Surface chemical analysis of Au-Cu alloys with N(E) curve of AES.

Surface Analysis and Structures Spherical Crystals of Very Clean Au, Cu and Au-Cu Alloys Grown from a Drop of Melt

Surface impurities on spherical Au and Cu crystals grown from a drop of melt on graphite in UHV were analyzed by Auger electron spectroscopy after the metals had been cleaned by melting resp. roasting in air. Crystals of Au-Cu alloys grown by the same technique show enrichment of the less abundant component. The well known reconstructions Au(001)(5x20) and Au(l 1 l)(23x 1) could not be detected...

Au-Ag-Cu nano-alloys: tailoring of permittivity

Precious metal alloys enables new possibilities to tailor materials for specific optical functions. Here we present a systematic study of the effects of a nanoscale alloying on the permittivity of Au-Ag-Cu metals at 38 different atomic mixing ratios. The permittivity was measured and analyzed numerically by applying the Drude model. X-ray diffraction (XRD) revealed the face centered cubic latti...

Surface segregation phenomena in extended and nanoparticle surfaces of Cu-Au alloys

a Department of Physics, Applied Physics and Astronomy, State University of New York, Binghamton, NY 13902, USA b Materials Science and Engineering Program, State University of New York, Binghamton, NY 13902, USA c Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA d Department of Mechanical Engineering, State University of New York, ...

(100) surface segregation in Cu-Ni alloys.

Interaction of atomic hydrogen with monometallic Au(100), Cu(100), Pt(100) surfaces and surface of bimetallic Au@Cu(100), Au@Pt(100) overlayer systems: The role of magnetism

The spin-polarized calculations in generalized gradient approximation density–functional theory (GGA–DFT) have been used to show how the existence of second metals can modify the atomic hydrogen adsorption on Au (100), Cu (100), and Pt (100) surfaces. The computed adsorption energies for the atomic hydrogen adsorbed at the surface coverage of 0.125 ML (monolayer) for the monometallic Au (100), ...