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 “"band shifts"”.
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Long-Period Gratings as Immuno-Diagnostic biosensors
… to imperfections in the cladding surface, loss bands are seen in the transmission spectrum corresponding to the coupled wavelengths. Based on the phase-matching condition between the coupling and coupled modes, the loss bands shift with changes in the refractive index of the surrounding medium. …
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Molecular oxygen adsorbates at a Au/Ni(111) surface alloy and their role in catalytic CO oxidation at 70 - 250 K
… and arises from poorer overlap between the Ni d-band and the 02 LUMO as the Ni d-band shifts to lower energy with increasing Au content of the Au/Ni surface alloy. The amount of molecular adsorption as a function of Au coverage cannot be described by an analytical or simulated model based on Au …
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Isotopic labelling applied to the infrared spectra of metal complexes
… are discussed in relation to the band shifts induced by ¹⁵N-labelling and deuteration of the pyridine ring and by metal ion substitution. ¹⁵N-Labelling aids in establishing the pyridine ring vibrations, while deuteration and metal substitution are more useful in assigning the νM-L …
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Temperature Dependent Behavior of Optical Loss from Hydrogen Species in Optical Fibers at High Temperature
… was exposed to hydrogen at 800 °C two absorption bands appeared: ~1390 nm assigned to the first overtone of the hydroxyl stretch and ~2200 nm band with complex assignments including the combination mode of the fundamental hydroxyl stretch with SiO4 tetrahedral vibrations and the combination mode …
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Near infrared transient absorption spectra of photolyzed myoglobin at low temperatures
… to thirty seconds. We see an absorption band near 758 nm which is known as band VIII. Three microseconds after photolysis at 60K, the center of band VIII is 766 nm, red-shifted from the peak seen in deoxy myoglobin at this temperature. Band VIII shifts with time towards the deoxy value …
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Proton Acceptor-Proton Donor Interactions in Gases and Low Temperature Matrices
… spectrum of the fundamental HC1 band as a function of interactions with other components of the mixture, and secondly bands associated with specific interactions forming hydrogen-bonded complexes.<br/><br/>The enhancement of HC1 is generally found to vary linearly with the …
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Effects of non-planar distortions in porphyrin compounds on their properties and functionality
… optical properties, the view that the large red shifts seen in the optical absorption bands of peripherally crowded nonplanar porphyrins are the result of nonplanar deformations of the macrocycle had been challenged in the literature by studies suggesting that the shifts arise from …
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Study of the ligand effects on the metal-ligand bond in some new organometallic complexes using FT-Raman and -IR spectroscopy, isotopic substitution and density functional theory techniques
… results. Indeed, the analysis of the band shifts in the FT-Raman and –IR spectra of the isotopomer mer-[W(CO)3(dmpe)(h2-S=CD2)] confirmed our assignment. The different stereoisomers of complex mer-[W(CO)3(dmpe)(h2-S=CH2)] were investigated too, since RMN and IR-data have shown that …
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Raman microscopic studies of PVD deposited hard ceramic coatings.
… which gave rise to two pronounced groups of bands related to the acoustical (150-300cm[-1]) and optical (400-750cm[-1]) parts of the phonon spectrum. Evidence was gathered to support the theory that the optic modes were mainly due to the vibrations of the lighter elements and the acoustic …
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Multimodal Polyethylene-Graphene Nanocomposite via Melt Extrusion
… of the nanocomposite, stress-induced Raman band shifts, mechanical, and thermal expansion testing, showed strong interfacial bonding between the graphene sheets and polymer matrix. X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy revealed that in the presence of …