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.
Results
Showing 1 to 10 of 10 for “"absorption and emission spectroscopy"”.
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Synthesis and charaterisation of phosphorescent copper (I) complexes for light emitting devices
… which emit from the triplet excited state and exhibit bright phosphorescence. Efficient in devices have been reported using these luminescent materials, such as iridium and platinum complexes, however, rare metal abundance concerns, high price and toxicology have inspired the study of …
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Photophysics of Phenylene Vinylene Polymers and Oligomers: The Influence of Nanocrystalline Domains
This study looks at the nature of excited states and their photodynamics in phenylene vinylene molecules. Poly-p-(phenylene vinylene) (PPV), poly[(2-methoxy-5-hexyloxy-p-phenylene)vinylene] (MH-PPV), and 1,4-distyrylbenzene (DSB), a small molecule analog of PPV, are studied using various …
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Dynamik der Schichtabscheidung von Keramiken mit KrF-Excimer-Laserstrahlung
… during pulsed laser deposition of Al2O3, BaTiO3 and ZrO2 is investigated. The expansion of the laser induced plasma is analytically described as a function of the processing variables and material parameters, considering elastic or inelastic collisions between the ablated particles and the …
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An improved understanding of fluorescent Zn(II) sensors and their uses in biological settings
… 1. An Introduction to Fluorescent Zn(II) Sensors and Their Applications in Biological Systems This chapter opens with an overview of the numerous roles of zinc in biology, with an emphasis on labile Zn(II), that is, loosely bound or kinetically available stores of the ion. The synthesis, …
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Novel Luminescent Lanthanide Complexes as Reporters of Cellular Oxidative Stress
… based on asymmetrically substituted cyclen ligands were designed and synthesised in this project in order to develop ROS-responsive luminescent molecular sensors. A synthetic strategy involving the synthesis of an intermediate ligand was applied to the asymmetrically functionalisation of the …
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Semiconductor nanocrystal colloids : manganese doped cadmium selenide, (core)shell composites for biological labeling, and highly fluorescent cadmium telluride
This thesis describes the characterization and applications of nanometer sized semiconductor (or quantum dot) colloids produced by chemical means. The nanocrystals are synthesized by pyrolysis of organometallic precursors in the coordinating solvent trioctylphosphine oxide (TOPO). The important …
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Understanding and Exploiting Anion Redox Process for High Energy Density Positive Electrode Materials for Li-ion Batteries
… opportunity by providing reasonable cycle life and energy density. It was widely assumed that Li-ion battery positive electrode materials, Li transition metal oxides, store charges through the redox activity of transition metal species, accompanied by the intercalation and deintercalation of …
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Single molecule optical absorption at room temperature detected by scanning tunneling microscopy
… or semi-conductive surfaces. By adding laser absorption, we are able to simultaneously examine single molecules with high spatial and high energy resolution. Our method of single molecule absorption detected by scanning tunneling microscopy (SMA-STM) relies on backside illumination to cut down …
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Novel Iridium (III) complexes for photocatalytic H2 generation from H2O using sunlight
The design and synthesis of economically viable homogeneous and heterogeneous transition metal complexes for photocatalytic hydrogen generation using visible light irradiation and as OLED’s are under intense investigation. Transition metal complexes are drawing great interest as they offer highly …
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Exploring the Optical and Redox Properties of π-Conjugated Boron Difluoride Formazanate Dyes
… the synthesis of π-conjugated small molecules and polymers consisting of boron difluoride (BF2) formazanate dyes. It utilizes different strategies such as extended π-conjugation, planarity of the backbone, donor-acceptor interactions, etc. to modulate the frontier molecular orbitals and band …