Direct observation of gold valence change as a function of oxygen stoichiometry in

Eibschutz, M.; Lines, M.E.; Reiff, W.M.; van Dover, B.; Waszczak, J.V.; Zahurak, S.; Felder, R.J.
April 1993
Applied Physics Letters;4/12/1993, Vol. 62 Issue 15, p1827
Academic Journal
Examines the gold valence change as a function of oxygen stoichiometry in YBa[sub 2]Cau[sub 3]O[sub 7-delta]. Identification of separate Mossbauer features; Precipitation of gold ions as particles upon reduction; Existence of gold cation with uniquely oxygen coordination.


Related Articles

  • The d [sup 1]Π[sub g](v=1) Rydberg state of O[sub 2]: Optical-optical double-resonance and Huggins-band ozone-photolysis, resonance-enhanced multiphoton-ionization studies with a b [sup 1]Σ[sub g][sup +](v=0)-state platform. O’Keeffe, P.; Ridley, T.; Sheard, H. A.; Lawley, K. P.; Donovan, R. J.; Lewis, B. R. // Journal of Chemical Physics;11/15/2002, Vol. 117 Issue 19, p8705 

    Resonance-enhanced multiphoton-ionization spectra are presented of the d[SUB1]Π[SUPg]b←←[SUP1]Σ[SUP +,SUB g](1,0) transition of O[SUB2], the b(v=0) state generated both by photolysis of O[SUB3] in the Huggins bands and also by direct excitation of single J levels in an...

  • A MULTIFRACTAL DETRENDED FLUCTUATION ANALYSIS OF GOLD PRICE FLUCTUATIONS. Bolgorian, Meysam; Gharli, Zahra // Acta Physica Polonica B;Jan2011, Vol. 42 Issue 1, p159 

    It is a well-established fact that gold has many economic functions including hedging against inflation and providing economic and physical safety. For this it is very important to know the nature of fluctuations in gold prices. In this paper, applying the Multifractal Detrended Fluctuation...

  • Oxygen vacancy formation energy in Pd-doped ceria: A DFT+U study. Zongxian Yang; Gaixia Luo; Zhansheng Lu; Hermansson, Kersti // Journal of Chemical Physics;8/21/2007, Vol. 127 Issue 7, p074704 

    Using the DFT+U method, i.e., first principles density functional theory calculations with the inclusion of on-site Coulomb interaction, the effects of Pd doping on the O vacancy formation energy (Evac) in CeO2 has been studied. We find that Evac is lowered from 3.0 eV in undoped ceria to 0.6 eV...

  • Effects of Al addition on the native defects in hafnia. Li, Quan; Koo, K. M.; Lau, W. M.; Lee, P. F.; Dai, J. Y.; Hou, Z. F.; Gong, X. G. // Applied Physics Letters;5/1/2006, Vol. 88 Issue 18, p182903 

    Two occupied native defect bands are experimentally detected in pure HfO2. The density of states of band one in the middle of the band gap reduces drastically with the Al addition, while that of band two slightly above the valence-band maximum remains rather unaffected. We attribute the two...

  • Observation of lines above 2000 Ã… in O VIII and C VI in the Princeton Large Torus due to charge-exchange processes: Diagnostic applications. Suckewer, S.; Skinner, C. H.; Stratton, B.; Bell, R.; Cavallo, A.; Hosea, J.; Hwang, D.; Schilling, G. // Applied Physics Letters;1984, Vol. 45 Issue 3, p236 

    Hydrogenlike oxygen and carbon lines from transitions (Δn=1) between levels of high principal quantum number n, with wavelengths above 2000 Å have been observed. Observations of such transitions were possible due to charge-exchange processes during neutral beam injection of hydrogen...

  • Identification of valence shifts in Au during the water-gas shift reaction. Hammer, Nina; Kvande, Ingvar; Beek, Wouter; Chen, De; Rønning, Magnus // Topics in Catalysis;Nov2007, Vol. 45 Issue 1-4, p25 

    In situ X-ray absorption spectroscopy (XAS) has been performed to investigate the active site on Au-based catalysts in the water-gas shift (WGS) reaction. The surface area and hence the WGS activity is higher for AuTiO2 catalysts supported on carbon nanofibres (CNF) than TiO2. The WGS reaction...

  • Crystallographic orientation dependence of compositional transition and valence band offset at SiO2/Si interface formed using oxygen radicals. Suwa, T.; Teramoto, A.; Kumagai, Y.; Abe, K.; Li, X.; Nakao, Y.; Yamamoto, M.; Kato, Y.; Muro, T.; Kinoshita, T.; Ohmi, T.; Hattori, T. // Applied Physics Letters;4/26/2010, Vol. 96 Issue 17, p173103 

    The chemical and electronic-band structures of SiO2/Si interfaces formed utilizing oxygen radicals were investigated by measuring angle-resolved photoelectron spectra arising from Si 2p and O 1s core levels and a valence band with the same probing depth. We clarified that (1) the SiO2/Si...

  • Defect energy levels in HfO2 high-dielectric-constant gate oxide. Xiong, K.; Robertson, J.; Gibson, M. C.; Clark, S. J. // Applied Physics Letters;10/31/2005, Vol. 87 Issue 18, p183505 

    This letter presents calculations of the energy levels of the oxygen vacancy and oxygen interstitial defects in HfO2 using density functional methods that do not need an empirical band gap correction. The levels are aligned to those of the Si channel using the known band offsets. The oxygen...

  • Spatially selective and reversible doping control in cuprate films. Oh, Seongshik; Bonetti, Joseph A.; Inderhees, Kevin; Van Harlingen, D. J.; Eckstein, J. N. // Applied Physics Letters;12/5/2005, Vol. 87 Issue 23, p231911 

    We describe a reversible, spatially controlled doping method for cuprate films. The technique has been used to create superconductor-antiferromagnetic insulator-superconductor (S-AFI-S) junctions and optimally doped superconductor-underdoped superconductor-optimally doped superconductor cuprate...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics