-, Govind and Wenhua, Chen and Wang, Hao and Madey, Theodore E. (2010) Growth of oxygen-induced nanoscale-pyramidal facets on Rh(210) surface. Physical Review B, 81 (8). 085415-1. ISSN 1550-235X

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Oxygen-induced nanometer scale faceting of the atomically rough Rh(210) surface has been studied using Auger electron spectroscopy, low energy electron diffraction (LEED), and scanning tunneling microscopy (STM). When the Rh(210) surface is annealed at temperature ≥550 K in oxygen (pressure ≥2×10−8 Torr), it becomes completely covered with nanometer-scale facets. LEED studies reveal that the faceted surface is characterized by three-sided nanoscale pyramids exposing one reconstructed (110) and two {731} faces on each pyramid. STM measurements confirm the LEED results and show that the average facet size ranges from 12 to 21nm when changing annealing temperature from 800 to 1600 K. Moreover, atomically resolved STM images show that the (110) face of faceted Rh(210) exhibits various reconstructions (1×n, n=2–4) depending on oxygen coverage. Faceted Rh(210) is a potential template for studies of structure sensitive reactions.

Item Type: Article
Subjects: Physics
Depositing User: Ms Neetu Chandra
Date Deposited: 27 Apr 2012 11:39
Last Modified: 27 Apr 2012 11:39
URI: http://npl.csircentral.net/id/eprint/181

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