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 42 for “"single-walled carbon nanotubes (SWNTs)"”.
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Characterization, Functionalization, and Adsorption Behavior of Single-Walled Carbon Nanotubes towards Bisphenol A and 17 Β- Estradiol
… evaluated the environmental 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 …
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Optimization of purely semiconducting carbon nanotube complementary field effect transistors
… nanomaterials that have been discovered, single walled carbon nanotubes (SWNTs) have properties that make them uniquely well suited for high-performance carbon nanotube field-effect transistors (CNTFETs). The most advanced opportunities, however, demand optimized properties of …
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Biomedical studies of single -walled carbon nanotubes using near-infrared fluorescence
… providing a scientific foundation 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 …
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Investigation of dye-sensitized solar cell performance with single chirality semiconducting carbon nanotubes
… solar cells (DSSCs) assembled with single-walled carbon nanotubes (SWNTs) of a single chirality in the photoanode were investigated. Single-chirality carbon nanotubes (CNTs) allow a selection of band-gap and electron mobility. Separating a specific chirality from a mixture of carbon …
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Determination of Carbon Nanotube Modification by TG-MS and Pyrolysis-GC/MS
Uniform dispersion of carbon nanotubes (CNTs) has been one of the major impediments to the full development of the incredible suite of properties offered by CNTs, specifically single-walled carbon nanotubes (SWNTs). However, investigators at NASA Langley and the National Institute of Aerospace …
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M13 virus/single-walled carbon nanotubes as a materials platform for energy devices and biomedical applications
… work, new approaches to effectively incorporate single-walled carbon nanotubes (SWNTs) into energy devices are presented. Genetically engineered M13 virus clones are developed to assemble SWNTs and technically important inorganic materials biomineralized on the protein surfaces of M13 virus to …
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Nanomaterials from Nanocomponents: Synthesis and Properties of Hybrid Nanomaterials
… composed of cadmium selenide nanoparticles and single-walled carbon nanotubes (SWNTs) are discussed; a novel synthetic method for these hybrids is presented, and an anomalous photoluminescence behavior is examined. Our experiments show that SWNTs can be decorated with CdSe nanoparticles at high …
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Integration of Single -Walled Carbon Nanotubes With Gallium Arsenide(110) and Indium Arsenide(110) Surfaces: A Scanning Tunneling Microscopy Study
… of semiconducting surfaces on supported carbon nanotubes, we have used scanning tunneling microscopy (STM) and spectroscopy (STS) to investigate the physical and electronic behavior of single-walled carbon nanotubes (SWNTs) coupled to GaAs(110) and InAs(110) substrates in ultrahigh vacuum …
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Development of enzymatic biofuel cell based on carbon nanotube electrodes on porous silicon
… or current collecting platform on which carbon nanotubes (CNTs), both single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MiWNTs), were synthesized directly, followed by enzyme catalyst immobilization on the CNTs. Laccase and glucose oxidase (GOx) were used as …
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Design, Synthesis, and Photophysical Investigation of Porphyrin-containing Polymer-wrapped Single-walled Carbon Nanotubes
… the fundamental photophysical behavior of single-walled carbon nanotubes (SWNTs) have been made possible by the development of ionic, conjugated aryleneethynylene polymers that helically wrap SWNTs with well-defined morphology. My contribution to this work was the design and synthesis of …
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Development of environmentally benign microencapsulation with polymer microspheres and liposomes
… fire retardant, inorganic nanoparticles, and carbon nanotubes, was developed. In the process, host particles, monomers and other components are first mixed together followed by polymerization and encapsulation. Thin-film coating was achieved for particle size above 1 um For nanoparticles, …
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Synthesis and Properties of Chemically Modified Carbon Nanotubes
Since 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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Advanced purification of aligned arrays of single-walled carbon nanotubes
… the large variety of semiconducting 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 …
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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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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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Approaches for alignment and purification of single walled carbon nanotube thin films and their application in device electronics
… horizontally aligned arrays of semiconducting single walled carbon nanotubes (SWNTs) represent one of the most promising materials for low cost, high performance electronic today. Over the years, a great deal of progress has been made towards this goal, however, to date, there are still key …
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Evaluations of single walled carbon nanotubes using resonance Raman spectroscopy
… to evaluate the vibrational 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 …
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Single-Walled Carbon Nanotube Response to Neutron and Gamma Irradiation
The unique electronic properties of single-walled carbon nanotubes (SWNTs) have sparked interest for using such nanomaterials in the nuclear industry and within radiation detection devices. To explore the application of SWNTs in the nuclear industry, it was first deemed necessary to study how SWNTs …
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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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Scanning tunneling microscopy and spectroscopy of nanometer scale metallic features on silicon surfaces
… nanometer scale metal contacts on semiconducting single-walled carbon nanotubes (SWNTs) can determine the transport performance of SWNT based field effect transistors (FETs). In this thesis, I have used an ultrahigh vacuum (UHV) scanning tunneling microscope (STM) to fabricate nanometer scale …
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