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 74 for “"single wall"”.
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Raman spectroscopy of single wall carbon nanotubes
A single wall carbon nanotube (SWNT) is a new form of carbon, whose atomic arrangement is equivalent to a graphene sheet rolled into a cylinder in a seamless way. The typical diameter of a SWNT ranges from 0.6 nm to several nm and the typical length ranges from tens of nm to several cm. Due to its …
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Thermal transport in individual single-wall carbon nanotubes
… of phonon transport in individual suspended single-wall carbon nanotubes (SWCNTs). A microfabricated device consisting of two adjacent suspended membranes, each with a platinum resistance heater and thermometer, was used to directly measure the thermal conductance of three individual SWCNTs. …
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Large scale production of single wall carbon nanotubes
Single wall carbon nanotubes (SWNTs) possess many properties that are both novel and desirable. Most notable of said properties include electrical conductivity (metallic and semiconducting), high thermal conductivity, directionality in both electrical and thermal conductivity, high geometric aspect …
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Atomic-level investigation of fluorinated single-wall carbon nanotubes
… in particular fluorination, of single-wall carbon nanotubes (SWNTs) for the purposes of solvation and subsequent chemical reaction. Towards this end, this thesis reports the investigation of fluorinated SWNTs (fluorotubes) performed by scanning tunneling microscopy (STM). This …
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Functionalization, growth and applications of single wall carbon nanotubes
… properties, 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 …
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Electrical properties of various single-wall carbon nanotube networks
… of covalently and non covalently functionalised single wall carbon nanotube (SWCNT) networks. Unlike previous strategies where diamines were used, a novel route to covalently bridge SWCNTs by organic molecular linkers is proposed. The bridging relies on using modified Sonogashira and Ullmann …
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Science of single-wall carbon nanotubes: Purification, characterization and chemistry
… diameters can be produced. Purification of single wall carbon nanotubes produced by laser-oven and HiPco process is also discussed. Metal catalyzed oxidation at low temperature has been shown to selectively remove non-SWNT carbon and permit extraction of metals with concentrated HCl. These …
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Photochemical Tailoring of Single-Wall Carbon Nanotubes by Photoexcited Sodium Hypochlorite
Single-wall carbon nanotubes (SWCNTs) are intriguing 1D nanomaterials whose unusual electronic properties are of interest for a wide array of applications. More specifically, semiconducting SWCNTs have structure-specific electronic transitions that allow for discrete near-infrared fluorescence …
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Single wall carbon nanotubes as viscosity modifiers in polypropylene matrix nanocomposites
Single wall carbon nanotubes (SWNTs) were studied as low shear rate viscosity modifiers in the polypropylene matrix of nanocomposites. To create nanocomposites which did not demonstrate increased low shear rate viscosity when nanotubes were added into the polymer melt, this work focused on …
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Variance Spectroscopy and its Application to the Study of Single-Wall Carbon Nanotubes
… spectroscopy and its application to characterize single-wall carbon nanotube (SWCNT) dispersions. This technique measures and analyzes changes in photoluminescence intensity caused by statistical variations in the local composition of dilute nanoparticle samples. The data are spectrally resolved, …
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Synthesis of Single Wall Carbon Nanotube Arrays and Their Application in Single Molecular electronics
… there are major challenges to be solved before single molecular electronic device could be used widely. One of these challenges is the lack of high yield, low cost fabrication technique. Carbon nanotubes are new materials with great electronic conductivity and small diameter, etc. They are great …
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Thermoelectric Properties and Transport of Semicrystalline Conjugated Polymer and Single-Wall Carbon Nanotube Composites
… that embeds highly-purified semiconducting single-walled carbon nanotube network (s-SWCNTs) with poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT). s-SWCNTs and PBTTT are selected due to their fairly well-studied thermoelectric properties and to achieve a good understanding …
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The response of a single wall space structure to impact by cometary meteoroids of various shapes
… impact. The stress at the origin is reduced to a single definite integral and the deflection to the Hankel inversion integral, both requiring definition of the particular projectile before further evaluation. A particular cometary meteoroid is mathematically represented in the analysis by its …
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The Effects of Cesium Deposition and Gas Exposure on the Field Emission Properties of Single Wall and Multiwall Carbon Nanotubes
… on the field emission (FE) properties of single-walled carbon nanotube (SWNT) bundles were studied. In addition, a comparative study was made on the effects of O2, Ar and H2 gases on the field emission properties of SWNT bundles and multiwall carbon nanotubes (MWNTs). We observed that Cs …
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Carbon nanotubes as interconnect for next generation network on chip
… better performance when compared with their single-core equivalent. Recently, Networks-on-Chip (NoC) have emerged as a communication methodology for multi core chips. Network-on-Chip uses packet based communication for establishing a communication path between multiple cores connected via …
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A magnetorheological study of single-walled and multi-walled carbon nanotube dispersions in mineral oil and epoxy resin.
Single wall carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs) were dispersed in mineral oil and epoxy resin. The magnetorheological properties of these dispersions were studied using a parallel plate rheometer. Strain sweeps, frequency sweeps, magneto sweeps and steady shear tests …
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Alignment and characterization of carbon nanotubes of photolithographically patterned electrodes
… an (n,m) assignment for individual 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 …
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