subject:(Carbon Nanotubes)

Oregon State University

1. 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

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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 March 01, 2021. http://hdl.handle.net/1957/61687.

MLA Handbook (7^th Edition):

Aspitarte, Lee. “Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices.” 2017. Web. 01 Mar 2021.

Vancouver:

Aspitarte L. Electron-electron Interaction Driven Phenomena in Carbon Nanotube Devices. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2021 Mar 01]. 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

2. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

S Ck. Synthesis characterization and Applications of carbon nanotubes Memory devices and nanocomposite;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Mar 01]. 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

3. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

Boston College

4. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

5. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

White AA. Production and characterisation of hydroxyapatite/multi-walled carbon nanotube composites. [Internet] [Doctoral dissertation]. University of Cambridge; 2010. [cited 2021 Mar 01]. 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

6. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

University of Oklahoma

7. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

Irurzun VM. CONTROLLED GROWTH AND METROLOGY OF CARBON NANOTUBES ON SUPPORTED Co-Mo CATALYSTS. [Internet] [Doctoral dissertation]. University of Oklahoma; 2011. [cited 2021 Mar 01]. 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

Vanderbilt University

8. Douglas, Anna Elisabeth. Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications.

Degree: PhD, Interdisciplinary Materials Science, 2019, Vanderbilt University

URL: http://hdl.handle.net/1803/11370

► In order to preserve long-term human sustainability on Earth, many researchers have focused significant efforts towards developing technologies that 1) decrease greenhouse gas emissions, and… (more)

▼ In order to preserve long-term human sustainability on Earth, many researchers have focused significant efforts towards developing technologies that 1) decrease greenhouse gas emissions, and 2) utilize atmospheric carbon dioxide as a feedstock gas for the production of materials, chemicals, and fuels. While Li-ion batteries have emerged as an ideal technology to reduce emissions through electric vehicles and the storage of renewably-generated energy for electricity, the current cost of Li-ion batteries today limits widespread integration. This cost is fueled mainly by the low earth abundance and high processing cost of Li-ion materials. In this dissertation, I focus on the use of low-cost and earth abundant materials for both Li- and Na- ion battery applications. A platform for the capture and conversion of atmospheric CO2 into solid carbon structures is developed, with an emphasis on the catalytic growth of carbon nanotubes (CNTs) through electrochemical routes. Small diameter CNTs are synthesized through the development of an inert anode capable of activating catalytic particles present at the cathode-electrolyte interface, and careful study of dynamic catalytic processes leads to the first mechanistic understandings of electrochemical CNT growth from CO2. Phenomena such as catalyst size dictating the structure of CNTs synthesized and Ostwald ripening of catalysts over time are studied, and electrochemical “pinning” of catalytic particles through the use of high current pulses is demonstrated to drive the formation of small-diameter CNTs with the first observation of single-walled CNTs from CO2 characterized by Raman spectroscopy. Lastly, these CO2-derived CNTs are integrated into Li-ion batteries at both the anode (as the active material) and the cathode (as the conductive additive with Fe-based active materials) and demonstrate a full-cell with a 68% reduction in CO2 emissions associated with Li-ion materials. Advisors/Committee Members: Douglas Adams (committee member), Greg Walker (committee member), Jason Valentine (committee member), Rizia Bardhan (committee member), Cary Pint (Committee Chair).

Subjects/Keywords: batteries; carbon; carbon dioxide; nanotubes

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APA (6^th Edition):

Douglas, A. E. (2019). Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/11370

Chicago Manual of Style (16^th Edition):

Douglas, Anna Elisabeth. “Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications.” 2019. Doctoral Dissertation, Vanderbilt University. Accessed March 01, 2021. http://hdl.handle.net/1803/11370.

MLA Handbook (7^th Edition):

Douglas, Anna Elisabeth. “Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications.” 2019. Web. 01 Mar 2021.

Vancouver:

Douglas AE. Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications. [Internet] [Doctoral dissertation]. Vanderbilt University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1803/11370.

