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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Some probable effects of reducing the gold content of the standard American dollar

Miller, Buford John January 2011 (has links)
Typescript, etc. / Digitized by Kansas State University Libraries
122

Synthesis and catalytic study of shell-shell, core-shell hollow gold nanocatalysts

Garlyyev, Batyr 27 May 2016 (has links)
Metal nanoparticles have a large surface area to volume ratio compared to their bulk counterparts, which makes them attractive to use as catalysts. Atoms on the surface of metal nanoparticles are very active due to their high surface energy resulting from their unsatisfied valency. First synthesis of gold nanoparticles with different shapes and bimetallic structure are explored in detail. Then an experimental method which could distinguish between the two mechanisms (homogeneous or heterogeneous) by using hollow plasmonic gold nanocatalyst is developed. Furthermore the catalytic activity of gold nanocages was changed by adding an inner platinum or palladium nanoshell. Results suggested that adding palladium inner shell increased the activity of gold nanocages towards the reduction nitro groups to amino groups. Controlling the selectivity of the catalyst is an important goal of catalysis research. Lastly selectivity of the plasmonic nanocatalyst (Gold sphere-Gold shell Nanorattles) with multiple plasmon modes was studied for photo-dimerization of nitro groups into azo dimers were studied on gold nanocatalyst surface. Results showed that selectivity can be controlled by changing the wavelength of the light exciting surface plasmon.
123

Photochemical, photophysical properties and structures of polynuclear gold(I) clusters and organometallic gold(I) complexes

肖紅, Xiao, Hong. January 1996 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
124

Structures and photoluminescence of polypyridine and cyclometallated complexes of Pt(II), Pd(II) and Au(III)

張子俊, Cheung, Tsz-chun. January 1997 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy
125

On the tribology of gold electrodeposits

Goodman, Simon John Nye January 1988 (has links)
No description available.
126

Studies of polyaromatic phosphines and their coordination to noble metals

Müller, Thomas Ernst January 1995 (has links)
No description available.
127

The colloid stability of gold particles dispersed on solid surfaces

Collins, Ian R. January 1989 (has links)
No description available.
128

Electrochemical leaching of gold-bearing arsenopyrite in alkaline cyanide solutions.

Sanchez-Corrales, Victor Manuel. January 1989 (has links)
Rest potential measurements, cyclic voltammetry, linear sweep voltammetry and constant potential coulometry were used to determine the electrochemical response of arsenopyrite in the absence and in the presence of cyanide and to determine its dissolution chemistry. Surface oxidation of arsenopyrite is proposed to proceed by a two-step reaction sequence. FeOOH, H₂AsO₃⁻, and Sᵒ, are produced in the initial step. Oxidation of Sᵒ to SO₄²⁻, and H₂AsO₃⁻ to HAsO₄²⁻ account for the second step. Coulometric results confirmed that 14 electrons are involved in the overall reaction. The implications of these results on the cyanidation of arsenical gold-bearing concentrates were also investigated. The response of four different concentrates to various cyanidation techniques was examined. Alkaline pressure oxidation in 1 M NaOH, at 200°C and under 500 psi of oxygen overpressure followed by conventional cyanidation resulted in 81% gold extraction from a concentrate that yielded only 2% gold extraction after direct cyanidation.
129

Some properties of thin metal films in reacting and non-reacting substrates

Al-Dabbagh, J. B. January 1989 (has links)
No description available.
130

Self-assembled monolayers : electronic properties at the interface

Price, Nicola Jane January 1995 (has links)
No description available.

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