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 28 for “"Raman microscopy"”.
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Raman microscopy studies of carbon particles from diesel particulate matter (DPM) and coal dust
… and coal dust samples were characterised using Raman microscopy, X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS), Thermo-Gravimetric Analysis (TGA), X-ray Fluorescence (XRF) spectrometry and Scanning electron Microscopy. The sp2/sp3 …
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ATR-FTIR spectroscopy and Raman microscopy studies of organosilane diffusion and hydrolysis in PVC films.
… transform infrared spectroscopy (ATR-FTIR) and Raman confocal microscopy have been used to study the diffusion, hydrolysis and condensation of three organosilanes in silicon / PVC / silane laminates. These processes are thought to contribute to the formation of the IPN, and hence to be vital for …
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Oh cryoprotectant, wherefore art thou cryoprotectant? Investigation of the permeation of common cryoprotectants into live rice callus cells by coherent Raman microscopy
… these mixtures. Vibrational microscopies, like Raman or infrared microscopy, allow the direct visualization of cryoprotectants interacting with living cells. By exciting vibrations unique to the bonds in a molecule, these techniques can effectively image nearly unadulterated molecules. Through …
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Interpreting Raman spectra using machine learning: towards a non-invasive method of characterizing single cells
Raman microscopy has the potential to non-destructively measure the biomolecular changes in single cells in a label-free manner. However, the extent to which Raman spectra can effectively infer biologically-relevant information is not well understood. In this thesis, we use machine learning methods …
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Towards real-time monitoring of bacterial cultures without the need for physical sampling: elastic scattering, fluorescence and Raman spectroscopy of Escherichia coli cultures.
… the biofilm thickness as measured by confocal Raman microscopy and confocal fluorescent microscopy. Drying/rehydration experiments performed on films withstood multiple cycles, returning to the same optical thickness proving their robust nature. The strength of a distinct water peak (1451 nm) …
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Raman microscopic studies of PVD deposited hard ceramic coatings.
… magnetron deposition process were studied using Raman microscopy. Characteristic spectra from binary, multicomponent, multilayered and superlattice coatings were acquired to gain knowledge of the solid-state physics associated with Raman scattering from polycrystalline PVD coatings and to compile …
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Interpreting Forensic Trace Evidence using Multi-Elemental and Spectroscopic Data
… to the techniques like LIBS, LA-ICP-MS and Raman Microscopy that generate multivariate spectroscopic data, has necessitated the need for advanced statistical methods for evidence analysis. The first aim of this thesis is to ascertain reliability and repeatability of evidential data generated …
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On the phase transition and photo-reactivity on the micro-sized titanium dioxide single crystal.
… to the bulk single crystals. Scanning Electron Microscopy (SEM), Raman Microscopy, and Photoluminescence (PL) Microscopy are used for characterization. The ART study shows the transition is surface-initiated and mainly surface-controlled with two distinct transition pathways observed. The phase …
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Nonlinear interferometric vibrational imaging for applications in the study and diagnosis of breast cancer
… thesis deals with the problem of developing a microscopy imaging technique with fast acquisition rates and label-free chemical selectivity for the study of tumor formation and its diagnosis in early stages of development. Spontaneous Raman scattering microscopy studies on human breast …
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Development and Verification of Poroelastic Barrier Model With Active Transport: Application in Human Epidermis
… mass fraction profiles obtained in vivo from Raman microscopy experiments are used to extract the model parameters. The verification of our work is achieved by successfully reproducing experimental data under transient conditions. Finally, numerical studies of water transport and …
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Light Scattering Spectroscopy of Tissue Phantoms for Applications in Biomedical Sciences
… properties of samples are probed with Brillouin microscopy, through interactions of light with acoustic phonons (sound waves), and their chemical information is revealed with Raman microscopy, through interactions of light with molecular vibrations. Both techniques are non-contact, …
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Optical Properties of Individual Nano-Sized Gold Particle Pairs
… of this thesis – scanning particle-enhanced Raman microscopy (SPRM). This device comprises a scanning probe carrying an MNP which in turn is coated with a molecule of known Raman signature. By manoeuvring this outfit MNP into the vicinity of an illuminated second MNP and by measuring the …
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Vibrational Spectroscopy and Atomic Force Microscopy Studies of Silane Adsorption onto Silicon and Glass.
… (FTIR-ATR), spectroscopy and by atomic force microscopy, (AFM). The rate of formation of the monolayers and the effect of surface coverage on the packing of these long-chain molecules was studied by both methods and the results compared. The silica surface was provided by the native silicon …
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Development of Nanodiamond and Raman Spectroscopy Sensing Methods towards the Measurement of Mitochondrial Membrane Potential in Single Cells
… measure $\Delta\Psi_{\textrm{m}}$. Furthermore, Raman spectroscopy was identified as a label-free chemical sensing technique that could be used to reveal the location and chemical composition of the mitochondria in cells. To achieve the aim of detecting changes in $\Delta\Psi_{\textrm{m}}$ using …
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Vibrational spectroscopy studies of interdiffusion in polymer laminates and diffusion of water into polymer membranes.
Confocal Raman microspectroscopy has been used to study the interdiffusion in polymer laminates at the interfacial region between the constituent polymer layers. The effects of the polymer molecular weight, annealing temperature, and annealing time have been studied. Three different laminates with …
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Solubility Enhancement and Precipitation Inhibition of Poorly Water Soluble Compounds Utilizing Hot Melt Extrusion Technology
… and 21.64, respectively. </p> <p>Polarized light microscopy, Fourier transform infrared spectroscopy (FT-IR), Raman microscopy, differential scanning calorimetry (DSC), X-Ray diffraction (XRD), and scanning electron microscopy (SEM) were explored to characterize the FEL-SOL solid dispersions, and …
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Rapid High-Throughput Screening Methods for Monitoring Electron Transfer Reactions in Biological Systems and Microalgae Phenotyping
… the phenotypes and health of our microalgae, Raman microscopy was applied to algal cultures of Scenedesmus sp. A6 grown under stress. Statistically unique phenotypes were found based on environmental factors during cell growth. ANOVA analysis determined the effect of stressors that caused …
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MONTE CARLO MODELING OF DIFFUSE REFLECTANCE AND RAMAN SPECTROSCOPY IN BIOMEDICAL DIAGNOSTICS
… MC models to include low-cost devices and model Raman scattering phenomena as they relate to clinical diagnoses. The massive increase in computational capacity afforded by GPU acceleration dramatically reduces the time necessary to model and optimize optical detection systems over a wide range of …
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Raman spectroscopic characterisation of inorganic fibres and particles and their coverage by wetting agents.
… of fibres is then considerably reduced. Raman microspectroscopy has been shown to be a very powerful technique for the identification of micrometer-sized fibres and particles, with little or no sample preparation. Such spectra are sensitive to the composition of the material and can often …
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