Council of Science Editors:

Douglas AE. Sustainable Manufacturing of Carbon Nanomaterials for Energy Storage Applications. [Doctoral Dissertation]. Vanderbilt University; 2019. Available from: http://hdl.handle.net/1803/11370

Deakin University

9. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

Li Q. Hierarchical composites from carbon fibres electrosprayed with carbon nanotubes. [Internet] [Thesis]. Deakin University; 2015. [cited 2021 Mar 01]. 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

Hong Kong University of Science and Technology

10. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

Wang Z. Superconductivity in 4-Å carbon nanotube arrays. [Internet] [Thesis]. Hong Kong University of Science and Technology; 2011. [cited 2021 Mar 01]. 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

Georgia Tech

11. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

Indian Institute of Science

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

Degree: PhD, Faculty of Science, 2014, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/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 (advisor), Anil Kumar, P S (advisor).

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

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APA (6^th Edition):

Arya, V. P. (2014). Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2325

Chicago Manual of Style (16^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2014. Doctoral Dissertation, Indian Institute of Science. Accessed March 01, 2021. http://etd.iisc.ac.in/handle/2005/2325.

MLA Handbook (7^th Edition):

Arya, Ved Prakash. “Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes.” 2014. Web. 01 Mar 2021.

Vancouver:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2014. [cited 2021 Mar 01]. Available from: http://etd.iisc.ac.in/handle/2005/2325.

Council of Science Editors:

Arya VP. Charge Transport And Magnetic Properties Of Iron-embedded Multiwall Carbon Nanotubes. [Doctoral Dissertation]. Indian Institute of Science; 2014. Available from: http://etd.iisc.ac.in/handle/2005/2325

University of Johannesburg

13. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

14. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

Wilson HL. Model Development for Nanotube-Infused Polyimides. [Internet] [Doctoral dissertation]. North Carolina State University; 2009. [cited 2021 Mar 01]. 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

15. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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

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

Degree: PhD, Faculty of Science, 2011, Indian Institute of Science

URL: http://etd.iisc.ac.in/handle/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 (advisor).

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

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APA (6^th Edition):

Mahanandia, P. (2011). Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. (Doctoral Dissertation). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/1336

Chicago Manual of Style (16^th Edition):

Mahanandia, Pitamber. “Synthesis, Characterization and Electrical Transport In Carbon Nanotubes.” 2011. Doctoral Dissertation, Indian Institute of Science. Accessed March 01, 2021. http://etd.iisc.ac.in/handle/2005/1336.

MLA Handbook (7^th Edition):

Mahanandia, Pitamber. “Synthesis, Characterization and Electrical Transport In Carbon Nanotubes.” 2011. Web. 01 Mar 2021.

Vancouver:

Mahanandia P. Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. [Internet] [Doctoral dissertation]. Indian Institute of Science; 2011. [cited 2021 Mar 01]. Available from: http://etd.iisc.ac.in/handle/2005/1336.

Council of Science Editors:

Mahanandia P. Synthesis, Characterization and Electrical Transport In Carbon Nanotubes. [Doctoral Dissertation]. Indian Institute of Science; 2011. Available from: http://etd.iisc.ac.in/handle/2005/1336

University of Hong Kong

17. 李君. Capacitance measurement of single walled carbon nanotubes.

Degree: 2010, University of Hong Kong

URL: http://hdl.handle.net/10722/141923

Subjects/Keywords: Carbon.; Nanotubes.

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APA (6^th Edition):

李君. (2010). Capacitance measurement of single walled carbon nanotubes. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/141923

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

Chicago Manual of Style (16^th Edition):

李君. “Capacitance measurement of single walled carbon nanotubes.” 2010. Thesis, University of Hong Kong. Accessed March 01, 2021. http://hdl.handle.net/10722/141923.

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

MLA Handbook (7^th Edition):

李君. “Capacitance measurement of single walled carbon nanotubes.” 2010. Web. 01 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

李君. Capacitance measurement of single walled carbon nanotubes. [Internet] [Thesis]. University of Hong Kong; 2010. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10722/141923.

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

Council of Science Editors:

李君. Capacitance measurement of single walled carbon nanotubes. [Thesis]. University of Hong Kong; 2010. Available from: http://hdl.handle.net/10722/141923

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

18. 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

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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 March 01, 2021. 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. 01 Mar 2021.

