Au(111) and Pt(111) surface phase behavior

Conference · Wed Jan 01 04:00:00 EST 1992

OSTI ID:7229405

Sandy, A R; Mochrie, S G.J. ^[1]; Zehner, D M ^[2]; Gruebel, G; Huang, K G; Gibbs, D ^[3]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Physics
2. Oak Ridge National Lab., TN (United States)
3. Brookhaven National Lab., Upton, NY (United States)

We describe our recent x-ray-scattering studies of the structure and phases of the clean Au(111) and Pt(111) surfaces. Below 0.65 of their respective bulk melting temperatures, the Au(111) surface has a well-ordered chevron reconstruction and the Pt(111) surface is unreconstructed. Above these temperatures, both surfaces reconstruct to form layers that are isotropically compressed and have only short-range order. Throughout their reconstructed phases, the densities of the Au and Pt (111) surfaces increase with increasing temperature.

• Research Organization: Oak Ridge National Lab., TN (United States); Massachusetts Inst. of Tech., Cambridge, MA (United States)
• Sponsoring Organization: DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400; AC02-76CH00016
• OSTI ID: 7229405
• Report Number(s): CONF-9210161-1; CONF-9210162--1; ON: DE92040881; CNN: DMR-9119675; DMR-9022933
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
COHERENT SCATTERING
DENSITY
DIFFRACTION
ELEMENTS
GOLD
METALS
PHASE STUDIES
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
SCATTERING
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
X-RAY DIFFRACTION