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 20 of 36 for “"zinc sulfide"”.
-
Processing and characterization of zinc sulfide based materials
… submicron, spherical, and porous clusters of zinc sulfide (ZnS) nanocrystallites were used as a host material, into which gallium phosphide (GaP) was impregnated. A solution containing a phosphinogallane, (t-Bu)[subscript]2GaP(t-Bu)[subscript]2, and a vapor mixture of GaI and P[subscript]4 …
-
Alternating current electroluminescent properties of zinc sulfide powders
… current electroluminescent properties of zinc sulfide powders the following experiments were conducted: synthesis of zinc sulfide phosphors (comprised of zinc, sulfur and copper dopant); thermal shocking of phosphor materials (sudden cooling, using liquid nitrogen, of phosphor particles …
-
Kinetics of dissolution of zinc sulfide in aqueous sulfuric acid
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Metallurgy, 1962.
-
Application of the scattered-wave cluster method to zinc sulfide.
Thesis: M.S., Massachusetts Institute of Technology, Department of Metallurgy and Materials Science, 1972
-
Effects of High-Pressure on the Luminescence Properties of Zinc-Sulfide Phosphors
Made available in DSpace on 2014-12-13T18:55:36Z (GMT). No. of bitstreams: 1 7804028.pdf: 4857023 bytes, checksum: 283a4b12ff3f561f5fa3b1fa993caf4b (MD5) Previous issue date: 1977
-
Zinc polysulfides as precursors to zinc sulfide and as group transfer reagents
In the first part of the thesis, reactions of zinc powder with solutions of elemental sulfur in various donor solvents are described. Complexes of the type $\rm ZnS\sb6$(N-donor)$\sb2$ are obtained for the ligands tetramethylethylenediamine (TMEDA), N-methylimidazole (MeIm), and …
-
The Role of Sulfhydryl-Containing Low Molecular Weight Ligands for the Environmental Fate of Zinc Sulfide and Metallic Silver Nanoparticles
… composition and reactivity of nanoparticulate zinc sulfide and metallic silver. Zinc sulfide was used as a representative of nanoparticulate metal sulfide which occurs naturally in sulfidic environments. Metallic silver nanoparticles were also studied because of its wide use in consumer …
-
Spectral Conversion of Light Using Cadmium Selenium Zinc Sulfide Core Shell Quantum Dots to Increase the Efficiency of Photovoltaic Cells
Photovoltaics harness energy emitted from the sun. When the sun's energy is absorbed by a photovoltaic cell array, photons of light are converted into current. The amount of current produced by a photovoltaic cell is calculated by the difference between the energy of the incoming photon and the …
-
OPTICAL BISTABILITY IN ZINC-SULFIDE AND ZINC-SELENIDE THIN-FILM INTERFERENCE FILTERS AND IN GALLIUM-ARSENIDE AND COPPER-CHLORIDE ETALONS (NONLINEAR).
Two-photon optical bistability in commercial thin-film interference filters with ZnS and ZnSe spacers is observed with switching times ≳ 200 μs. The accompanying drifting of the bistability loop in time and laser-induced "damage" indicate a thermal mechanism. The problem of water vapor absorption …
-
Geomycology: fungal bioweathering, bioleaching, bioprecipitation and biotransformation of metals and minerals
… fungal roles in bioweathering and bioleaching of zinc sulfide ore, together with an investigation of the role of fungal phosphatases in the bioprecipitation of uranium and lead when utilising an organic phosphorus-containing substrate as the sole phosphorus source. The results obtained revealed …
-
Polymer Surface Modification With Plasma Reaction For Materials Integration
… surfaces were created by chemical reaction of zinc acetate with the freshly modified polymer. Zinc sulfide particles were formed within the polymer surface by reaction with hydrogen sulfide gas. Flourescence spectroscopy was used to verify the formation of zinc sulfide.
-
A Volumetric Determination of Zinc Involving a Quantitative Precipitation of Zinc Ammonium Phosphate
… of a precise method for the determination of zinc is evident after reading the report of the Sub-Committee on zinc Ore Analyses(3), which shows the wide discrepancies encountered in the determination of zinc by methods in ordinary use. Their report showed results from forty-two chemists …
-
Models of high-temperature desulfurization using zinc-based sorbents
… with experimental conversion histories of zinc oxide particle undergoing sulfidation using H2S at temperature in the range of 482 to 593 degree centigrade.;By using SEM (Scanning Electron Microscope) and Visilog(TM) imaging analysis software, the grain size distribution and grain sphericity …
-
An Improved Flexible Neutron Detector For Powder Diffraction Experiments
… on wavelength shifting fibers embedded in a zinc-sulfide lithium-fluoride based scintillator. The virtue of this design is that the detecting surface can be curved around the Debye-Scherrer rings. This virtue is lacking in other detector designs, making them more complex and poorer in …
-
Colloidal Semiconductor Nanocrystals: A Study of the Syntheses of and Capping Structures for CdSe
… (CdSe), though they can be made from cadmium-sulfide, cadmium-telluride or a number of other II-VI and III-V material combinations. The CdSe quantum dots emit visible light at a repeatable wavelength when excited by an ultraviolet source. The synthesis of colloidal quantum dot nanoparticles is …
-
Electroluminescence and inorganic phosphor science
… used mostly in the case of metal films).Zinc sulfide and cadmium zinc sulfide films with a thickness ranging between 70 and 400 nin have been prepared in an aqueous chemical bath, on optically smooth, silica, or silica based, substrates. The chemical bath contained zinc and cadmium …
-
Harmonic and Supercontinuum Generation in Zinc-Blende Materials
… and broad transparency window in the MIR, zinc-blende materials in their polycrystalline form are uniquely suitable for extremely broadband harmonic and supercontinuum generation. This dissertation reports on the development of numerical methods for simulating light-matter interactions in …
-
Analysis of an Antineutrino Detector
… through topology, and sheets of lithium-doped zinc sulfide to cleanly distinguish the neutron using pulse shape discrimination PSD. This dissertation talks about improvements made to the CHANDLER detector based on information gathered from its prototype, MiniCHANDLER, which saw a neutrino …
-
Perovskite interfaces with protective zinc compounds – DFT computation and related experiments
… nanocrystals and protective shells made of zinc compounds such as zinc sulfide and zinc phosphate. The results indicate that pure ZnS is unlikely to form stable bonds with the Pb-I terminated perovskite (100) surface at any orientation or termination. Therefore, the existence of the …
-
Detection of Antineutrinos at the North Anna Nuclear Generating Station
… a novel design using lithium-6 ($^6$Li) loaded zinc sulfide (ZnS) scintillator to tag neutron capture events, which significantly improves the IBD detection efficiency. The use of the Raghavan optical lattice brings enormous enhancement of light collection towards high energy resolution, which …
Page 1 of 2