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 2021 Mar 01]. 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 Manchester

19. Deng, Libo. Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres.

Degree: 2011, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:107213

► The project has been concerned with structure/property relationships in a series of different carbon nanotube (CNT) composite fibres. Raman spectroscopy has been proved to be… (more)

▼ The project has been concerned with structure/property relationships in a series of different carbon nanotube (CNT) composite fibres. Raman spectroscopy has been proved to be a powerful technique to characterise the CNT-containing fibres. Electrospinning has been used to prepare poly(vinyl alcohol) (PVA) nanofibres containing single-wall carbon nanotubes (SWNTs). The effect of the processing conditions including the polymer concentration, electric voltage, tip-to-collector distance, nanotube concentration and the collection method upon the morphology, diameter and the alignment of the fibres have been investigated.Raman spectroscopy of individual SWNTs dispersed in PVA electrospun fibres have been studied systematically in terms of the Raman band frequency, intensity and linewidth. The G'-band shift per unit strain during tensile deformation has been found to be dependent on the nanotube chirality. A detailed study has been undertaken of the efficiency of reinforcement in PVA/SWNT nanocomposites. The stress-induced Raman band shifts in the nanocomposites have been shown to be controlled by both geometric factors such as the angles between the nanotube axis, the stressing direction and the direction of laser polarisation, and by finite length effects and bundling. A theory has been developed that takes into account all of these factors and enables the behavior of the different forms of nanocomposite, both fibres and films, to be compared.The effects of dispersion and orientation of nanotubes and the interfacial adhesion on mechanical properties of poly(p-phenylene terephthalamide) (PPTA)/SWNTs composite fibres have been investigated. It has been shown the change of orientation of the polymer molecules upon incorporating nanotubes had direct effect on mechanical properties of the PPTA fibres. An in-situ Raman spectroscopy study during fibre deformation has revealed good stress transfer from the matrix to nanotubes in low strain range, and the interface failed when the strain exceeded 0.5%.Raman spectroscopy has also been employed to investigate the microstructure and micromechanical process of neat carbon nanotube (CNT) fibres. It has been found the fibres consisted of both SWNTs and MWNTs and varied in composition at different locations. High efficiency of stress transfer both within the fibre and in composites has been observed, suggesting the promising potential of CNT fibres in reinforcing polymers. Advisors/Committee Members: Young, Robert.

Subjects/Keywords: Raman spectroscopy; Carbon nanotubes

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APA (6^th Edition):

Deng, L. (2011). Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:107213

Chicago Manual of Style (16^th Edition):

Deng, Libo. “Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres.” 2011. Doctoral Dissertation, University of Manchester. Accessed March 01, 2021. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:107213.

MLA Handbook (7^th Edition):

Deng, Libo. “Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres.” 2011. Web. 01 Mar 2021.

Vancouver:

Deng L. Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres. [Internet] [Doctoral dissertation]. University of Manchester; 2011. [cited 2021 Mar 01]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:107213.

Council of Science Editors:

Deng L. Raman Spectroscopic Studies of Carbon Nanotube Composite Fibres. [Doctoral Dissertation]. University of Manchester; 2011. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:107213

Cornell University

20. Roberts, Samantha. Getting A Handle On Carbon Nanotubes.

Degree: PhD, Physics, 2014, Cornell University

URL: http://hdl.handle.net/1813/36180

► A single wall carbon nanotube is a linear polymer with exceptional mechanical properties. In particular with nanometer diameter and micron length scale a CNT has… (more)

▼ A single wall carbon nanotube is a linear polymer with exceptional mechanical properties. In particular with nanometer diameter and micron length scale a CNT has a high aspect ratio combined with unsurpassed mechanical strength. A CNT provides the ideal geometry for a truly molecular scale bio-mechanical probe. The work in this thesis was motivated by the concept of "getting a handle" on CNTs. We sought to be able to use the NT as a probe that could both exert forces and measure forces acting on it. The questions this thesis seeks to answer are twofold. (i) Can a carbon nanotube be used to probe biological systems at the molecular scale? And conversely: (ii) Can the techniques of single molecule biology be used to probe an individual carbon nanotube? In the process of answering these questions we have derived several different functional platforms for cell investigations, single molecule experiments, and exploration of CNT mechanics, as we will see. Chapters 1 through 3 introduce the unique properties of CNTs, mechanical theory, and growth methods. Chapter 4 shows motivating experiments where living cell-CNT interactions are studied. In Chapter 5 we demonstrate the ability to be able to fabricate highly aligned and parallel cantilevered CNTs-a necessary step toward realizing a probe for application. In Chapters 6-9 we will describe a platform we have developed borrowing the technique of magnetic-tweezers from the biophysics community. This technique has been used in singlemolecule studies to elucidate the properties of long biopolymers such as DNA using magnetic tags to optically resolve the molecules as well as exert forces upon them. In our work we show a similar scheme where the CNT is the molecule of interest. In our design the CNT devices are made by lithographically patterned magnetic iron pads at their ends. With this pad we can both optically resolve to position of the NT as well as exert forces on it. We will show how analysis of thermal fluctuations gives us measurement methods that are sensitive enough to elucidate the mechanical properties of the NTs. Additionally we can now exert well calibrated forces on the NT on the scale of fN-pN. We conclude by showing how this platform provides a new way to further study the physical properties of CNTs and simultaneously provides the framework to study the forces acting in CNT-biomolecule interactions. Advisors/Committee Members: McEuen, Paul L. (chair), Sethna, James Patarasp (committee member), Franck, Carl Peter (committee member).

