic and scanning probe studies of single-walled carbon nanotubes. [Internet] [Doctoral dissertation]. University of Georgia; 2009. [cited 2020 Feb 18]. Available from: http://purl.galileo.usg.edu/uga_etd/shim_jihye_200908_phd.

Council of Science Editors:

Shim J. Spectroscopic and scanning probe studies of single-walled carbon nanotubes. [Doctoral Dissertation]. University of Georgia; 2009. Available from: http://purl.galileo.usg.edu/uga_etd/shim_jihye_200908_phd

Texas A&M University

24. Gomez Ballesteros, Jose Leonardo. Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes.

Degree: 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161426

► Various aspects of the catalytic synthesis of single-walled carbon nanotubes (SWCNTs) on transition metal nanoparticles were studied by combining atomistic simulations: reactive molecular dynamics (RMD),… (more)

Subjects/Keywords: Single-Walled Carbon Nanotubes; Catalysts

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gomez Ballesteros, J. L. (2017). Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161426

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gomez Ballesteros, Jose Leonardo. “Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes.” 2017. Thesis, Texas A&M University. Accessed February 18, 2020. http://hdl.handle.net/1969.1/161426.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gomez Ballesteros, Jose Leonardo. “Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes.” 2017. Web. 18 Feb 2020.

Vancouver:

Gomez Ballesteros JL. Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes. [Internet] [Thesis]. Texas A&M University; 2017. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.1/161426.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gomez Ballesteros JL. Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes. [Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161426

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

25. Moriarty, Gregory P. Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites.

Degree: 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/151038

► Numerous alternative energy sources are being researched for sustainable energy applications, but their overall benefit is still too costly for them to be considered viable.… (more)

▼ Numerous alternative energy sources are being researched for sustainable energy applications, but their overall benefit is still too costly for them to be considered viable. Commonly produced temperature gradients created by the environment, or are man-made, can be converted into useful energy by using thermoelectric materials. Inorganic semiconductors are the most commonly used thermoelectric materials, but have raised concerns due to toxicity issues, rarity of heavy elements used, and high fabrication temperatures. These concerns have led research efforts into electrically conductive polymer composites prepared in ambient conditions from aqueous solutions. By combining polymer latex with carbon nanotubes (CNT), electrical conductivity can resemble metals while thermal conductivity remains similar to polymers. Using different CNT stabilizers for these fully organic composites can tailor the thermoelectric properties and harvest thermal gradients from previously inconceivable places (e.g., body heat converted into a voltage). A semiconducting CNT stabilizer, meso-tetra(4-carboxyphenyl) porphine (TCPP), was used to investigate the influence stabilizers have on composite thermoelectric properties. As TCPP was compared to a similar system containing an insulating stabilizer, sodium deoxycholate (DOC), the multi-walled carbon nanotube (MWNT)-filled composites showed a 5x increase in the Seebeck coefficient (S). TCPP did not have a distinct effect on the electrical conductivity (?), demonstrating the tailorability of S with this molecule. An intrinsically conductive polymer, poly(3,4-ethylenedioxythiophene) :poly(styrene sulfonate) (PEDOT:PSS), was used to stabilize highly conductive double-walled carbon nanotubes (DWNT) and demonstrate the promise of fully organic composites as thermoelectric materials. This combination of CNT and stabilizer produced metallic electrical conductivity (200,000 S m-1) and power factors (S2?) within an order of magnitude of commonly used semiconductors (~400 ?W m-1 K-2). Electrical conductivity was doubled by stabilizing single-walled carbon nanotubes (SWNT) with PEDOT:PSS in a thin film without the insulating polymer latex. To further demonstrate the tailorability of polymer composites, a dual stabilizer approach using semiconducting and intrinsically conductive stabilizers was used. This approach effectively provided the high electrical conductivity from PEDOT:PSS and the enhanced Seebeck coefficients of TCPP. By using multiple stabilizers for CNTs within the same composite, power factors among the highest reported for fully organic composites are achieved (~500 ?W m-1 K-2). These water-based, flexible composites are becoming real competition as their conversion efficiencies, when normalized by density, are similar to commonly used semiconductors. Advisors/Committee Members: Grunlan, Jaime C. (advisor), Arroyave, Raymundo (committee member), Hartwig, Karl T. (committee member), Yu, Choongho (committee member).

