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 8 of 8 for “"gold-copper"”.
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Effective tuning of bimetallic composition of gold-copper nanomolecules and the emergence of plasmon-like feature in optical spectra
… ESI-MS to atomic precision. A maximum of 23 copper atoms replace the gold atoms; when the number of copper atoms is higher than eight, a surface plasmon-like peak appears at ∼520 nm. Based on the fundamental, elemental properties of Au and Cu, we predict a mixed atomic ordering and …
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Film formation on precious metal surfaces in the presence of epoxy resins
… parts epoxy. The metals investigated were pure gold, silver, and copper; gold-copper alloys; gold-silver alloys; and electroformed gold-copper alloys. The alloys ranged in composition from 75 to 92 per cent gold. These samples were cleaned, weighed, placed in individual, covered, glass …
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Integrated electronic waste management in Mexico : law, technology and public policy
… some of the most important health wise and the gold, copper, aluminum, nickel, silver and palladium they contain. These contents also offer incentives for their collection and recovery. They need to be diverted from the waste stream reaching the sanitary landfills and in some instances …
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Experimentally validated 3D MD model for AFM-based tip-based nanomanufacturing
… properties at the nanoscale (e.g. hardness of gold predicted within 6% error). On the other hand, a comprehensive experimental parametric study was conducted to produce a database that is used to select proper machining conditions for guiding the fabrication of nanochannels (e.g. scratch rate = …
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Remote sensing analyses for open pit mine area computation. A comparative study on the implementation of multi-spectral classifications and crowdsourcing to compute the spatial extent of four open-pit mines in Indonesia, Australia, Canada and Brazil
… synthetic aperture radar imagery. Four copper or iron ore open-pit mines in Indonesia (Grasberg-Ertsberg Gold Copper Mine), Australia (Hamersley Iron Ore Mines), Canada (Highland Valley Copper Mine) and Brazil (Mariana Iron Ore Complex) constitute the study sites. Index-based, …
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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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The steady-state work density gradient: A new parameter and strategies for characterizing crack propagation in thin ductile sheets
… the aforementioned aluminum sheets, 120 nm thick gold sheets, thin tin sheets, and thin copper sheets. The dissertation also explores other fracture toughness approaches such as the linear-elastic K parameter, the elastic-plastic J concept, and essential work of fracture (EWF) to give context to …
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Structural and electronic properties of noble metals on metal oxide surfaces
Noble metals on metal oxide surfaces play crucial roles in many catalysis applications. Due to extreme complexity of the interfaces and catalytic reaction processes, basic science studies of model systems are needed to guide the construction and optimization of new industrial catalysts. We have …