Subjects/Keywords: Carbon Nanotubes; Magnetic Tweezers; NEMS

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APA (6^th Edition):

Roberts, S. (2014). Getting A Handle On Carbon Nanotubes. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/36180

Chicago Manual of Style (16^th Edition):

Roberts, Samantha. “Getting A Handle On Carbon Nanotubes.” 2014. Doctoral Dissertation, Cornell University. Accessed March 01, 2021. http://hdl.handle.net/1813/36180.

MLA Handbook (7^th Edition):

Roberts, Samantha. “Getting A Handle On Carbon Nanotubes.” 2014. Web. 01 Mar 2021.

Vancouver:

Roberts S. Getting A Handle On Carbon Nanotubes. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1813/36180.

Council of Science Editors:

Roberts S. Getting A Handle On Carbon Nanotubes. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/36180

Vanderbilt University

21. Jackson, Enrique Monte. Development and Thermal Properties of Carbon Nanotube-Polymer Composites.

Degree: PhD, Interdisciplinary Materials Science, 2014, Vanderbilt University

URL: http://hdl.handle.net/1803/14782

► The favorable conductive properties of carbon nanotubes (CNTs) offer opportunities for constructing CNT-based nanocomposites with improved thermal conduction for a range of potential applications. Such… (more)

▼ The favorable conductive properties of carbon nanotubes (CNTs) offer opportunities for constructing CNT-based nanocomposites with improved thermal conduction for a range of potential applications. Such lightweight composite materials are expected to have thermal properties that depend on their CNT volume fraction and operating temperature. The construction of CNT-based nanocomposites is challenged by the available processing methods for CNTs that are compatible with the construction of multi-laminated composite structures. The overall goal of this effort is to develop enhanced thermal properties in carbon nanotube-polymer composites that can replace traditional aerospace metallic materials to reduce the weight in space structures. The key innovation of this dissertation is in dispersing the carbon nanotubes onto a prepreg composite structure that sustains thermal storage and increase the thermal transport to support scientific instrumentation to more effectively radiate heat from a composite structure while increasing the thermal properties. The employed structures consisted of individual plies of IM7 prepreg composite with an embedded 8552 epoxy that were each coated with a CNT layer and then combined into the final composite structure using a vacuum-based hand layup technique for curing the 8552 epoxy. The composites were investigated by Raman spectroscopy, thermogravimetric analysis, thermal diffusivity, and differential scanning calorimetry. With varying the concentration of SWCNT up to 30 wt% to the IM7 prepreg composite, its heat capacity sustained over the tested temperature range and its through-thickness thermal diffusivity increased by 30% vs. the virgin composite material. By modeling, such additions of randomly oriented SWCNTs are suggested to increase the in-plane thermal conductivity by 120 to 150% over the temperature range of 120 to 470 K and by 30% in the through-thickness direction. A possible explanation of these improvements in the thermal conductivities are the reductions of the interfacial resistances between the SWCNTs, the 8552 epoxy, and the IM7 composite. The developed methods provide the opportunity for enhancing the thermal properties of a composite through the use of CNTs as additives. Such improvements would be particularly useful in aerospace applications for solar arrays, fairings, and thermal radiators. Advisors/Committee Members: Dr. Yaqiong Xu (committee member), Dr. Timothy Hanusa (committee member), Dr. Paul Laibinis (Committee Chair).

