Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 96 for “"SWNTs"”.
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EXPLORING THE REACTIVITY AND INTERACTIONS OF A POLY(FLUORENE-CO-TETRAZINE)-CONJUGATED POLYMER WITH SWNTS
… to disperse single-walled carbon nanotubes (SWNTs) in organic solvent. It was found that polymer molecular weight, side chain structure, and degree of conjugation all impacted the quality of SWNT dispersions. While the starting poly(fluorene-co-tetrazine) polymer produced concentrated …
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Determination of Carbon Nanotube Modification by TG-MS and Pyrolysis-GC/MS
… specifically single-walled carbon nanotubes (SWNTs). However, investigators at NASA Langley and the National Institute of Aerospace Research have recently obtained (SWNTs) that are soluble in select solvents, including THF, DM Ac, and ODCB. The SWNTs were exposed to reagents used in cited …
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DNA-Templated Surface Alignment and Characterization of Carbon Nanotubes.
… to align single-walled carbon nanotubes (SWNTs) on surfaces from a droplet of nanotube suspension under gas flow. Fluid motion studies indicate that alignment is likely due to circulation of SWNTs in the droplet. My work provides a facile method for generating oriented nanotubes for …
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Integration of aligned arrays of single-walled carbon nanotubes in electronic devices
Aligned arrays of single-walled carbon nanotubes (SWNTs) are an attractive format for macroelectronics and RF analog electronics with exceptional electrical, mechanical and optical properties. Unlike isolated SWNT, the presence of many SWNTs in the aligned arrays increases the current output and …
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Advanced purification of aligned arrays of single-walled carbon nanotubes
… materials, single walled carbon nanotubes (SWNTs) are extremely attractive due to their outstanding charge transport properties and ultrathin bodies. One of the most daunting challenge, however, is in creating large-area, perfectly aligned arrays of purely semiconducting SWNTs (s-SWNTs). …
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The road to high performance single walled carbon nanotube thin film transistors: purification, densification, and integration
Single walled carbon nanotubes (SWNTs) have garnered substantial interest in the electronic materials research community due to their unparalleled intrinsic electrical properties. In particular, aligned arrays of SWNTs grown via chemical vapor deposition (CVD) on quartz enable device uniformity and …
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Alignment and characterization of carbon nanotubes of photolithographically patterned electrodes
… suspended single wall carbon nanotubes (SWNTs) based on the measurements of their Raman Radial Breathing Modes and electron transition energies E[sub]ii based on Raman spectroscopy. The suspended SWNTs are grown on a photolithographically defined electrode pattern, which is designed so …
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Scanning Tunneling Microscopy and Spectroscopy of Carbon Nanotubes Interfaced With Silicon Surfaces
Single-walled carbon nanotubes (SWNTs) are high-aspect-ratio molecular wires that exhibit either metallic or semiconducting behavior depending upon their diameter and chiral angle. SWNTs support high-mobility electrical conduction, are chemically and mechanically robust, and can both emit and …
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Characterization of Aligned Carbon Nanotube/Polymer Composites
… this thesis is to efficiently disperse and align SWNTs in two different polymer matrices to obtain an orthotropic composite whose strength, stiffness and electrical properties depend on the orientation of the SWNTs. The SWNTs are successfully dispersed and aligned in a polyimide matrix and a …
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Functionalized single-walled carbon nanotubes for composite applications and radiation studies
… multifunctional. Single-walled carbon nanotubes (SWNTs) have various properties that fit these criteria as a novel material for space and biomedical applications. To utilize SWNTs for this purpose, new chemical functionalization schemes need to be developed and studied. Fluorinated single-walled …
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Synthesis and Properties of Chemically Modified Carbon Nanotubes
… their discovery single-walled carbon nanotubes (SWNTs) have gained the interest of many scientists and engineers due to their prominent structural, mechanical and electronic properties which make them applicable in various areas including electronics, chemical and biological sensing and …
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Thin-film single-walled carbon nanotube transistors fabricated using mechanical meniscus aligned arrays
Single-walled carbon nanotubes (SWNTs) are novel carbon nanostructures with unique properties that have made them highly attractive materials for research in nanotechnology. Due to their exceptional electrical, mechanical, optical and structural properties, SWNTs have potential applications in the …
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Biomedical studies of single -walled carbon nanotubes using near-infrared fluorescence
… for the use of single-walled carbon nanotubes (SWNTs) in biomedical applications. SWNTs have been found to be a unique class of nanoscale near-infrared (NIR) fluorescence contrast agents that also exhibit novel therapeutic capabilities. In our first study, we found that cultured macrophage cells …
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Functionalization, growth and applications of single wall carbon nanotubes
… and especially single wall carbon nanotubes (SWNTs), represent one of the most widely investigated materials today in the emerging field of nanotechnology. The development of oriented growth of SWNTs critical for applications, novel approaches for the creation of functional SWNTs, and …
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Aggregation Behavior of Chiral Single-Walled Carbon Nanotubes and their Transport in Landfill Conditions
… of chiral single-walled carbon nanotubes (SWNTs) and their transport in landfill conditions. This study involves four key tasks: functionalization of chirally separated SWNTs, aggregation kinetics of covalently and non-covalently functionalized SWNTs, aggregate structure determination, and …
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Functionalized Single Walled Carbon Nanotube/Polymer Nanocomposite Membranes for Gas Separation and Desalination
… membranes were fabricated by orienting the SWNTs by high vacuum filtration. The orientation of SWNTs on top of the porous support was sealed by UV polymerization. For making these membranes, the CNTs were purified and cut into small open tubes simultaneously functionalizing them with COOH …
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Applications of Single-Walled Carbon Nanotubes in Organic Electronics
… in 2004. Single-walled carbon nanotubes (SWNTs) have the potential to bring next-generation electronic devices to fruition. Such devices could be flexible, conformable, and inexpensive. SWNT-based electronics are promising for chemical and biological sensing applications, for example, …
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Raman spectroscopy of single wall carbon nanotubes
… signals from many different types of individual SWNTs, to develop methods and tools to collect, organize and analyze large amounts of Raman spectra from them, to use resonant Raman spectroscopy to characterize individual SWNTs, and to investigate how their electronic and vibrational properties …
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Evaluations of single walled carbon nanotubes using resonance Raman spectroscopy
… properties of single walled carbon nanotubes (SWNTs). In the first study, we report an evaluation of second-order combination and over-tone modes in highly ordered pyrolytic graphite (HOPG), in SWNT bundles, and in isolated SWNTs. We found both dispersive and non-dispersive Raman bands in the …
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Characterization, Functionalization, and Adsorption Behavior of Single-Walled Carbon Nanotubes towards Bisphenol A and 17 Β- Estradiol
… applications of single-walled carbon nanotubes (SWNTs) through the adsorption of representative endocrine disrupting compounds: bisphenol A (BPA) and 17 β-estradiol (E2). Initially, a protocol was developed to understand the effect of ultrasonication on the dispersion of SWNTs in water. The …
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