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 336 for “"CNTs"”.
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Experimental and theoretical investigation of self-sensing CNTs-based cementitious composites [Indagine sperimentale e teorica sui compositi cementizi self-sensing a base di CNTs]
… di compositi cementizi self-sensing a base di CNTs. È stata condotta un’ampia campagna sperimentale per valutare in modo sistematico gli effetti di differenti tipi di matrice e agenti disperdenti sul comportamento meccanico, elettrico ed elettromeccanico dei compositi rinforzati con CNT. …
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Characterization of composites with aligned carbon nanotubes (CNTs) as reinforcement
Carbon nanotubes' (CNTs) superlative combination of electrical, thermal, and especially mechanical properties make them ideal candidates for composite reinforcement. Nanocomposites and hybrid composite architectures employing traditional advanced composites and CNTs offer significant potential …
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Carbon Nano Tubes (CNTS) for the development of high-performance and smart composites.
Los nanotubos de carbono han atraído una enorme atención en los últimos años debido a sus propiedades multifuncionales sobresalientes. Un número cada vez mayor de trabajos de investigación de primera línea centran su interés en la búsqueda de aplicaciones prácticas que den uso de las notables …
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Mechanical enhancement of woven composites with radially aligned carbon nanotubes (CNTs) : investigation of Mode I fracture toughness
… woven composites with aligned carbon nanotubes (CNTs) integrated into the bulk composite, focusing here particularly on interlaminar reinforcement at ply interfaces. Implementing aligned CNTs takes advantage of their scale and superior specific stiffness and strength, with in-plane properties …
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Direct Growth of Carbon Nanotubes on Inconel Sheets Using Hot Filament Chemical Vapor Deposition
Carbon nanotubes (CNTs) have great potential in many applications due to their unique structure and properties. However, there are still many unsolved problems hampering their real applications. This thesis focuses on three important issues limiting their applications, namely: (1) direct growth of …
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Nonlinear vibration and chaotic motion of uniform and non-uniform carbon nanotube resonators.
Vibration analysis of carbon nanotubes (CNTs) is very essential field owing to their many promising applications in tiny instruments. The unique and interesting properties of CNTs, particularly their mechanical and electrical features, have fascinated industries and researchers to implement CNTs …
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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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Computing Wall Thickness and Young's Modulus of Carbon Nanotubes with Atomistic Molecular Dynamics Simulations
Carbon nanotubes (CNTs) are tubular structure of a layer or layers of carbon atoms. CNTs serve as a prototypical nanomaterial holding great promises for various basic and applied research applications in the fields of electrical, thermal, and structural materials owing to their superlative …
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Force-modulated growth of carbon nanotube forests
Carbon nanotubes (CNTs) can have exceptional mechanical, thermal, and electrical behavior, but successful use of CNTs in macroscale materials requires scalable processes to organize CNTs while preserving their intrinsic properties. Although the chemical influences on CNT growth have been subject to …
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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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Chemical, mechanical, and thermal control of substrate-bound carbon nanotube growth
Carbon nanotubes (CNTs) are long molecules having exceptional properties, including several times the strength of steel piano wire at one fourth the density, at least five times the thermal conductivity of pure copper, and high electrical conductivity and current-carrying capacity. This thesis …
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Generation of Multi-Scale Thermoplastic Composites for Use in Injection Molding and Fused Filament Fabrication
… of TLPC reinforced WTCs, carbon nanotubes (CNTs) are considered being used as a secondary enhancement in WTCs. CNTs have gathered significant interest in the last 30 years because of their high aspect ratio, high mechanical properties, and other high-performance properties. The focus of this …
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Characterization of carbon nanotubes grown by chemical vapour deposition
Carbon nanotubes (CNTs), discovered by Ijima in 1991, are one of the allotropes of carbon, and can be described as cylinders of graphene sheet capped by hemifullerenes. CNTs have excellent electrical, mechanical, thermal and optical properties and very small size. Due to their unique properties and …
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Next Generation Multifunctional Composites for Impact, Vibration and Electromagnetic Radiation Hazard Mitigation
… based on surface grown carbon nanotubes (CNTs) on carbon fibers' yarns. This study embraces the development of a novel low temperature synthesis technique to grow CNTs on virtually any substrate. The developed method graphitic structures by design (GSD) offers the opportunity to place CNTs …
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Large-scale fabrication and assembly of carbon nanotubes via nanopelleting
… and geometrically uniform carbon nanotubes (CNTs), which has limited successful commercial applications to date. This thesis investigates a process, termed nanopelleting, for the handling and assembly of CNTs that allows integration into multi-scale systems with direct control over CNT …
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Synthesis and mechanical characterization of aligned carbon nanotube metal- and carbon-matrix nanocomposites
… conductivity, and elastic properties make CNTs ideal for many aerospace, automotive, and electrical applications. In structural materials, CNTs are an outstanding candidate to provide nano-reinforcement, both in hybrid composites and nanocomposites, and they have been found to improve the …
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Large Scale Simulations of Conduction in Carbon Nanotube Networks
… wires fabricated from carbon nanotubes (CNTs) are an exciting new material that aims to replicate the exceptional electric properties of microscopic individual CNTs in a macroscopic scale material. Recently there have been significant experimental advances that allow these wires to be …
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Carbon nanotube synthesis for integrated circuit interconnects
Based on their properties, carbon nanotubes (CNTs) have been identified as ideal replacements for copper interconnects in integrated circuits given their higher current density, inertness, and higher resistance to electromigration. Although at the laboratory level CNTs have proven their technical …
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Aquatic toxicity of one dimensional carbon nanomaterials
… As-produced or modified carbon nanotubes (CNTs) and silicon carbide nanowires (SiCNW) were selected to represent CNMs. Sediment tests were conducted for 10-d with SiCNW and for 14- and 28-d with CNTs using amphipods. Sonicated SiCNW in water were toxic to the amphipods but not to the midge, …
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Investigation of CNT-induced Escherichia coli Lysis and Protein Release
… investigated the use of carbon nanotubes (CNTs) as a treatment to increase the permeability of a bacterial cell wall. Recombinant Escherichia coli BL21 (DE3) containing a plasmid that expressed Green Fluorescent Protein (GFP) and -lactamase were exposed to CNTs under various levels of …
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