Subjects/Keywords: carbon nanotubes; composites; thermal conductivity

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APA (6^th Edition):

Jackson, E. M. (2014). Development and Thermal Properties of Carbon Nanotube-Polymer Composites. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14782

Chicago Manual of Style (16^th Edition):

Jackson, Enrique Monte. “Development and Thermal Properties of Carbon Nanotube-Polymer Composites.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed March 01, 2021. http://hdl.handle.net/1803/14782.

MLA Handbook (7^th Edition):

Jackson, Enrique Monte. “Development and Thermal Properties of Carbon Nanotube-Polymer Composites.” 2014. Web. 01 Mar 2021.

Vancouver:

Jackson EM. Development and Thermal Properties of Carbon Nanotube-Polymer Composites. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1803/14782.

Council of Science Editors:

Jackson EM. Development and Thermal Properties of Carbon Nanotube-Polymer Composites. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/14782

Anna University

22. 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

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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 March 01, 2021. 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. 01 Mar 2021.

Vancouver:

C S. Investigations on the tribological Behavior of multi wall carbon Nanotube reinforced epoxy Nanocomposites;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Mar 01]. 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

Rhodes University

23. Kruid, Jan. Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline.

Degree: MS, Faculty of Science, Biochemistry, Microbiology and Biotechnology, 2013, Rhodes University

URL: http://hdl.handle.net/10962/d1018238

► Oxytetracycline (OTC) is a broad spectrum antibiotic used extensively in the agricultural and human-health sector, and is effective against various gram positive and –negative bacteria… (more)

Subjects/Keywords: Voltammetry; Electrodes; Oxytetracycline; Carbon nanotubes

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APA (6^th Edition):

Kruid, J. (2013). Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline. (Masters Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1018238

Chicago Manual of Style (16^th Edition):

Kruid, Jan. “Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline.” 2013. Masters Thesis, Rhodes University. Accessed March 01, 2021. http://hdl.handle.net/10962/d1018238.

MLA Handbook (7^th Edition):

Kruid, Jan. “Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline.” 2013. Web. 01 Mar 2021.

Vancouver:

Kruid J. Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline. [Internet] [Masters thesis]. Rhodes University; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10962/d1018238.

Council of Science Editors:

Kruid J. Voltammetric investigation of microbiological growth media and carbon nanotube modified electrodes : a case study of oxytetracycline. [Masters Thesis]. Rhodes University; 2013. Available from: http://hdl.handle.net/10962/d1018238

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: PhD, Chemical Engineering, 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

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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. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161426

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. Doctoral Dissertation, Texas A&M University. Accessed March 01, 2021. http://hdl.handle.net/1969.1/161426.

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. 01 Mar 2021.

Vancouver:

Gomez Ballesteros JL. Evolution of Nanocatalyst Structure and Composition during Chemical Vapor Deposition Synthesis of Single-Walled Carbon Nanotubes. [Internet] [Doctoral dissertation]. Texas A&M University; 2017. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1969.1/161426.

Council of Science Editors:

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

Texas A&M University

25. Li, Shifan. Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes.

Degree: MS, Civil Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/174359

► This study investigates the adsorption of several ionizable compounds on different types of carbon nanotubes, including graphitized multi-walled carbon nanotubes (G-CNTs), carboxyl functionalized multi-walled carbon… (more)

