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 616 for “"nanotube"”.
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Carbon Nanotube Devices
Eine Reihe wichtiger Wachstums- und Integrationsaspekte von Kohlenstoff-Nanoröhren wurde im Rahmen dieser Arbeit untersucht. Der Schwerpunkt der experimentellen Arbeit lag dabei hauptsächlich bei einschaligen Kohlenstoffnanoröhren (SWCNT). Das große Potential dieser Nanoröhren für …
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Carbon Nanotube Alignment within Macrostructures
The enhancement of alignment in carbon nanotube (CNT) assemblies is an important challenge in scaling up their exceptional properties from the nano- to the macroscopic level. In this work, theoretical and computational studies were performed to understand how CNT alignment is measured, how it …
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Carbon nanotube based electromechanical probes
… mechanical and electrical properties, carbon nanotubes (CNTs) are strong candidates for future probing applications. A new class of metal-CNT hybrid electromechanical probes is presented where vertically aligned carbon nanotube structures, grown with a chemical vapor deposition (CVD) …
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Carbon nanotube-based chemical sensing
In this thesis, we introduce approaches to carbon nanotube-based sensing for applications in environmental monitoring, disease diagnostics, and food analysis: In Chapter 1, we introduce carbon nanotube-based sensing. We describe parameters that give rise to the sensing capabilities of CNT-based …
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Increasing carbon nanotube forest density
… morphological properties of individual carbon nanotubes (CNTs) open up exciting potential applications in a wide range of fields. One such application is replacing the standard activated carbon electrode in electrochemical double layer (EDLC) ultracapacitors with vertically aligned CNT forests …
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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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New approaches to scaled-up carbon nanotube synthesis and nanotube-based metal composites and sensors
… cost-effective synthesis of single walled carbon nanotubes (SWNTs) by thermally-induced catalytic chemical vapor deposition (CVD). With the goal of understanding the growth mechanism and optimize the synthesis process, the effect of CVD and catalyst parameters on nanotube formation was …
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Engineering carbon nanostructures : development of novel aerogel-nanotube composites and optimization techniques for nanotube growth
… for evaluating a metal's ability to catalyze nanotube growth, including in situ carbothermic reduction of oxidized nanoparticles to their catalytic metallic phase as they form and production of a bulk quantity of nanoparticles which can be easily characterized. In this work, metal-doped carbon …
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Nanotube reinforced thermoplastic polymer matrix composites
… conductivity, and electrical conductivity make nanotubes attractive reinforcements for polymer matrix composites. However, the structure that makes them desirable also causes highly anisotropic properties and limited reactivity with other materials. This thesis isolates these problems in two …
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Single Ion Detection in Nanotube Nanofluidics
… (OCC)-functionalized (6,5) single-walled carbon nanotubes (SWCNTs) to detect proton diffusion in nanofluidic systems at the single-ion level. I first developed a method to encapsulate SWCNTs between two layers of Parylene-C, a polymer with exceptionally low permeability to water and oxygen. The …
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Carbon nanotube films for flexible electronics
… semiconductors. Recently, films of carbon nanotubes have been proposed as electronic materials with superior electrical performance due to exceptional electrical and mechanical properties of single-walled carbon nanotubes (SWCNTs). In this thesis, some aspects of recent research efforts on …
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Thermoelectric properties of carbon nanotube films
… of the thermoelectric properties of carbon nanotube (CNT) films and the fabrication process of carbon nanotube-based thermoelectric devices. The Seebeck coefficient is a intrinsic property of a thermoelectric material that correlates the voltage produced by a conductor and the temperature …
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Carbon nanotube interconnects for IC chips
Carbon nanotubes (CNTs) have been investigated as candidate materials to replace or augment the existing copper-based technologies as interconnects for Integrated Circuit (IC) chips. Being ballistic conductors, CNTs are capable of carrying higher current densities of up to 10¹⁰A/cm² and high …
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Carbon nanotube-based field ionization vacuum
… that uses arrays of isolated vertical carbon nanotubes (CNT) to field ionize gas particles. The ionized gas molecules are accelerated to and implanted into a negatively biased getter removing the gas molecules from the volume being pumped. CNTs are ideal for field ionization because of their …
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Towards a carbon nanotube antibody sensor
This work investigated single-walled carbon nanotube (SWNT)/polymer-protein A complexes for optically reporting antibody concentration via a change in near infrared fluorescent emission after antibody binding. SWNT have potential as biosensors because of extraordinary sensitivity, lack of …
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Stiffness matrices of carbon nanotube structures
… of graphene, the planar building block of carbon nanotubes. Through continuum linear elastic analysis and a displacement-based finite element method, the global in-plane stiffness matrix for an arbitrary carbon atom of the lattice was found. The matrix provides the atomic level forces induced on …
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Carbon nanotube electrodes for capacitive deionization
… ordered-geometry, vertically-aligned carbon nanotube electrodes. The CNTs in this study have 2-3 walls, inner diameter of 5.6 nm and outer diameter of 7.7 nm. The capacitance and charging dynamics were investigated using three-electrode cell testing in sodium chloride solution. We found that …
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Characterization of Aligned Carbon Nanotube/Polymer Composites
The main objective of 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 …
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