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 97 for “"Surface Enhanced Raman Spectroscopy (SERS)"”.
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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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Investigation into the use of surface-enhanced Raman spectroscopy (SERS) for organic dye analysis
… invasive and destroy the samples in the process. Surface-enhanced Raman spectroscopy (SERS) has recently been identified as a technique that is minimally invasive and also solves the issue of fluorescence that is found in many other techniques. In this paper, a specific SERS procedure has been …
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In-situ electrochemical spectroscopy and probe microscopy studies of electrodeposition
… on Au was studied using cyclic voltammetry (CV), surface enhanced Raman spectroscopy (SERS), in-situ electrochemical scanning tunneling microscopy (EC-STM), and in-situ electrochemical atomic force microscopy (EC-AFM). CV results show the evolution of the deposited species as a function of scan …
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Development of Gold Nanocluster-Based Biosensors
… of ultrasensitive biosensors based on surface-enhanced Raman spectroscopy (SERS). Manipulation of gold nanoclusters in a predictable and reproducible manner for the application of refined biochemical analysis still remains challenging. In this study, high-purity gold nanoclusters are …
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Performance assessment of Au SERS substrates prepared by deposition of Au nanoparticles on screen-printed SiO2 particle films
Surface-enhanced Raman spectroscopy (SERS) is a highly studied technique for simple and rapid trace analysis. Screen-printing, a low-cost fabrication method, has been proposed as a reproducible and affordable approach for the preparation of 3D SERS-active substrates. In this work, a new …
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Large area plasmonic nanostructures design, fabrication and characterization by laser
… by free electron oscillations at the metal surface provide promising applications, of which plasmonic sensing is a prime example. However, the development of practical, low-cost nanoscale manufacturing tools and processes capable of realizing these advanced applications is still one of the …
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Enhancement and extinction effects in surface-enhanced stimulated Raman spectroscopy
Surface-enhanced Raman spectroscopy (SERS) is a technique that allows one to probe the vibrational modes of molecules with great precision. However, current methods involve the enhancement of local fields from spontaneous Raman scattering near a metallic substrate. By utilizing stimulated Raman …
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Biocompatible silicon nitride thin films for self-rolled-up microtube technologies: guiding neurons
… to be integrated into the same channel as a surface-enhanced Raman spectroscopy (SERS) sensor. Further, analyte size exclusion is possible via diameter variation and surface functionalization, adding another degree of precision. Extending this platform beyond sensing to cellular growth …
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Synthesis and characterization of nanoparticle suspensions: Towards quantitative surface-enhanced Raman spectroscopic sensing
Surface-enhanced Raman spectroscopy (SERS) is an ultrasensitive technique with applications ranging from in vitro and in vivo biological sensing to chemical and explosives detection. In this thesis, we explore the design and characterization of suspensions of nanoparticles prior to their use for …
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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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Sensing Interfacial Non-Faradaic and Faradaic Processes via Plasmonic-Enhanced Metallic Luminescence in Nano-Optoelectrodes
Metallic nanostructures supporting surface plasmon modes can concentrate optical fields, and enhance luminescence processes from the metal surface at plasmonic hotspots. Such nanoplasmonic metal luminescence contributes to the spectral background in surface-enhanced Raman spectroscopy (SERS) …
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Detection of trace concentrations of small and big molecules through vibrational spectroscopy
… we aim to detect analytes of varying sizes using surface-enhanced Raman spectroscopy (SERS) without the need for customizing the morphology of nanostructured substrate. Signal enhancement in SERS occurs near plasmonic nanoparticles within "hotspots" (<10 nm), which limits detection to molecules …
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Porous Gallium Nitride Generated by Electroless Etching: Morphology, Optical Properties, and Sensing Applications
… porous GaN has been functionalized for use as a surface enhanced Raman spectroscopy (SERS) substrate by solution-based electroless deposition and vacuum evaporation of Ag and Au. SERS enhancement factors up to 10 8 have been observed for Ag-coated porous GaN, allowing the spectroscopic detection …
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Bimetallic Nanoporous Sponges
… from its bulk counterpart, including high surface area, enhanced chemical sensing and tuneable optical and electrical properties. This thesis explores the fabrication and characterisation of np-S thin films and bulk structures using the dealloying method. Ag-Al alloy precursors with varying …
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Light-matter interactions in all-dielectric silicon nanoresonators
… infrared wavelengths, nanoantennas, molecular spectroscopy, surface-enhanced Raman spectroscopy (SERS) and subwavelength cavities.
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Self-rolled-up microtube technology for cellular outgrowth guidance and monitoring
… the metal added to this structure can act as a surface-enhanced Raman spectroscopy (SERS) sensor. Further, analyte size exclusion is possible via diameter variation and surface functionalization, adding another degree of precision. Extending this platform beyond sensing to cellular growth …
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Biomembranas formuojančių monosluoksnių ir adsorbuotų biomolekulių struktūros tyrimas virpesinės spektroskopijos metodais /
… (tBLM) and laccase enzymes at the electrode surface in water and controlled electric potential environments. Water is crucial in maintaining the native state of biomolecules, while the electric methods are widely used in studying such biomolecules. To realize how these forces affect the …
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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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Visualization, Characterization, and Analysis of Gold Nanoparticles Fate and Transport in Aqueous Porous Media Environment with Advanced Photonics Technique
… Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. Surface-enhanced Raman spectroscopy (SERS) was developed as a new technique to investigate AuNP aggregation in water with varying salt levels. The SERS technique proved valuable as an analytical technique, elucidating information about aggregation …
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