▼ This study investigates the adsorption of several ionizable compounds on different types of carbon nanotubes, including graphitized multi-walled carbon nanotubes (G-CNTs), carboxyl functionalized multi-walled carbon nanotubes (COOH-CNTs) and hydroxyl functionalized multi-walled carbon nanotubes (OH-CNTs). The ionizable compounds investigated in this study are benzoic acid (BA), 2-naphthoic acid (2-NA), 3-hydroxy-2-naphthoic acid (3-H-2-NA), 3-methoxy-2-naphthoic acid (3-M-2-NA) and 3-amino-2-naphthoic acid (3-A-2-NA). Adsorption isotherms of BA on all three CNTs at pH 2 and pH 7 were measured and they are highly nonlinear. The maximum capacity of functionalized CNTs for BA was invariably higher than that of G-CNTs. The results agree with a previous report that benzoate displayed strong adsorption onto functionalized CNTs and is consistent with the assumption that the negative-charged H-bonds are formed during the adsorption. OH- stoichiometry confirmed that the adsorption of benzoate was accompanied with OH- release. In comparison, the adsorption of BA on G-CNTs at pH 2.0 is mostly attributed to the hydrophobic force. At pH 2, functionalized CNTs show a greater adsorption for BA than G-CNTs. The forming of hydrogen bonding between O-containing functional groups on CNTs and the oxygen on the carboxyl functional group on benzene rings was deemed as the main reason for the enhanced adsorption of functionalized CNTs. The sorption isotherms of NA at pH 2.0 and 7.0 displayed a similar adsorption patterns as BA. Hydrophobic forces play significant roles in the adsorption of the acids at pH 2.0. At pH 7.0, the adsorption of the base exhibited strong affinity to functionalized CNTs, suggesting that similar charge-assisted hydrogen bonding has been formed during adsorption. A comparison of hydroxide ion release from BA and NA adsorption on COOH-CNTs at pH 7.0 showed that the hydroxide release from NA almost overlaps with the hydroxide release for BA adsorption, suggesting that the molecular size doesn’t impact the forming of negative-charged H-bond. But the molecular structure did show a significant impact on the formation of this particularly strong intermolecular force. Advisors/Committee Members: Ma, Xingmao (advisor), Chu, Kung-Hui (committee member), King, Maria (committee member).

Subjects/Keywords: Adsorption; Carbon Nanotubes; Ionizable Compounds

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APA (6^th Edition):

Li, S. (2018). Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174359

Chicago Manual of Style (16^th Edition):

Li, Shifan. “Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes.” 2018. Masters Thesis, Texas A&M University. Accessed March 01, 2021. http://hdl.handle.net/1969.1/174359.

MLA Handbook (7^th Edition):

Li, Shifan. “Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes.” 2018. Web. 01 Mar 2021.

Vancouver:

Li S. Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1969.1/174359.

Council of Science Editors:

Li S. Investigation on the Adsorption Mechanisms of Ionizable Compounds on Carbon Nanotubes. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174359

Texas A&M University

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

Degree: PhD, Materials Science and Engineering, 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 (σ), 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 (S2σ) within an order of magnitude of commonly used semiconductors (~400 μW 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 μW 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

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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. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/151038

Chicago Manual of Style (16^th Edition):

Moriarty, Gregory P. “Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites.” 2013. Doctoral Dissertation, Texas A&M University. Accessed March 01, 2021. http://hdl.handle.net/1969.1/151038.

MLA Handbook (7^th Edition):

Moriarty, Gregory P. “Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites.” 2013. Web. 01 Mar 2021.

Vancouver:

Moriarty GP. Tailoring the Thermoelectric Behavior of Electrically Conductive Polymer Composites. [Internet] [Doctoral dissertation]. Texas A&M University; 2013. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/1969.1/151038.

Council of Science Editors:

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

McMaster University

27. Muhetaer, Yimiti. SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs.

Degree: PhD, 2016, McMaster University

URL: http://hdl.handle.net/11375/20443

► Single-walled carbon nanotubes (SWNTs) are envisioned as one of the most promising materials for next-generation electronic devices such as field-effect transistors, photovoltaics, new power sources… (more)

