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Published on: December 4, 2014
The Nanostructuring of Atomically Flat Ru(0001) upon Oxidation and Reduction
1Department of Physical Electronics, Taras Shevchenko National University of Kyiv, Glushkova 4G, Kyiv, 03022, Ukraine. andreandy2000@gmail.com.
Abstract:
The O/Ru(0001) system is widely studied due to its rich phase variety of various stoichiometry and atomic arrangements, including the formation of a RuO2/Ru(0001) oxide layer. Apart from homogeneous ruthenium surfaces in certain oxidation states, also strongly heterogeneous surfaces can exist due to oxidation state's variation at the nanoscale. We report on a scanning tunneling microscopy (STM) study of the nanostructuring of the oxidized Ru(0001) surface as a result of its interaction with molecular oxygen at elevated temperatures and subsequent reduction of a resulting RuO2 film by CO or HCl molecules from the gas phase in high-vacuum environment.
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