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 10 of 10 for “"UV-Vis-NIR-spectroscopy"”.
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Magnetite Oxidation in Aqueous Systems
… products, maghemite, by the use of UV-Vis-NIR spectroscopy. As oxidation proceeded at a constant specific temperature, the concentration of magnetite decreases, which was indicated by a decrease in absorption in the NIR-region of the spectrum. As magnetite concentrations decreased, …
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Synthesis, Characterization, and Mixed-Valence Studies of Conformationally Constrained Bisferrocenyl Complexes for the Study of Through-Space S***π; Interactions
… were studied by ultra-violet photoelectron spectroscopy (UPS), cyclic voltammetry, differential pulse voltammetry, UV-Vis-NIR spectroscopy and DFT computations. Electrochemical results show two, fully reversible 1e⁻ redox processes for the ferrocenes where the separation of peaks is affected …
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Synthesis, characterisation and applications of bimetallic nanoparticles
… NRs. Powerful experimental techniques viz. UV-Vis NIR spectroscopy and electron microscopy (STEM) were employed to characterise the monometallic and bimetallic AuNRs. AuNSs, AuNRs, Au@Pd NRs, Au@Pd NSs, Au@Pt NRs and Au@Rh core-shell nanorods were synthesised and characterised by one or both …
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LINEARLY EXTENDED PYRYLIUM SALTS (LEPS) AND LINEARLY EXTENDED THIOPYRYLIUM SALTS (LETS) AS ORGANIC SEMICONDUCTORS
… computation and studied experimentally by UV-Vis-NIR spectroscopy, cyclic voltammetry, single crystal X-ray diffraction, ESR and variable temperature NMR (VT-NMR) experiments.</p> <p>The LEPS and LETS compounds described here show moderate to high solubilities in organic solvents like …
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Science of single-wall carbon nanotubes: Purification, characterization and chemistry
… is documented by EDAX, ESEM, TGA, Raman and UV-vis-Nir spectroscopy. Covalent attachment of functional groups and molecules, including fluorine, methyl, n-butyl and n-hexyl groups, to the sidewalls of single wall carbon nanotubes has been achieved. Further fluorination study is done to …
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Prospective retarders for alkali-activated slag: stability at high alkalinity, effects on setting behavior and strength of paste
… in the high pH environment was assessed visually and also chemically through infrared spectroscopy. Compressive strength tests were conducted for the novel admixtures and the hardened product was analyzed through infrared spectroscopy. Additional tests such as zeta-potential measurements, …
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Fluorescence Labeling of Surface Species as an Efficient Tool for Detection, Identification and Quantification of Oxygen Containing Functionalities on Carbon Materials
… used to characterize CNTs, such as Raman spectroscopy, IR spectroscopy, UV-VIS-NIR spectroscopy, and X-ray photoelectron spectroscopy, provide selectivity in identification together with sensitivity in quantification. Fluorescence labeling of surface species (FLOSS) to identify and …
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Using single corn kernel classification, pooling, and simulation to address skewness and clustering in aflatoxin distribution
… kernel level. In Chapter 2, a custom-built UV-Vis-NIR spectroscopy system was built to scan single corn kernels in motion. A random forest model was trained to use the collected spectrum to classify aflatoxin level in single kernels with 86% sensitivity and 97% specificity, proving that our …
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Fundamental studies on copper zeolites for catalytic NO x abatement
… characterization tools like Ultra-Violet-Visible-Near Infra-red (UV-Vis-NIR) spectroscopy under ambient conditions, X-ray Absorption Near Edge structure (XANES) of Cu ions during standard SCR, Density Functional Theory (DFT) calculations, and titration of residual acid sites with amine …
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Elektropolymerisation, Spektroelektrochemie und Potentiometrie von funktionalisierten leitfähigen Polymeren
… mit spektroelektrochemischen Methoden: ESR-, UV-Vis-NIR- und FTIR-Spektroelektrochemie charakterisiert. Durch diese Methoden konnten während der elektrochemischen Oxidation von funktionalisierten leitfähigen Polymeren verschiedene Polymer- bzw. Copolymer-Ladungsträger nachgewiesen werden: …