Monolayer-confined mixing at the Ag-Pt(111) interface

The present tunneling microscopy study reveals that the growth of silver on Pt(III) at substrate temperatures < 620K results in the formation of a two-dimensional alloy consisting of Ag clusters dissolved in the Pt layer [ Theta sub Ag < 0.5 monolayer (ML)] and Pt clusters in the Ag matrix lay...

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Bibliographic Details
Published in:Physical review letters 1993-09, Vol.71 (13), p.2086-2089
Main Authors: RÖDER, H, SCHUSTER, R, BRUNE, H, KERN, K
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Diffusion
interface formation
Electron, ion, and scanning probe microscopy
Exact sciences and technology
Metals. Metallurgy
Physics
Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc
Solid surfaces and solid-solid interfaces
Structure and morphology
thickness
Structure of solids and liquids
crystallography
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thin film structure and morphology
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Summary:The present tunneling microscopy study reveals that the growth of silver on Pt(III) at substrate temperatures < 620K results in the formation of a two-dimensional alloy consisting of Ag clusters dissolved in the Pt layer [ Theta sub Ag < 0.5 monolayer (ML)] and Pt clusters in the Ag matrix layer (0.5 ML < Theta sub Ag < 1 ML), respectively. The embedded clusters have a narrow size distribution centered around 10 A. The dissolution of silver into the Pt surface layer and vice versa proceeds from the step edges and is confined to the topmost layer. The second silver layer does not dissolve into the interface, but grows layerwise on top.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.71.2086