Subjects/Keywords: Thermoelectric; Polymer Composite; Carbon Nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Moriarty, G. P. (2013). Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Moriarty, Gregory P. “Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites.” 2013. Thesis, Texas A&M University. Accessed February 18, 2020. http://hdl.handle.net/1969.1/151038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Moriarty, Gregory P. “Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites.” 2013. Web. 18 Feb 2020.

Vancouver:

Moriarty GP. Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites. [Internet] [Thesis]. Texas A&M University; 2013. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/1969.1/151038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Moriarty GP. Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites. [Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/151038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Chi, Su chih. Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension.

Degree: 2014, Johns Hopkins University

URL: http://jhir.library.jhu.edu/handle/1774.2/37038

► The integration of materials science and engineering at the nanoscale has significant impact in many areas of science and technology. In this dissertation, I will… (more)

▼ The integration of materials science and engineering at the nanoscale has significant impact in many areas of science and technology. In this dissertation, I will present novel syntheses of lanthanum telluride thermoelectric materials, vertically-aligned nanowires, and nanoporous nickel membranes. I will also present a method that can collect industrially relevant quantity of purified and sorted metallic and semiconducting single-walled carbon nanotubes (SWCNTs) in a mixed-carbon nanotubes suspension by AC dielectrophoresis. In the Chapter 1: A Novel Approach to Synthesize Lanthanum Telluride Thermoelectric Materials, I will report on the electrochemical synthesis of lanthanum telluride thin films. The electrodeposition of lanthanum telluride thin films is performed in a room-temperature ionic liquid, 1-ethyl-3-methylimidazolium bromide (EMIB), in ambient conditions. This novel procedure can serve as an alternative means of simple, inexpensive, and laboratory-environment friendly methods to synthesize rare-earth telluride thermoelectric materials that were difficult to make in aqueous solution. Characterization of the morphologies and chemical compositions of the deposited films using scanning electron microscopy (SEM), x-ray diffractometry (XRD), and energy-dispersive x-ray analysis (EDAX) will be presented. The Seebeck coefficient and electrical resistivity of deposited lanthanum telluride thin films will also be presented and compared with those of current state-of-the-art thermoelectric materials. In the Chapter 2: Synthesis and Characterization of Vertically-aligned Gold Nanowires Arrays Ferromagnetic Composite Films, I will report on the electrochemical synthesis of films composed of vertically-aligned gold nanowire arrays in ferromagnetic matrices (nickel and iron). This process involves first electrodepositing the Au nanowire arrays within commercially available anodic aluminum oxide (AAO) nanoporous membranes. After dissolving the templates, the ferromagnetic matrices are grown around the nanowires to produce the two-phase nanocomposites. In the Chapter 3: A Novel Approach to the Synthesis of Nanochanneled Nickel Films, I will report on an innovative technique to fabricate nickel nanochanneled membranes. This procedure involves transferring and imprinting the nanoporous arrays of the AAO membranes to a nickel film using a template-guided electrochemical etching technique. A detailed discussion of these processing techniques will be shown along with the characterization of the morphology of nickel nanochanneled membranes. Lastly, in the Chapter 4: Purification and Refinement of Single-Walled Carbon Nanotubes (SWCNTs) by AC Dielectrophoresis (DEP), a continuous flow device for purifying and sorting metallic and semiconducting SWCNTs from an initially random mixture of SWCNTs in suspension using AC dielectrophoresis is reported. The separation of two electronic types of SWCNTs takes advantage of the large difference of the relative dielectric constants between metallic and semiconducting SWCNTs with respect to… Advisors/Committee Members: Chien, Chia-Ling (advisor).

Subjects/Keywords: Thermoelectric; Single Walled Carbon Nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chi, S. c. (2014). Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension. (Thesis). Johns Hopkins University. Retrieved from http://jhir.library.jhu.edu/handle/1774.2/37038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chi, Su chih. “Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension.” 2014. Thesis, Johns Hopkins University. Accessed February 18, 2020. http://jhir.library.jhu.edu/handle/1774.2/37038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chi, Su chih. “Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension.” 2014. Web. 18 Feb 2020.

