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 12 of 12 for “"timeresolved"”.
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Computational imaging with small numbers of photons
… remote sensing. Conventionally, even with timeresolved detectors that are sensitive to individual photons, obtaining accurate images requires hundreds of photon detections at each pixel to mitigate the shot noise inherent in photon-counting optical sensors. In this thesis, we develop …
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Lanthanide complexes of phthalimide and phthalamate containing ligands: synthesis, photophysical properties and their potential applications
… probe emission and background fluorescence using timeresolved techniques. Unfortunately the free ions themselves absorb light poorly so cannot provide the sensitivity often required of a probe or a sensor. Their performance however can be improved dramatically by the coordination of the metal ions …
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Applications of pump-probe and two-photon techniques in time-resolved fluorescence miscroscopy and spectroscopy
… aqueous rhodamine B are presented. Furthermore, timeresolved, microscopic images deomonstrate this technique's capabilities in obtaining lifetimes and time-resolved polarization information of fluorescent molecules in mouse fibroblast (STO) cells. Two-photon fluorescence microscopy has proven to …
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Applications of neutron radiography & tomography
… properties make Neutrograph ideal for obtaining timeresolved measurements of dynamic processes in both two and three dimensions, and for imaging relatively thick samples or highly attenuating materials on a reasonable time-scale. One aspect that is addressed in this research is the potential …
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Engineering the optical properties of luminescent solar concentrators at the molecular scale
… crystalline tetracene (Tc) and rubrene (Rb). A timeresolved imaging technique that maps the triplet distribution showed that optical waveguiding dominates over diffusion and can transport energy several micrometers at the high excitation rates commonly used to probe the exciton diffusion …
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Ultrafast Optical Spectroscopy Techniques applied to colloidal nanocrystals
… I will describe my experimental work based on timeresolved photoluminescence spectroscopy applied to CdSe=CdS core=shell nanocrystals. These nanocrystals are a reference nanocrystals and their optical properties are extensively investigated, however, some aspects are not fully understood, for …
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Non-invasive optical monitoring of free and bound oxygen in humans
… and skin were studied, and continuous-wave and timeresolved near-infrared spectroscopy were compared (II) in healthy volunteers subjected to various defined regional physiological perturbations. For the first time, gas in scattering media absorption spectroscopy (GASMAS) was used to detect …
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Apertureless Scanning Nearfield Optical Microscopy with Ultra-high Temporal Resolution
… and modifying certain aspects, the detection of timeresolved nearfield signals seems feasible. Some ideas for possible modifications to the ppaSNOM, such as an increase in collection efficiency of the objective or the replacement of the dielectric AFM tip by a metallic tip, are given in the end. …
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Redox kinetics study for chemical-looping combustion, water and CO₂ splitting using nickel and cerium-based oxygen carrier
… reactor with an on-line mass spectrometer. The timeresolved kinetics are modeled with consideration of thermodynamics, surface chemistry, transport mechanism, and structural evolution. Our approach, combining well-controlled experiment and detailed kinetics modeling, enables a new methodology …
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Ultraschnelle zeitaufgelöste Absorptionsspektroskopie im weichen Röntgenbereich
Bis in die 50er Jahren wurden ausschließliche Röntgenröhren in der Röntgenspektroskopie benutzt. (Parratt, 1938). In den 50er Jahren wurden die ersten Synchrotrons gebaut und für die Spektroskopie im Röntgenbereich angewendet. (Blocker et al., 1950). Die auch noch heute verwendeten Techniken wurden …
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Computations of bubble dynamics with heat transfer
… flow behavior, and to study the dependance of timeresolved surface temperature distribution on bubble dynamics are produced. In order to investigate the suitability of a two-fluid flow model when the fluid interface is in contact with a surface, simulations are carried out with three contact …
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Coherent Control of Molecular Dynamics with Shaped Femtosecond Pulses
… and a conical intersection in particular. First timeresolved experiments have been presented.