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 797 for “"carbon nanotubes"”.
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Photophysics of carbon nanotubes
… advances made in optical studies of single-wall carbon nanotubes. Studying the electronic and vibrational properties of carbon nanotubes, we find that carbon nanotubes less than 1 nm in diameter exhibit dramatic changes in their electron and phonon dispersion relations due to the curvature of the …
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Characterization of fluorinated carbon nanotubes
… fluorination conditions in order to produce C2F carbon nanotubes. Possible fluorotube structures are optimized with molecular mechanics calculation. Results show that fluorines would like to add along the circumference of the tubes instead of going down the tube axis. The (1,4) isomer has the …
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Carbon Nanotubes in Cancer Therapy
Carbon Nanotubes (CNTs) are highly attractive vehicles for the delivery of bio-molecules into living systems specifically for applications in cancer therapy. Two main types of CNTs; single-walled (SWNT) and multi-walled (MWNT) have been investigated. Pristine CNTs are poorly soluble in aqueous …
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Sensor applications of carbon nanotubes
… of published research on sensing mechanisms of carbon nanotubes was performed to identify applications in which carbon nanotubes might improve on current sensor technologies, in either offering improved performance, reduced cost of manufacture, or both. Using this overview of carbon …
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Applications and production of carbon nanotubes
Carbon nanotubes, a recently discovered form of carbon fiber with structural perfection similar to that of a fullerene molecule, have interesting electronic, chemical and mechanical properties due to their size and structure. Nanotubes have great potential as a bulk material for strong, lightweight …
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Raman spectroscopy of metallic carbon nanotubes
Metallic carbon nanotubes are one dimensional conductors that are both technologically promising for electronic applications, and scientifically interesting for studying the physics of low dimensional materials. In this thesis, we present a detailed study of the inelastic light scattering (Raman) …
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Functionalization and applications of carbon nanotubes
Carbon nanotubes (CNTs) possess a unique set of electrical and mechanical properties and have been used in a variety of applications. In this thesis, we explore strategies to functionalize CNTs as well as applications which are enabled by functionalized CNTs. Chapter 1 gives an overview of emerging …
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Mechanics of deformation of carbon nanotubes
The deformation mechanics of multi-walled carbon nanotubes (MWCNT) and vertically aligned carbon nanotube (VACNT) arrays were studied using analytical and numerical methods. An equivalent orthotropic representation (EOR) of the mechanical properties of MWCNTs was developed to model the anisotropic …
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Transplanting assembly of individual carbon nanotubes
… A deterministic assembly of individual carbon nanotubes by transplanting them to MEMS structures is demonstrated with a new assembly method, "transplanting assembly." This thesis describes development of a novel assembly technique by transforming individual CNTs assemblable, which …
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Carbon Nanotubes Attenuate Cancer and Improve Healing
Breast cancer is the most common cancer in American women and the second largest cause of their cancer mortality. Resection of the primary tumor can greatly improve the prognosis, but if any of the cancerous cells remain, the patient is still at risk. This work investigates the ability of high …
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NEW GENERATION POLYMER CONCRETE INCORPORATING CARBON NANOTUBES
… new generation of PC incorporating Multi-Walled Carbon Nano-Tubes (MWCNTs) was produced and its mechanical properties were investigated. Four mixes of PC with 0.0 (neat), 0.5, 1.0, and 1.5% MWCNTs, respectively, were prepared using low modulus polysulfide epoxy mixed with fine and coarse …
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Theoretical study of fullerences and carbon nanotubes
… simulate the binding of iron cations to [n, n] nanotubes. The binding energy from all DFT calculations increases as the nanotube diameter decreases, which can be explained by pi-orbital axis vector (POAV) theory. LSDA and PW91PW91 are believed to overestimate the binding energy while BPW91 and …
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Metallic Ground State of Functionalized Carbon Nanotubes
Single-wall carbon nanotubes (SWCNTs) are a fascinating material because they exhibit many outstanding properties. Due to their unique geometric structure, they are a paradigm for one-dimensional systems. Furthermore, depending on their chirality, they can be either metallic or semiconducting. The …
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Angle resolved dielectric response in carbon nanotubes
… "Anlre resolved dielectric response in carbon nanotubes" is dedicated to expounding the the anisotropy in the fundamental dielectric response of carbon nanotubes. While nanotubes are along their axis essentially planar graphene, the rolled up topology gives rise to entirely new …
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Field Emission Based Sensors Using Carbon Nanotubes
… kinds of field emitters that could be tried, carbon nanotubes (CNT) have a number of distinct advantages because of their unique geometrical structure, chemical inertness, mechanical stiffness, and high thermal and electrical conductivities. This dissertation describes research in which CNT …
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Electrical Response of Carbon Nanotubes Under Electrolyte
Chemical and electrical properties of carbon nanotubes regarding surface chemistry, carrier transport, current fluctuations, and electron-phonon interactions have been explored by utilizing electrolyte top gated carbon nanotube based devices. Individual semiconducting nanotubes have shown a …
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