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 9 of 9 for “"gold-silver-copper"”.
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Trimetallic gold silver copper nanorods for carbon dioxide reduction
… The synthesis was adapted from a popular gold nanorods synthesis procedure where the modification would be replacing gold salts with copper salts. The formation of the rodlike shape was assisted by the presence of Ag ions with greater amounts of Ag forming higher aspect ratio nanorods, and …
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Critical heat flux enhancement via surface modification using colloidal dispersions of nanoparticles (Nanofluids)
… include chemically stable metals (e.g., gold, silver, copper), metal oxides (e.g., alumina, zirconia, silica, titania) and carbon in various forms (e.g., diamond, graphite, carbon nanotubes). The attractive properties of nanofluids include higher thermal conductivity, heat transfer …
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Bayesian regional models of gold and copper alloys from pre-Hispanic Colombia
… metallurgical technologies. Alloys of gold, silver, copper, and platinum were used in the creation of a wide range of artefacts intended for personal ornamentation, ceremonial use, funerary goods, functional tools, and votive offerings. While our understanding of the region’s societies …
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The influence of mine waste contamination on invertebrates and fish in the Methow River Valley, Okanogan County, Washington (U.S.A.)
… fish. Ore deposits in the area were mined for gold, silver, copper and zinc until the early 1950's, but the mines are now inactive. The trace elements arsenic (As), cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) were the focus of this study.The objectives of this study were to determine, …
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Refractory oxides based multilayered core@shell plasmonic nanostructures
… plasmonic materials beyond the noble metals (gold, silver, copper, and aluminium) to include refractory materials such as metal nitrides, silides, germanides and many other compounds and 2D materials such as graphene, alternative plasmonic materials with optical properties comparable to noble …
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Buffalo Canyon: An Oligocene Greisen-Like Intrusion-Related Gold Deposit in the Union Mining District, Nye County, Nevada
Reduced intrusion-related gold (RIRG) deposits have been documented around the globe, and have been best studied in Alaska and Yukon, but few examples have been documented in Nevada. One occurrence in Nevada is the Jurassic Bald Mountain deposit in eastern Nevada; however, for most Nevada …
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Syntheses and transformations of multimetallic nanoparticles
Multimetallic nanoparticles have had increased interest in recent years. In this thesis, we analyze Au, Ag, and Cu nanoparticles and multimetallic nanoparticles containing these three coinage metals. The incorporation of two or more metals together within nanoparticles allows for synergistic …
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Exploration of the thiosulphate process for the dissolution of gold from electronic waste and its recovery through ion-exchange
… The value is attributed to the metals such as gold, silver, copper and palladium found in e-waste. Printed circuit boards (PCBs) are a small but nonetheless crucial fraction of global e-waste making up 6% by mass. The gold content in this small fraction is of much higher concentrations than in …
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Coinage Metal Chalcogenide Clusters with N-Heterocyclic Carbene Ancillary Ligands
This thesis describes the synthesis and characterization of homo- and heterometallic group 11 – group 16 clusters with N-heterocyclic carbene (NHC) ligands. The clusters were prepared from reactive group 11 trimethylsilylchalcogenolate reagents (NHC-M-ESiMe3; M = Cu, Au; E = S, Se, Te) by silane …