▼ Single-walled carbon nanotubes (SWNTs) are envisioned as one of the most promising materials for next-generation electronic devices such as field-effect transistors, photovoltaics, new power sources and bio/chemical sensors. In particular, solution processable SWNT networks are of great interest for flexible and stretchable electronics. However, most of these applications specifically require pure semiconducting (sc-) or metallic (m-) SWNTs. However, large scale synthetic methods for SWNTs always produce a mixture of semiconducting and metallic carbon nanotubes. In recent years, several biochemical separation techniques such as DNA assisted separation, density gradient ultracentrifugation, and gel chromatography techniques have been utilized to separate semiconducting and metallic SWNTs. Although these methods can be used for sorting SWNTs according to their chiralities, they are either time-consuming or not easily scalable. In addition, the supramolecular functionalization of SWNTs with conjugated polymers has received a great deal of attention due to its capability to extract sc-SWNTs via simple sonication and centrifugation steps within a few hours. Furthermore, π-conjugated polymers can be modified by suitably changing monomers and/or comonomers, and it is also easy to control molecular weight and solubility of resulting polymers in organic solvents and aqueous media. There is also the possibility for selectively extracting specific chirality (n, m) nanotubes using specifically designed macromolecular structures. Except for its application to the separation of SWNTs, the supramolecular complexes of π-conjugated polymer and SWNTs have potential applications in many research areas such as new composite materials. After a brief overview of the current work related to the investigation of the supramolecular interaction between various conjugated polymers and SWNTs (chapter 1), synthesis of a series of different types of fluorene-based conjugated copolymers and their supramolecular complex formation properties with SWNTs are described (chapter 2, 3, 4, 5 and 6). In order to understand the effect of conjugated polymer backbone and side-chain structure on formation of supramolecular complexes with SWNTs, several crucial factors were investigated by: (1) altering the polymer backbone composition; (2) introducing different solubilizing (functional) groups while the polymer backbone remains the same; (3) changing the side-chain functional groups, and (4) introducing different polymer repeat units with varying physical and chemical properties. The experimental results indicated that all of the resulting polymer-SWNTs complexes possess excellent (or moderate) solution stability in organic solvents such as tetrahydrofuran (THF), toluene, and xylene. It was also demonstrated that the interaction between the conjugated polymers and SWNTs is strongly influenced by polymer structure; even minor changes on side-chains have a significant effect on the selectivity of the polymers in dispersing specific SWNT structures. This… Advisors/Committee Members: Adronov, Alex, Chemistry and Chemical Biology.

Subjects/Keywords: conjugated polymer; carbon nanotubes; fluorene

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

APA (6^th Edition):

Muhetaer, Y. (2016). SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/20443

Chicago Manual of Style (16^th Edition):

Muhetaer, Yimiti. “SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs.” 2016. Doctoral Dissertation, McMaster University. Accessed March 01, 2021. http://hdl.handle.net/11375/20443.

MLA Handbook (7^th Edition):

Muhetaer, Yimiti. “SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs.” 2016. Web. 01 Mar 2021.

Vancouver:

Muhetaer Y. SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs. [Internet] [Doctoral dissertation]. McMaster University; 2016. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11375/20443.

Council of Science Editors:

Muhetaer Y. SYNTHESIS OF FLUORENE-BASED π-CONJUGATED POLYMERS AND THE STUDY OF THEIR INTERACTION WITH SWNTs. [Doctoral Dissertation]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/20443

McMaster University

28. Shamshoom, Christina. Pillar[5]arene Decorated Single-Walled Carbon Nanotubes.

Degree: MSc, 2019, McMaster University

URL: http://hdl.handle.net/11375/24087

►

Control of single-walled carbon nanotube dispersion properties is of substantial interest to the scientific community. In this work, we sought to investigate the effect of… (more)

Subjects/Keywords: Carbon nanotubes; Pillar[5]arene

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

APA (6^th Edition):

Shamshoom, C. (2019). Pillar[5]arene Decorated Single-Walled Carbon Nanotubes. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/24087

Chicago Manual of Style (16^th Edition):

Shamshoom, Christina. “Pillar[5]arene Decorated Single-Walled Carbon Nanotubes.” 2019. Masters Thesis, McMaster University. Accessed March 01, 2021. http://hdl.handle.net/11375/24087.

MLA Handbook (7^th Edition):

Shamshoom, Christina. “Pillar[5]arene Decorated Single-Walled Carbon Nanotubes.” 2019. Web. 01 Mar 2021.

Vancouver:

Shamshoom C. Pillar[5]arene Decorated Single-Walled Carbon Nanotubes. [Internet] [Masters thesis]. McMaster University; 2019. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/11375/24087.

