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 19 of 19 for “"nanotube arrays"”.
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Stimuli-responsive polymer nanotube arrays
Nanotube arrays, composed of materials such as carbon, titania, and zinc oxide, have shown potential as conductors, energy conversion devices, actuators, and adhesives. Such nanoscale constructs are particularly novel for their high area-to-volume and length-to-diameter aspect ratios that lead to …
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Development of ZnO Nanotube Arrays for Chemical Sensing
… the development of a new material, anodic ZnO nanotube array, as the sensing platform and the application of artificial intelligence to a sensor system developed using this material. The nanotube array geometry showed specific light scattering properties, as revealed by the finite difference …
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Electrical and optical studies on carbon nanotube arrays
Single-walled carbon nanotubes (SWNTs) have been studied as a prominent class of high performance electronic materials for next generation electronics. Their geometry dependent electronic structure, ballistic transport and low power dissipation due to quasi one dimensional transport, and their …
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Single-Walled Carbon Nanotube Arrays for High Frequency Applications
… analysis of semiconducting Single-Walled Carbon Nanotube-based devices, followed by a test structure fabrication and measurements.</p> <p>The analysis starts by developing an individual nanotube model, which is then generalized for many nanotubes and adding the parasitic elements. The parasitic …
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Three-dimensional nanotube arrays for solar energy harvesting and production of solar fuels
… aligned, highly uniform nanorods and nanowire arrays for solar energy conversion have been explored as potential candidates for solar energy conversion and solar-fuel generation owing to their enhanced photoconversion efficiencies.</p><p>However, controlled fabrication of nanorod and especially …
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Synthesis of Single Wall Carbon Nanotube Arrays and Their Application in Single Molecular electronics
… yield, low cost fabrication technique. Carbon nanotubes are new materials with great electronic conductivity and small diameter, etc. They are great candidate for the electrode of single molecular electronic devices. A great effort of this thesis has been devoted into the chemical vapor …
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Capillary densification and adhesion tuning of aligned carbon nanotube arrays for shape-engineerable architectures
… of aligned nanofibers (NFs), such as carbon nanotubes (CNTs), and their ability to be self-assembled by capillary forces motivates their use as shape-engineerable materials. In order to achieve facile and accurate patterning and densification of NFs into new architectures, a mechanistic …
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Miniaturized electron-impact-ionization pumps using double-gated isolated vertically aligned carbon nanotube arrays
… double-gated isolated vertically aligned carbon nanotubes (VA-CNTs), an electronimpact- ionization region, and a non-evaporative ion-implantation getter. Single-gated VA-CNT FEAs were tested as field emitters in high vacuum (10-9 Torr). The current density of the tested device is ~0.5A/cm2 (total …
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Novel Nanostructured Titania and Titania Nanocomposites for Photovoltaics and Photocatalysis
… novel synthesis and surface modification of TiO2 nanotube arrays for applications in advanced dye-sensitized solar cells (DSSCs) and efficient photocatalysis. The first part of this work entails fast synthesis of bamboo-type TiO2 nanotube arrays with large surface area via anodization of Ti …
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GEOMETRY AND MORPHOLOGY OF TiO2 AND Fe2O3 NANOTUBES FOR SOLAR PHOTOLYSIS OF WATER
… and vertically oriented double walled TiO2 nanotubes and thin walled α- Fe2O3 nanotubes were synthesized for visible light driven photocatalytic water splitting. Sonoelectrochemical anodization technique in combination with a room temperature ionic liquid was utilized to synthesize …
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Synthesis and properties of nanoparticulate titanium dioxide compounds
… and constructed for the preparation of TiO2 nanotubes. Conditions of anodic oxidation were established to reproducibly prepare TiO2 nanotubes of average length 35-50 μm vertically orientated relative to the plain of a pure titanium metal sheet. A non-aqueous solution of ethylene glycol …
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Membrane fragmentation by a 20-29 fragment of human islet amyloid polypeptide and rat amyloid polypeptide
… rIAPP20-29, using solid-state NMR experiments on nanotube arrays of anodic aluminum oxide containing aligned phospholipid membranes.</p> <p>31P NMR results suggest that membrane fragmentation by hIAPP is related to peptide aggregation as the presence of Congo red, an inhibitor of amyloid …
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Improving blood compatibility of surfaces using tanfloc and carboxymethyl-kappa-carrageenan polyelectrolyte multilayers
… (CMKC) PEMs on titanium nanotube arrays (TiNT). Results demonstrated superior performance of CMKC compared to heparin (HEP) in reducing platelet adhesion, activation, and whole-blood clotting. Structural similarity of CMKC to HEP, coupled with its sustainable and …
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Nanopore/Nanotube Pattern Formation through Focused Ion Beam Guided Anodization
… anodic oxide layers exhibit interesting nanopore/nanotube structures. In this work, focused ion beam patterning method is introduced to general anodization, aiming to make highly ordered anodic porous alumina and titania nanotubes. Focused ion beam guided porous anodic alumina is carried out by …
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Graphene Decorated Substrates and Their Interfacial Characteristics
<p>Carbon nanotubes and graphene have been extensively studied for their excellent properties. As research on carbon expands, two major issues face the scientific community: (i) Expanding the scale of synthesis and (ii) Integration of different carbon structures for improved functionality. While …
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Mechanical energy storage in carbon nanotube springs
… storage in mechanical springs made of carbon nanotubes is a promising new technology. Springs made of dense, ordered arrays of carbon nanotubes have the potential to surpass both the energy density of electrochemical batteries and the power density of capacitors due to the effective Young's …
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Characterization of nanoscale electronic materials using novel methods for scan probe microscopy
… Microscopy to qualitatively characterize carbon nanotube (CNT) electrical properties. Using novel methods to maximize the signal and sensitivity of the microwave reflectivity response to the carbon nanotubes, we were able to spatially map and distinctly identify the electronic character of …
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Multifunctional Composites Using Carbon Nanotube Fiber Materials
… (NRLC) consisting of Multiwalled Carbon Nanotube (MWCNT) arrays that are interspersed between the plies of a fiber reinforced polymeric composite was developed. The MWCNT array and the polymer matrix are arranged within the laminated composite so that the new interfaces yield higher …