Sn deposition on Ru(001) : a multitechnique surface science study

• Published in: Journal of physical chemistry (1952) 1993-01, Vol.97 (3), p.690-695
• Main Authors: PAFFETT, M. T, DAVID LOGAN, A, TAYLOR, T. N
• Format: Article
• Language: English
• Subjects: 360102 > Metals & Alloys-- Structure & Phase Studies; ALLOYS; ANNEALING; Applied sciences; AUGER ELECTRON SPECTROSCOPY; COHERENT SCATTERING; Condensed matter: structure, mechanical and thermal properties; DEPOSITION; DIFFRACTION; ELECTRON DIFFRACTION; ELECTRON SPECTROSCOPY; ELEMENTS; Exact sciences and technology; GROWTH; HEAT TREATMENTS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LAYERS; MATERIALS SCIENCE; METALS; Metals. Metallurgy; MILLER INDICES; MOLECULAR STRUCTURE; NUCLEATION; Physics; PLATINUM METALS; RUTHENIUM; SCATTERING; Solid surfaces and solid-solid interfaces; SPECTROSCOPY; Surface structure and topography; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); TIN; TRANSITION ELEMENTS 400201 > Chemical & Physicochemical Properties
• ISSN: 0022-3654; 1541-5740
• DOI: 10.1021/j100105a026

Tin deposition on the Ru(001) surface was studied by Auger electron spectroscopy (AES), low-energy electron diffraction (LEED), and low-energy ion scattering spectroscopy (LEISS). Tin deposition (AES signal intensity) versus time plots obtained over the substrate temperature (T[sub s]) range 330-670 K indicate that the Sn adatoms exhibit several different deposition growth modes. At T[sub s] = 330 K the Sn deposition follows a Stranski-Kranstanov growth mode (uniform monolayer followed by three-dimensional growth). Two LEED patterns are seen for T[sub s] = 330 K Sn depositions that are interpreted in terms of ordered Sn overlayers in the submonolayer coverage regime. For Sn depositions at T[sub s] = 500 K the Sn overlayer growth is also approximated by a Stranski-Kranstanov growth mode with the second and subsequent layers exhibiting less three-dimensional nucleation than at 330 K. For specific Sn depositions at T[sub s] > 600 K and upon annealing to 1,000 K, ordered surfaces with ([radical]3[times][radical]3)R30[degrees] and p(2[times]2) LEED patterns are obtained depending upon initial Sn precoverages and annealing temperatures and are suggested to arise from surface alloys. LEISS data indicate that the ([radical]3[times][radical]3)R30[degrees] surface alloy has a surface SnRu atom ratio of 2:1. 30 refs., 8 figs.