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 17 of 17 for “"distance dependence"”.
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Enhanced Raman spectroscopy at dielectric interfaces
… from chemical passivation, scanning Auger, and distance dependence experiments, as well as comparing enhanced Raman scattering signals obtained from coated and uncoated Au island films. The dependence of the scattering on the excitation angle on incidence can be interpreted in terms of the …
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Guided -Mode Resonance in Planar Photonic Crystals: Application to Sensing
… by over two orders of magnitude. The distance dependence of the enhanced excitation effect is studied and provides clarification for its mechanism and suggests that the PC can be modified to accommodate a wide range of analyte sizes. Finally the enhanced extraction effect is studied in …
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Non-equilibrium fluctuation induced-phenomena in quantum electrodynamics
… them. We apply our results to explore the dependence of these phenomena on size and material properties of cylinders. While the scattering formalism is very general and technically can be employed for arbitrary shapes, in practice it is very time-consuming to apply it to the most …
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Investigating Cholesterol Orientation in Lipid Bilayer by Raman Spectroscopy
… Raman scattering signals with a molecular scale distance dependence from the gold surface. The gold nanorods used for this project were tuned to an excitation laser wavelength of 785 nm. From previous lipid membrane studies, dioleoylphosphatidylcholine (DOPC) was demonstrated to have a well …
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Modeling spatial covariance functions
… as it provides important information about the dependence structure of underlying processes and determines performance of spatial prediction. Various parametric models have been developed to accommodate the idiosyncratic features of a given dataset. However, the parametric models may impose …
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Microfabrication of surface electrode ion traps for quantum manipulation
… traps to study the temperature and frequency dependence of the ion heating. We use aluminum traps to study the ion heating dependence on the amorphous dielectric layer. And we use silver traps to study the ion heating dependence on the grain structure. These results suggest that excess ion …
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Multiphase, Multicomponent Systems: Divalent Ionic Surfactant Phases and Single-Particle Engineering of Protein and Polymer Glasses
… this technique was be used to determine the distance dependence of protein-protein interactions in the range of 2-25 Å, providing the first calculation of the hydration pressure decay length for globular proteins. The distance-dependence of the interaction potential at distances less …
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Investigations of nonlocal transport and current noise in mesoscopic normal metal-superconductor hybrid structures
… to the superconducting coherence length. At such distances coherent nonlocal subgap transport takes place. It involves Cooper pair splitting among other theoretically predicted transport processes. In this dissertation we investigate signatures of coherence in nonlocal transport. We focus on …
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Fluorescence Resonance Energy Transfer (FRET) systems for biomedical sensor applications
… is also used for enhanced optical bioassays. The distance dependence of the FRET interaction enables the technique to be used as a molecular ruler to report, for example, on conformational changes in biomolecules. The �rst phase of this work involved the design and implementation of a model 2-D …
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Fundamentals of Excess Electron Transport in Biologically Relevant Systems
… sequence and conformation. The conformational dependence was used to study the kinetic versus thermodynamic control of thymine dimer accumulation in natural systems. In this system, no difference was observed in the accumulation of thymine dimer in free vs. constrained DNA. Therefore, the …
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Fruit to Sapling: an Ontogenetically Integrated Study of Tree Recruitment in an Amazonian Rainforest
… that seed fall decreases sharply with increasing distance from fruiting trees, with disproportionately large contributions from a very small fraction of all trees. Patterns of seed fall, although idiosyncratic for individual species, tended to relate to dispersal syndrome. Intact seeds were found …
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The Bio-Nano Interface: Investigating the Roles of Nanoparticle Morphology, Microstructure, Optoelectronic Properties, and Surface Chemistry for Biological Applications
… this modification can be used to probe distance dependence in BRET and to test magnetic behavior in NPs. I also employed these FeCr/SiO2 and FeNi/SiO2 NPs for magnetically and reversibly separating small fragments of DNA from solution. Both the FeCr/SiO2 and FeNi/SiO¬2 NPs showed good …
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Modelling and Measurement of the Scatter of Microwaves by Buildings
… characteristics in terms of angular and distance dependence of the scattering coefficient using the expansions of the Fresnel integral with appropriate approximations. The effects of building features and surface variations, e.g. protruding and recessed features, windows and surface …
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Toward spatial control of gold nanorod surface functionalization
… have been shown to increase with strong distance-dependence. Here, a dual approach for the conjugation of a TPA chromophore to GNRs is presented, relying on layer-by- layer (LbL) polymer wrapping and direct thiol coating of the same parent chromophore structure. Together, these approaches …
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Ruthenium polypyridyl complexes with long aliphatic chains; photophysics, interfacial assembly and cell imaging
… electrochemistry of these complexes. The solvent dependence of the luminescence properties is also addressed along with the formation of bilayer vesicles of these compounds in aqueous conditions. In chapter 4 self assembled monolayers of the Ru(dpp)2(x-ATAP)](PF6)2 complexes were formed on …
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Structural and plasmonic properties of gold nanocrystals
… relative to the plasmon resonance as well as the distance of the reporter molecules from the nanoparticles’ surface. For suspension based measurements, additional considerations must also be made regarding absorption and scattering effects as light propagates through the sample. These effects are …
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Novel molecular engineering approaches for genotyping and DNA sequencing
… at 667 nm was observed. We have demonstrated the distance dependence of FRET, with the finding that the target with 16 base separation between the QD and Cy5 after probe hybridization gave the most efficient FRET. Further studies are in progress to evaluate the effectiveness of this QD-based probe …