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 13 of 13 for “"surface-enhancement"”.
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Surface -enhanced Raman spectroscopic studies of organonitriles on copper colloids
Dramatic differences are observed between the surface-enhanced Raman spectra (SERS) of organonitriles mixed with copper colloids, the Raman of the free parent molecules, and the SERS for adsorption on a gold colloid. Specifically, nu(C≡N) is missing in the SER spectra involving the copper …
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Design and characterization of surface-enhanced Raman scattering nanoparticles as spectroscopic probes for biological imaging
… has only been marginally realized to date. Surface-enhanced Raman spectroscopy (SERS) is an emerging technique that offers both chemical sensitivity and specificity. This dissertation examines the rational design, synthesis, characterization, and application of SERS-based optical probes …
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Synthesis and Characterization of Titanium Zirconium Based Alloys for Capacitor Use
… creep of Ti25Zr38Be37 metallic glass for surface enhancement. A variety of mechanical and electrical properties were measured. Leakage current through the anodic dielectric was found to decrease with increasing zirconium content. Alloy treatments which produce concentration gradients (a, …
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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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Deciphering optical properties of hollow gold nanospheres
… (HGNs) demonstrate a tunable localised surface plasmon resonance ranged from the visible to near infrared (NIR) which is of significant importance for bioimaging due to the better penetration depth and reduced autofluorescence. They consist of high quality nanoshells with a small size …
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Application of surface-enhanced resonance Raman spectroscopy to chlorophyll and chlorophyll derivatives
… transfer during photosynthesis. In Sections 1-3 surface-enhanced resonance Raman spectroscopy (SERRS) has been employed to obtain Raman vibrational spectra for chlorophyll a, pheophytin a, and chlorophyll b adsorbed on a roughened silver electrode and excited from within the Soret band to the …
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Deep Learning and Optimised Nanoplasmonic Sensors for Label-free Biomedical Applications
… and identify them from a liquid biopsy sample. Surface Enhanced Raman Spectroscopy (SERS) is an ideal biosensor candidate for the investigation of biological and chemical species, especially when dealing with small volumes or low concentrations of the investigated sample. Usually, SERS are used …
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Ocular biotribology and contact lens lubrication mechanisms
… of linear soluble PVA from DAILIES on the surface of the lens was shown to be beneficial in terms of patient comfort. There was a need to develop a novel characterisation technique in order to study these effects at surfaces; this led to the study of a novel tribological technique, which …
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Enhanced Extended-Surfaces for Two-Phase Pump-Less Cooling Loops
… performance of screen laminate-enhanced extended surfaces in water at reduced pressures. A lamination of fine-filament, wire mesh is an effective surface enhancement for boiling since the surface can be configured to provide a very high density of potential bubble nucleation sites. A coating of …
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Bubble dynamics on structured surface in microchannel
Surface enhancement is a potential way to improve the performance of flow boiling in microchannels, which is considered to be one of the most promising cooling methods to solve thermal management challenges faced by future semiconductor products. Considerable research has been done on examining the …
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Engineered Plasmonic Nanostructures for Infrared Spectroscopy, Refractive Index Sensing and Nonlinear Optics
Surface plasmon – the electromagnetic interaction in metal nanoparticles and nanostructures – has been the topic of intense research activities for many years. Early researchers studied the dependence of plasmon resonance frequency on the size, shape and dielectric environment of the nanoscale …
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Setting Constraints on the Lunar Exosphere: A Comprehensive Analysis of Velocity Resolved Sodium and Potassium Line Profile Measurements
… of impact vaporization and a connection to the surface abundance of potassium. A two species study investigating the response of the exosphere to micrometeoroid impacts shows that sodium appears to have a smooth, gradual response to meteor activity, while potassium appears to have a short-term …
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Characterization of pool boiling heat transfer from porous-coating-enhanced surfaces
<p>Development of techniques for enhancement and optimization of thermal management technologies has been a highly active area of research in recent decades in response to the rapid emergence of compact, high-power electronic systems. Immersion cooling by boiling is one of the preferred methods for …