Vancouver:

Chi Sc. Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension. [Internet] [Thesis]. Johns Hopkins University; 2014. [cited 2020 Feb 18]. Available from: http://jhir.library.jhu.edu/handle/1774.2/37038.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chi Sc. Novel Syntheses of Thermoelectric and Nanostructured Materials and a System for Purifying and Sorting Metallic and Semiconducting Single Walled Carbon Nanotubes in a Mixed Tube Suspension. [Thesis]. Johns Hopkins University; 2014. Available from: http://jhir.library.jhu.edu/handle/1774.2/37038

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Hong Kong

27. Lo, Kin-cheung. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.

Degree: PhD, 2014, University of Hong Kong

URL: http://hdl.handle.net/10722/211104

abstract

Chemistry

Doctoral

Doctor of Philosophy

Subjects/Keywords: Carbon nanotubes

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lo, K. (2014). Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. (Doctoral Dissertation). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/211104

Chicago Manual of Style (16^th Edition):

Lo, Kin-cheung. “Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.” 2014. Doctoral Dissertation, University of Hong Kong. Accessed February 18, 2020. http://hdl.handle.net/10722/211104.

MLA Handbook (7^th Edition):

Lo, Kin-cheung. “Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques.” 2014. Web. 18 Feb 2020.

Vancouver:

Lo K. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. [Internet] [Doctoral dissertation]. University of Hong Kong; 2014. [cited 2020 Feb 18]. Available from: http://hdl.handle.net/10722/211104.

Council of Science Editors:

Lo K. Synthesis of carbon nanotube composites and their optoelectronic properties characterized by scanning probe microscopic techniques. [Doctoral Dissertation]. University of Hong Kong; 2014. Available from: http://hdl.handle.net/10722/211104

University of Hong Kong

28. Li, Chi-ho. Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications.

Degree: PhD, 2012, University of Hong Kong

URL: Li, C. [李志豪]. (2012). Synthesis of photosensitizing diblock copolymers for functionalization of carbon nanotubes and their applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786937 ; http://dx.doi.org/10.5353/th_b4786937 ; http://hdl.handle.net/10722/183040

►

Block copolymers containing pendant pyrene, terpyridine and poly(3- hexylthiophene) moieties with different block ratios and chain lengths were synthesized by reversible addition-fragmentation chain transfer (RAFT)… (more)

▼

Block copolymers containing pendant pyrene, terpyridine and poly(3- hexylthiophene) moieties with different block ratios and chain lengths were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. The block copolymers obtained had narrow molecular weight distribution. The applications of these polymers for non-covalent functionalization of carbon nanotubes and in photovoltaic devices were studied. The molecular weight distribution and block sizes of the block copolymers could be controlled quite well. The polydispersities measured were below 1.25. The block copolymers could be functionalized on the surface of CNTs. The functionalized CNTs had an improved dispersing ability and a maximum dispersing ability of 0.30 mgmL-1 in DMF was achieved. The photosensitizing properties of an individual functionalized CNT were studied by conductive atomic force microscopy. In the presence of the photosensitizing unit, the photocurrent was measured to be 6.4 nAμW-1 at 580 nm. This suggests the role of metal complexes in the photosensitizing process in the block copolymer. Poly(3-hexylthiophene)-block-pendant pyrene copolymers were synthesized by Grignard metathesis and RAFT polymerization. Different loadings of the block copolymers functionalized CNT were employed as the electron accepting materials in bulk heterojunction photovoltaic devices. A maximum power conversion efficiency of 0.77 × 10-3 % was achieved for the poly(3- hexylthiophene): 0.5% polymer functionalized CNT devices. The poor efficiency was attributed to the low CNT loadings that limited the electron transport in the devices. The poly(3-hexylthiophene)-block-pendant pyrene copolymer were employed as compatibilizer for poly(3-hexylthiophene): [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) bulk heterojunction photovoltaic devices. With the addition of 20 % of the block copolymer, a maximum power conversion efficiency of 1.62 % could be achieved. The long term stability of the encapsulated photovoltaic devices was studied. There was more than 30 % reduction in the degradation of performance after 30 days when the block copolymer was added as compatibilizer. These results suggested the role of the block copolymer compatibilizers in improving both the photovoltaic performances and stability of the devices. Differential scanning calorimetry results suggested that the improved photovoltaic performances may be attributed to the enhanced compatibility between poly(3- hexylthiophene) and PCBM.

published_or_final_version

Chemistry

Doctoral

Doctor of Philosophy

Subjects/Keywords: Copolymers - Synthesis.; Nanotubes - Carbon content.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, C. (2012). Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications. (Doctoral Dissertation). University of Hong Kong. Retrieved from Li, C. [李志豪]. (2012). Synthesis of photosensitizing diblock copolymers for functionalization of carbon nanotubes and their applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786937 ; http://dx.doi.org/10.5353/th_b4786937 ; http://hdl.handle.net/10722/183040

