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 137 for “"surface enhanced Raman spectroscopy"”.
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Tailored Materials for Surface-Enhanced Raman Spectroscopy
Surface-enhanced Raman spectroscopy (SERS) is a useful analytical tool that has grown in popularity since its discovery 40 years ago. Presently, a large number of materials are used as SERS substrates, including thiol-functionalised nanoparticles which form a large class of SERS-active materials as …
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Surface-Enhanced Raman Spectroscopy Enabled Microbial Sensing
… result in high costs and long turnaround times. Surface-enhanced Raman spectroscopy (SERS)-based techniques have been proposed to overcome these limitations. In this dissertation, we discuss work conducted to develop novel SERS-based methods to enable both sensitive microbial quantification and …
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Plasmonic Au nanostructures for surface-enhanced raman spectroscopy
Raman spectroscopy is a spectroscopic technique that provides rich structural information for identifying chemical species but finds limited applications owing to its low sensitivity. Surface-enhanced Raman spectroscopy (SERS) is capable of solving the issue of sensitivity by enormously amplifying …
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Bio-interfaced Nanolaminate Surface-enhanced Raman Spectroscopy Substrates
Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique that combines molecular specificity of vibrational fingerprints offered by Raman spectroscopy with single-molecule detection sensitivity from plasmonic hotspots of noble metal nanostructures. Label-free SERS has attracted …
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Application of Surface Enhanced Raman Spectroscopy to Biological Systems
In dieser Arbeit wurden die Resonanz-Raman-Spektroskopie (RR-Spektroskopie) sowie die oberflächenverstärkte Resonanz-Raman-Spektroskopie (SERR-Spektroskopie) verwendet, um biologische Systeme, insbesondere Hämproteine, zu untersuchen. Der elektronische Übergang der Hämgruppe kann ausgenutzt werden, …
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Characterisation of bacteria by surface enhanced Raman spectroscopy (SERS)
… molecular, and spectroscopic techniques. Surface-enhanced Raman spectroscopy (SERS) has received considerable attention as a potential method for the characterisation of bacteria.<br/><br/>The aims of this thesis were to (i) develop a SERS method that would characterise and distinguish …
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Surface Enhanced Raman Spectroscopy for Diagnostics in Ocular Health
This thesis focuses on the development of a Surface-Enhanced Raman Spectroscopy (SERS) assay for detecting biofilms in ocular health. Biofilms are complex communities of microorganisms encased in an extracellular polymeric substance (EPS) that present significant challenges for clinical diagnostics …
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Gold nanoshells for surface enhanced Raman spectroscopy and drug delivery
… of the ionic core, phenomena known as localized surface plasmons. The free electron oscillation creates surface plasmon multimodes of various orders. As a result, the average local near field surrounding the Au nanoshell is enhanced. The local field enhancement has been extensively used in …
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Unlocking single molecule detection sensitivities in surface-enhanced Raman spectroscopy
Single molecule detection sensitivities in surface-enhanced Raman spectroscopy require uniform fabrication of sub-5nm gaps between plasmonic nanoparticles over large areas. For this purpose, researchers have employed ultra-precise fabrication techniques like electron-beam lithography that offer …
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Surface-Enhanced Raman Spectroscopy for Environmental Analysis: Optimization and Quantitation
… sensitivity and fingerprint specificity, surface-enhanced Raman spectroscopy (SERS) has been widely employed for heavy metal, organic compound, and pathogen detection. However, SERS quantitation is challenging because 1) analytes do not stay in the strongest enhancing region ("hot spots") …
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Silicon nano-structure fabrication and application for surface-enhanced Raman spectroscopy
… on micro- and mesoscale nonplanar surfaces, a nano-pillar forest is fabricated on nonplanar silicon surfaces in various morphologies such as silicon atomic force microscopy (AFM) tips and pyramidal pits. By integrating nano-pillars on inverse silicon micro-pyramid array devices, we …
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Paper-Based Sensors for Contaminant Detection Using Surface Enhanced Raman Spectroscopy
Surface enhanced Raman spectroscopy (SERS) is highly promising analytical technique for trace detection of analytes. It is particularly well suited for environmental analyses due to its high sensitivity, specificity, ease of operation and rapidity. The detection and characterization of …
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Surface Enhanced Raman Spectroscopy as a Tool for Waterborne Pathogen Testing
… from harmful pathogens. Here we have utilized surface enhanced Raman spectroscopy (SERS) in a sensitive multiplex pathogen detection method. Two strategies are proposed herein, one that utilizes SERS antibody labels and one that measures the intrinsic SERS signal of organisms. For the SERS …
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Probing molecular adsorption on nobel metal nanosurfaces with surface-enhanced raman spectroscopy
… molecular adsorption on plasmonic metal NPs via surface-enhanced Raman spectroscopy (SERS)”. The first work mainly focus on understanding and rationalizing the competitive adsorption of binary adsorbates on nanoparticles. 3D mathematic models which can accurately predict the final distribution of …
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From fano to nano: mechanisms and applications of surface enhanced raman spectroscopy
Surface enhanced Raman scattering/spectroscopy (SERS) is a trace sensing technique that uses collective surface electron oscillation-light excitations (plasmon-polaritons) to enhance the inelastically scattered light (Raman scattering) from a material of choice. However, SERS studies suffer from a …
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Surface enhanced Raman spectroscopy based on black silver and micro-pyramids array
Surface-enhanced Raman spectroscopy (SERS) has been increasingly utilized as an analytical technique with significant chemical and biological applications due to its high sensitivity, selectivity and accuracy. As nanotextured surfaces play a key role in SERS, production of highly sensitive, low …
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Scalable Electrochemical Surface Enhanced Raman Spectroscopy (EC-SERS) for bio-chemical analysis
… 1000 Hz). Moreover, by electrochemical impedance spectroscopy (EIS) measurements and equivalent circuit modeling-analysis, we can decompose the overall impedance of MWCNT/polymer nanopillar arrays in the electrolyte into multiple bulk and interfacial circuit components, and thus can illustrate …
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Rational Design and Advanced Fabrication of Metallic Nanostructures for Surface-Enhanced Raman Spectroscopy
… the promising methods for such purpose, optical spectroscopy such as surface-enhanced Raman scattering is considered a suitable option. This spectroscopic technique takes advantage of the interaction between an optical field and metallic nanostructures to magnify the electromagnetic field in the …
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Raman and Surface-Enhanced Raman Spectroscopy Imaging of Droplets: Characterization and Environmental Implications
… system, either suspended in air or deposited on surfaces, can carry pathogens (e.g., influenza viruses, the SARS-CoV-2 virus), and are thus important for disease transmission. The need to understand the role of droplets in environmental processes requires appropriate tools for droplet …
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