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 20 for “"Raman Imaging"”.
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Computational Raman imaging and thermography
… In this thesis, we present our home-built Raman microscope for Raman imaging and thermography. The performance of this instrument is enhanced by computational approaches. The body of the thesis will be divided into three parts. First, the instrumentation of our setup are introduced. Second, …
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Mineralogical characterization of coal fly ashes via Raman imaging
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Raman imaging of cementitious carbonation: A spatio-temporal investigation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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Understanding variability in performance of type il cements: insights from Raman imaging
… diffractometry, X-ray diffraction (XRD), and Raman imaging. A key contribution of the work is also the development of an automated Raman imaging algorithm that improves reproducibility by relying on objective criteria for Raman band and peak-top band selection. Performance testing revealed …
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Characterization of liquid crystal on silicon SLMs for in-situ Raman imaging for quality control of processed lunar regolith
… and vibration. To extend the capabilities of a Raman spectrometer from point measurements to scanning a target surface to evaluate material properties, point mapping, a scanning of the surface with the focused laser, is an essential technology. Focusing and steering a laser for Raman …
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Developing Stimulated Raman Spectroscopic Techniques For Imaging Below the Optical Diffraction Limit
Stimulated Raman spectroscopy (SRS) is a technique that amplifies the normally weak Raman scattering process using an additional laser beam, resulting in increased signal amplitudes. For this reason, it has been developed as a biological imaging platform with the potential to be used as an …
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Molekulare Endospektroskopie: Neue instrumentell-analytische Methoden zur medizinischen Diagnostik
… Ebene charakterisiert wird. Infrarot- (IR-) und Raman-Spektroskopie bieten dabei besondere Vorteile, da sie zu den molekülspektroskopischen Verfahren mit dem höchsten Informationsgehalt gehören. Beide Methoden beruhen auf Molekülschwingungen, deren Spektren einen chemischen Fingerabdruck über die …
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Gaseous Reactive Flows Around Catalytically Combusting Micro-Wires
… with minimal blockage of frontal area. Line Raman imaging of major combustion species was performed downstream the catalytic wire and in combination with the PIV results showed that both species distribution and velocity fields differ significantly between lean and rich conditions.
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Investigating the thermal behavior differences between beet and cane sugar sources
… Liquid Chromatography (HPLC), and Confocal Raman imaging and spectroscopy. From this study we found that the pH, conductivity ash, and moisture content values varied widely within and between sugar sources, and were not able to explain the small endothermic DSC peak difference between beet …
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Optical characterisation of the interaction between calcium-silicate based dental restorative materials and dentine
… aged in an in-vitro model. Fluorescence lifetime imaging and second harmonic generation imaging were also used for the characterisation of re-mineralisaion and collagen denaturation respectively. For the chemical analysis, Raman spectroscopy was applied to analyse the chemical composition of the …
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Iron-Doped Titanium Dioxide Nanomaterials: Synthesis, Characterization and Photodegradation Catalytic Behavior
… and that they indeed have smaller band gaps. Raman imaging was also employed to map the various phases present in our samples and to identify surface functionalities on the materials and their accessibility to binding especially with dyes, such as N3 and Z907 dye, for the first time. The …
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Quantum gas microscopy of strongly correlated fermions
… concerns quantum gas microscopy. With the use of Raman transitions, ID spin-orbit coupling of ultracold 6Li was realized. Using a novel type of spectroscopy, spin-injection spectroscopy, where the spin, energy, and momentum are all resolved, we directly observed the spinful dispersions of the …
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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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Black silicon and its applications in photovoltaics and biosensing
… for optical analysis including surface enhanced Raman spectroscopy (SERS) and fluorescence imaging. We call it “black silver” substrate. The unique physical property of the black silver substrate permits the enhancement in optical absorption from UV to NIR range by 12 times, the surface …
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Application of raman spectroscopy in pharmaceuticals
Experimental research on the use of Raman spectroscopy as an in- and on-line sensing tool and a complementary characterization technique for pharmaceutical applications is presented in this thesis. In the first chapter following a broad overview, the use of Raman spectroscopy, together with x-ray …
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Bio-butanol fuel atomization and combustion processes
… combustion species were measured using line Raman imaging and K-type thermocouples were used in order to perform temperature scans across the flame. Also, extinction strain rates were measured as a function of overall stoichiometry. Butanol flames were compared with flames of methane (which …
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Investigations of the electronic, vibrational and structural properties of single and few-layer graphene
… including atomic-force microscopy (AFM) and Raman, infrared (IR), and ultrafast optical spectroscopy. With respect to its mechanical properties, SLG is known to be capable of undergoing significant mechanical deformation. We have applied AFM to investigate how the morphology of SLG is …
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Study of antimicrobial and antioxidant properties of new materials for development of active food packaging
… device combining dielectrophoresis (DEP) and Raman spectroscopy was developed for a fast and dynamic characterization of different bacterial strains, including food-related pathogens (i.e. E. coli and S. aureus), directly in planktonic suspension. Predictive models to identify bacterial …
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Multi-modal imaging of cementitious carbonation front – insights on performance of low-clinker blends
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Multi-modal characterization of cements and irradiated granites
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01