Chicago Manual of Style (16^th Edition):

Li, Chi-ho. “Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications.” 2012. Doctoral Dissertation, University of Hong Kong. Accessed February 18, 2020. Li, C. [李志豪]. (2012). Synthesis of photosensitizing diblock copolymers for functionalization of carbon nanotubes and their applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786937 ; http://dx.doi.org/10.5353/th_b4786937 ; http://hdl.handle.net/10722/183040.

MLA Handbook (7^th Edition):

Li, Chi-ho. “Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications.” 2012. Web. 18 Feb 2020.

Vancouver:

Li C. Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications. [Internet] [Doctoral dissertation]. University of Hong Kong; 2012. [cited 2020 Feb 18]. Available from: Li, C. [李志豪]. (2012). Synthesis of photosensitizing diblock copolymers for functionalization of carbon nanotubes and their applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786937 ; http://dx.doi.org/10.5353/th_b4786937 ; http://hdl.handle.net/10722/183040.

Council of Science Editors:

Li C. Synthesis of photosensitizing diblock copolymers for functionalizationof carbon nanotubes and their applications. [Doctoral Dissertation]. University of Hong Kong; 2012. Available from: Li, C. [李志豪]. (2012). Synthesis of photosensitizing diblock copolymers for functionalization of carbon nanotubes and their applications. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4786937 ; http://dx.doi.org/10.5353/th_b4786937 ; http://hdl.handle.net/10722/183040

University of Hong Kong

29. Li, Jun. Capacitance measurement of single walled carbon nanotubes.

Degree: M. Phil., 2010, University of Hong Kong

URL: Li, J. [李君]. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4516463 ; http://dx.doi.org/10.5353/th_b4516463 ; http://hdl.handle.net/10722/141923

published_or_final_version

Physics

Master

Master of Philosophy

Advisors/Committee Members: Cui, X.

Subjects/Keywords: Carbon.; Nanotubes.

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, J. (2010). Capacitance measurement of single walled carbon nanotubes. (Masters Thesis). University of Hong Kong. Retrieved from Li, J. [李君]. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4516463 ; http://dx.doi.org/10.5353/th_b4516463 ; http://hdl.handle.net/10722/141923

Chicago Manual of Style (16^th Edition):

Li, Jun. “Capacitance measurement of single walled carbon nanotubes.” 2010. Masters Thesis, University of Hong Kong. Accessed February 18, 2020. Li, J. [李君]. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4516463 ; http://dx.doi.org/10.5353/th_b4516463 ; http://hdl.handle.net/10722/141923.

MLA Handbook (7^th Edition):

Li, Jun. “Capacitance measurement of single walled carbon nanotubes.” 2010. Web. 18 Feb 2020.

Vancouver:

Li J. Capacitance measurement of single walled carbon nanotubes. [Internet] [Masters thesis]. University of Hong Kong; 2010. [cited 2020 Feb 18]. Available from: Li, J. [李君]. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4516463 ; http://dx.doi.org/10.5353/th_b4516463 ; http://hdl.handle.net/10722/141923.

Council of Science Editors:

Li J. Capacitance measurement of single walled carbon nanotubes. [Masters Thesis]. University of Hong Kong; 2010. Available from: Li, J. [李君]. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b4516463 ; http://dx.doi.org/10.5353/th_b4516463 ; http://hdl.handle.net/10722/141923

Anna University

30. Sabarinathan C. Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;.

Degree: Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/39172

►

The focus of this research was to investigate the use of Multi Walled newlineCarbon Nanotubes MWCNTs as reinforcements with pure epoxy for creating newlinemultifunctional material… (more)

Subjects/Keywords: Multi Walled Carbon Nanotubes; Nanocomposite

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

C, S. (2015). Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/39172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

C, Sabarinathan. “Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;.” 2015. Thesis, Anna University. Accessed February 18, 2020. http://shodhganga.inflibnet.ac.in/handle/10603/39172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

C, Sabarinathan. “Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;.” 2015. Web. 18 Feb 2020.

Vancouver:

C S. Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;. [Internet] [Thesis]. Anna University; 2015. [cited 2020 Feb 18]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/39172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

C S. Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/39172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations