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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 20 of 521 for “"Luminescence"”.
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Luminescence in ZnO
As a wide band semiconductor with a large binding energy (about 60meV), ZnO is a promising candidate semiconductor material for the next generation of optoelectronic , light emission or high power and high frequency devices. In order to make electrical device from ZnO, it is necessary to …
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High-Pressure Luminescence Studies
Made available in DSpace on 2014-12-13T20:10:12Z (GMT). No. of bitstreams: 1 7804027.pdf: 4456002 bytes, checksum: 3a6efb38956655ca09904d8774d44226 (MD5) Previous issue date: 1977
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Luminescence-Based MicroRNA Detection Methods
… detection methods are presented which utilize luminescence-based methods. Three employ Renilla luciferase, a bioluminescent protein, and one is based on fluorescence. The presented methods are capable of detecting miRNA from the picomole (nanomolar) level down to the femtomole (picomolar) …
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Recombination Luminescence in Irradiated Silicon
Submitted by Yan Wang (yanwang3@illinois.edu) on 2010-06-24T22:51:52Z No. of bitstreams: 1 1967_spry.pdf: 3669717 bytes, checksum: 2902addd3a0bad595e749cc994305e5a (MD5)
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Nonlinear Luminescence Quenching in Eu2O3
Nonlinear luminescence quenching has been documented in numerous systems such as organic crystals, rare earth insulators, laser materials, semiconductors, and phosphors. In each of these systems nonlinear luminescence quenching occurs under conditions of high excitation density from interactions …
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Lanthanide luminescence in Pybox functionalized metallopolymers
Lanthanide luminescence is woven into the fabric of modern day existence. Due to their narrow emission and useful red and green emission Eu(III) and Tb(III) have been extensively studied and applied as phosphors in a number of devices. It is in the pursuit of ever improving these devices' emission …
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Upconversion luminescence in Er-codoped NaYF4 nanoparticles
… electronic states involved in different luminescence upconversion photophysics as well as the role of phonon coupling. The collective work aims to explore a detailed understanding of the upconversion mechanism in nanoscaled NaYF4 based materials co-doped with several lanthanides, e.g. …
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Ballistic electrons : microscopy, spectroscopy, devices and luminescence
This thesis describes research to theoretically model and experimentally measure electronic systems which employ ballistic electron emission. First, a Monte-Carlo framework for simulating electron injection from a tunnel junction emitter into a semiconductor collector is presented in detail and a …
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Luminescence Dating of Medieval and Early Modern Brickwork
… dating technique of optically stimulated luminescence in order to derive absolute dates for important medieval brick sites in Essex. This in turn would allow this framework of understanding surrounding medieval brick to be critically examined and revised where necessary. A series of …
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Luminescence of Impurity-Activated Alkali-Halides Under High Pressure
Made available in DSpace on 2015-05-13T15:21:56Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7606750.PDF: 9580470 bytes, checksum: b7a638dd0f5a53b78dbd9617504ee389 (MD5) Previous issue date: 1975
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Luminescence of impurity-activated alkali halides under high pressure
The effects of high pressure on the luminescence from Tl -, In -, and Ga+ -doped alkali halide phosphors excited in the A-absorption band were studied at room temperature for a number of materials in both the fcc and sc crystal structures. An emission spectrometer was constructed for use in the …
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Energy transfer and luminescence enhancement in Er-doped silicon
… of Si:Er excitation/de-excitation mechanisms and luminescence enchancement is presented in this thesis. A model based on impurity Auger and nonradiative nmltiphonon transitions (NRl\·IPT) is shown to describe the temperature quenching of the photoluminescence (PL) intensity from 4K to 300K This …
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An electron microprobe study of luminescence centers in cassiterite
… microprobe equipped with a device for making luminescence measurements has been used to determine the concentration of luminescence activators in zoned cassiterites of hydrothermal origin. Micron-scale growth zones contain variable amounts of Ti, Fe, W and other impurities. The impurity ions …
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Mutant analysis of luminescence and autoinduction in a marine bacterium
… the "autoinducer". The mechanistic bases of both luminescence and autoinduction are well known in V. fischeri, but this knowledge is mostly derived from studies of the cloned luminescence and autoinduction genes expressed in Escherichia coli. In this study, luminescence and autoinduction mutations …
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Use of luminescence energy transfer probes to detect genetic variants.
The purpose of this research was to study the hybridization of molecular beacons under different conditions and designs. Data collected suggest that the inconsistency found in the emission intensity of several of these probes may be caused by 3 important factors: length of the probe, nucleotide …
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