Council of Science Editors:

Shamshoom C. Pillar[5]arene Decorated Single-Walled Carbon Nanotubes. [Masters Thesis]. McMaster University; 2019. Available from: http://hdl.handle.net/11375/24087

University of Waterloo

29. Wang, Sunmeng. Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes.

Degree: 2020, University of Waterloo

URL: http://hdl.handle.net/10012/15977

► Carbon nanotubes have broken through the barriers of our imagination and are currently being investigated for various nano-electronic device applications. Successful implementation in these applications… (more)

▼ Carbon nanotubes have broken through the barriers of our imagination and are currently being investigated for various nano-electronic device applications. Successful implementation in these applications however, often requires strict control of their properties and orientation. As such, post-synthesis processing must be performed prior to any device fabrication. These processing techniques often aim to either address the challenges associated with sorting and alignment individually. A novel method called the alignment relay technique aims to address both of these issues simultaneously. As the introduction of this process was merely a proof of concept, focus must be put in place to enhance the performance and e cacy. In an attempt to improve this technique, we alter the temperature, liquid crystal, iptycene design as well as means of alignment as attempts to accomplish this. At the same time, mechanistic details are revealed to gain a better insight of the nanoscopic dynamics. Preparation of preliminary materials and apparatuses are initially performed. We rst build a Polarized Optical Microsope (POM) in order to observe the liquid crystal dynamics. Despite its frequent use in a research setting, the cost can be upwards of thousands of dollars. As only qualitative observations are required, we decided to build our own model. In this section, we provide a blueprint for the construction of an economical POM with a heating stage and digital connection for facile recording of data, totaling about 150-200. We subsequently demonstrate its e ective application in visualizing liquid crystals. After the microscope is made, various molecules are synthesized to gain the chemical resources needed for the alignment. In an attempt to circumvent some of the hazards asssociated with the original synthesis, an alternate route to create iptycene (5) is rst explored. Despite having success in the initial parts of the synthetic sequence, an inability to replicate literature conditions causes the nal step to produce only a 2% yield. Thus, we are forced to abandon this procedure and revert to using the original route to making the molecule. A smaller iptycene molecule (9) is subsequently made through attaching the anchoring group directly to one of the intermediates appearing in the synthesis of iptycene (5). Finally, a separate liquid crystal (11) is synthesized through two nucleophilic additions with 4- hydroxy-4-biphenylcarboxylic acid. These materials provide us the necessary grounding to perform experiments with the alignment relay technique. After the preliminary materials are gathered, the e ects of changing the temperature, liquid crystal and iptycene on CNT depositions are observed. An increase in temperature from 25 °C to 70 °C with a nematic liquid crystal (ZLI-1185) do not yield great results as standard deviations are over 45 o. Attempts at using a more ordered smectic A liquid crystal mixture do not aid results either. In fact, we obtain no CNT deposition at all with these iv attempts.…

Subjects/Keywords: carbon nanotubes; Alignment Relay Technique

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

APA (6^th Edition):

Wang, S. (2020). Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/15977

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, Sunmeng. “Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes.” 2020. Thesis, University of Waterloo. Accessed March 01, 2021. http://hdl.handle.net/10012/15977.

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, Sunmeng. “Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes.” 2020. Web. 01 Mar 2021.

Vancouver:

Wang S. Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes. [Internet] [Thesis]. University of Waterloo; 2020. [cited 2021 Mar 01]. Available from: http://hdl.handle.net/10012/15977.

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

Council of Science Editors:

Wang S. Enhancing the Simultaneous Alignment and Sorting of Carbon Nanotubes. [Thesis]. University of Waterloo; 2020. Available from: http://hdl.handle.net/10012/15977

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

Penn State University

30. Narayanan, Rajaram. Carbon nanotube flow sensors: A comprehensive study .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/11914

► It has been established that flow of fluids over Carbon Nanotubes (CNTs) generate voltages. The “Sood effect” as it is colloquially referred to, can spawn… (more)

Subjects/Keywords: flow sensors; Carbon Nanotubes; biosensors

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

APA (6^th Edition):

Narayanan, R. (2011). Carbon nanotube flow sensors: A comprehensive study . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11914

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):

Narayanan, Rajaram. “Carbon nanotube flow sensors: A comprehensive study .” 2011. Thesis, Penn State University. Accessed March 01, 2021. https://submit-etda.libraries.psu.edu/catalog/11914.

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

MLA Handbook (7^th Edition):

Narayanan, Rajaram. “Carbon nanotube flow sensors: A comprehensive study .” 2011. Web. 01 Mar 2021.

Vancouver:

Narayanan R. Carbon nanotube flow sensors: A comprehensive study . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Mar 01]. Available from: https://submit-etda.libraries.psu.edu/catalog/11914.

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

Council of Science Editors:

Narayanan R. Carbon nanotube flow sensors: A comprehensive study . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/11914

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

Open Access Theses and Dissertations