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 30 for “"metal nanoparticle"”.
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Evaluation of monolayer protected metal nanoparticle technology
Self assembling nanostructured nanoparticles represent a new class of synthesized materials with unique functionality. Such monolayer protected metal nanoparticles are capable of resisting protein adsorption, and if utilized as a coating could have broad application in a wide range of industries …
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Structural and electrical characteristics of printed metal nanoparticle networks
The structural and electrical properties of metal nanoparticle (NP) networks and their dependence on the constituent phases have been investigated. Percolation and effective media theories have been used to describe the physical properties of disordered systems, as well as providing a link between …
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Enhancement of the UV emission in metal nanoparticle-coated ZnO
… presence of a surface coating of either Au or Al nanoparticles. Two significantly different models have been proposed to explain the observed increase in the UV light output. One involving the decay of metal nanoparticles localised surface plasmons (LSP) into hot carriers and their radiative …
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Development of a plasmon resonance enhanced optical trap for characterisation of single metal nanoparticle
… methods for characterizing a trapped single nanoparticle. While there are published methods that emphasize on building up an optical trapping setup or trap single gold nanorod using high power lasers, none were found that suggests on constructing a plasmon resonance based optical trapping …
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Surface-enhanced Raman scattering of metal nanoparticle assembly in agarose and highly ordered metal nanorod arrays
This thesis examines metal nanoparticle/agarose (MNPA) gel composites and highly ordered metal nanorod arrays, fabricated by guided nucleation during oblique angle deposition (OAD), as surface-enhanced Raman scattering (SERS) substrates. The effectiveness of MNPA has been effectively demonstrated …
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Development of novel metal nanoparticle based methods for detection of bacteria using surface-enhanced Raman spectroscopy
… of adsorbed DMDS on the surface of Ag and Au nanoparticles. A variety of enhancing substrates were used, the first were arrays of Ag and Au nanoparticles which were deposited on a glass substrate from a layer of nanoparticles trapped at a liquid/liquid interface (a so-called metal-like liquid …
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The Formation of Metal Nanoparticle-Carbon Nanotube Composite Materials for the Non-enzymatic Detection of Glucose
Nano composite materials consisting of gold nanoparticles (AuNPs) and functionalised multiwalled carbon nanotubes (fMWCNTs) were initially prepared using simple synthetic reduction methods, involving the chemical agents sodium borohydride and trisodium citrate. These composites were named …
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Synthesis study of size-controlled noble metal nanoparticle systems of Re, Ir, and Os using AOT-reverse microemulsion based methodologies
… methodology for synthesizing stable, very small nanoparticles (NPs) of rhenium (Re), iridium (Ir), and osmium (Os) using a reverse microemulsion (AOT-ME) system, with AOT as the negatively charged surfactant to form and stabilize the MEs. These noble metals are among the least studied in their NP …
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Design Rules for the Nucleation, Growth, and Encapsulation of Gold Nanoparticles with Applications to Cancer Imaging
<p>Surface-enhanced Raman scattering (SERS) nanoparticles are exciting candidates for high-precision cancer imaging due to their highly specific spectral signature (Raman “fingerprint”) and propensity for passive targeting of cancerous tissues. However, the signal intensity of currently available …
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Subwavelength nanostructures for optical biosensing and rapid photochemical reactions
… reactions has been demonstrated. Photocatalytic metal nanoparticle synthesis is of significant interest in plasmonic biosening due to the simple fabrication capability. However, long synthesis time of more than 10 hours and the use of particle stabilization chemical agents hinder economical and …
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Mechanical property characterization of metal nano-particle films for MEMS devices
… of microns. In the micron-thickness regime, nanoparticle-based inks are the preferred means for material delivery, in large part due to the ability to deliver high solids content. However, sintered nanoparticle films possess unique morphology and hence different properties when compared to …
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Interaction of Metal Nanoparticles with Fluorophores and Their Effect on Fluorescence
Metal nanoparticles have recently gained popularity in many research areas due to their nanosize-related properties. Depending on the size of the metal nanoparticle, their mode of interaction with electromagnetic radiation and the outcome of this interaction vary; in turn the effect exerted on a …
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A Nanoengineering Approach to Oxide Thermoelectrics For Energy Harvesting Applications
… of merit ZT ≥ 1. We examined the effect of metal nanoparticle – oxide film interfaces on the thermal conductivity κ and Seebeck coefficient α in bilayer and multilayer thin film oxide thermoelectrics in an effort to improve the dimensionless figure of merit ZT. Since a thermoelectric's …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… Immobilization of organocatalysts and metal nanoparticles on continuous-flow microreactors offers an efficient catalytic system that exploits and enhances the advantages of both nanocatalysis and flow chemistry, the so-called flow nanocatalysis approach. Various approaches have been …
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Probing cell membrane dynamics using plasmon coupling microscopy
… dependent near-field coupling between noble metal nanoparticle (NP) labels to resolve close contacts on the length scale of approximately one NP diameter. We firstly utilize this PCM strategy to resolve interparticle separations during individual encounters of gold NP labeled …
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Towards stimuli-responsive functional nanocomposites: smart tunable plasmonic nanostructures Au-VO2
The fascinating optical properties of metallic nanostructures, dominated by collective oscillations of free electrons known as plasmons, open new opportunities for the development of devices fabrication based on noble metal nanoparticle composite materials. This thesis demonstrates a low-cost and …
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Spectroscopic Studies of Small Molecule Oxidation Mechanisms on Cu/TiO2 Aerogel Surfaces
… at the gas-surface interface of oxide-supported metal nanoparticle materials. High vacuum conditions allowed for systematic investigations to describe detailed reaction mechanisms. Specifically, variable temperature infrared spectroscopy was utilized to uncover the binding energetics of CO to the …
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Synthesis and Activation of Nanoscale Dendrimer-Derived Supported Noble Metal Catalysts
… as templates for the preparation of supported metal catalysts. This approach takes advantage of several unique characteristics of these dendrimers such as the ability to complex metal cations in solution and to protect them from aggregation until they are impregnated onto a support. After the …
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Advanced in situ hydrogel assembly for guiding molecular release
… for cells, bioactive molecules, and even metallic nanoparticles, there were extensive efforts to control the rate and direction of embedded molecular release, largely by additional chemical modification of gel-forming polymers. However, these approaches often encountered several challenges …
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