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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 14 of 14 for “"Raman spectrometry"”.
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Basic and Practical Signal-to-Noise Considerations in Laser-Raman Spectrometry
Made available in DSpace on 2014-12-09T17:36:24Z (GMT). No. of bitstreams: 1 7000815.pdf: 4684919 bytes, checksum: 26c902920a4aceb92a53aaada9b2223b (MD5) Previous issue date: 1969
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Surface enhanced Raman spectrometry of C₆₀ in an electron tunneling gap
… using electromigration on a silicon substrate. Raman spectra were obtained for various features of this device in order to detect the presence of C6o and study its electronic properties. The 532 nm laser source showed Raman peaks at 300,522,930-980, 1570, 1900 and 2150 cm-¹ and the 632 nm laser …
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Developments in Raman spectrometry and intracavity laser absorption spectrometry for quantitative analysis
… of reflectance mode and transmission Raman spectrometry for direct non-invasive quantitative analysis of a pharmaceutical tablet with < 3% w/w active ingredient (API). In the initial part of the study, an HPLC method was devised to quantify chlorpheniramine maleate (the API) in a …
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Controlled multi-step purification of single-walled carbon nanotubes
… determined by thermo-gravimetric analysis (TGA), Raman spectrometry, ultraviolet-visible-near-IR (UV-vis-near-IR) spectrometry, fluorescence spectrometry and transmission electron microscope (TEM) spectroscopy. The purity and yield of SWNT are improved due to reduced catalytic activity of the iron …
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Surfactants and enhanced oil recovery
… High pressure liquid chromatography, mass spectrometry, Raman spectrometry, nuclear magnetic resonance spectrometry and other quantitative techniques were used. Aspects of their behaviour (as single components and as blends with co-surfactants and co-solvents) which have been considered in …
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Synthesis, characterization, and thermal properties of ceramic-fullerene thin films
… using a new application of electron impact mass spectrometry, and the structure and stability of dispersed C60 in Zr and ZrO2 have been studied using Raman spectrometry, TEM, XRD, and WDS. Strong interactions between neighboring ZrO2 grains and dispersed C60 are manifested in the decreased …
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The Art of Coffee Roasting: Investigations into Sensor Development for the Application of Controlling Coffee Roasting
… microwave resonance, and surface chemistry using Raman spectrometry. Using these different methods, I was able to produce novel and interesting measurements. Each of the measurement methods performed satisfactorily and produced novel results. These results however did not produce the desired …
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Investigation of batch and continuous crystallisation processes using non-invasive Raman and acoustic emission spectrometries
… using non-invasive, wide area illumination Raman spectrometry to identify the nucleation point, monitor crystal growth and identify the polymorphs formed. Non-invasive broadband acoustic emission (AE) spectrometry was also investigated as a means to monitor the crystallisation profile (by …
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Advanced Applications of Raman Spectroscopy for Environmental Analyses
… protocol to extract the analyte from its matrix. Raman spectroscopy is unique in its ability to detect organic or inorganic, airborne or waterborne, and embedded or adsorbed analytes within environmental systems. This ability comes from the inherent abilities of the Raman spectrometer combined …
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Modelling and analytical studies of magmatic-hydrothermal processes
… as 120-220 MPa, 450-625 °C using stable isotope, Raman spectrometry, and fluid inclusion analysis. Hydrothermal fluid had a composition of CO2-H2O±CH4, which indicates mildly reducing environment of emerald growth.
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The Preparation, Functionalization and Biomedical Applications of Carbonaceous Nanomaterials
… (M = Na, H) by X-ray photoelectron spectrometry. The Gd₃N@C₈₀(OH)~₂₆(CH₂CH₂COOM)~₁₆ also exhibited high relaxivity, and aggregates in water. The research on both pegylated and carboxylated Gd₃N@C₈₀ suggests that aggregation and rotational correlation time plays an important role in …
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Influence of impurities on the crystallisation of pharmaceutical materials
… Agency (CDHA). A liquid chromatography/mass spectrometry (LC/MS) method for the determination and quantification of metformin hydrochloride and five out of six known impurities was developed and validated during this project. This method was then used to determine the levels of these …
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Geochemical studies of earth materials
… re-equilibrated inclusions was confirmed by both Raman microprobe and quadrupole mass spectrometric analyses of the inclusions. Repeated heating of re-equilibrated inclusions to measure the dissolution temperature of chalcopyrite (Tm Cpy) results in a considerably higher Tm Cpy during each …
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Multilayer solar selective coatings for high temperature solar applications: from concept to design
… structure was studied with X-ray diffraction and Raman spectrometry was used to determine the chemical bonding of the carbon atoms; and finally, SEM and HR-TEM were employed to determine the morphology of the deposited thin films. The unique cluster tool (sited at HZDR) allowed the in-situ …