Nonuniform friction-area dependency for antimony oxide surfaces sliding on graphite

Claudia Ritter,1,2 Mehmet Z. Baykara,3 Bert Stegemann,4 Markus Heyde,1,* Klaus Rademann,1 Jan Schroers,2 and Udo D. Schwarz2,† 1Institute of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany 2Department of Mechanical Engineering and Materials Science and Center for Research on Interface Structures and Phenomena (CRISP), Yale University, P.O. Box 208284, New Haven, Connecticut 06520, USA 3Department of Mechanical Engineering and UNAM–Institute of Materials Science and Nanotechnology, Bilkent University, Bilkent, 06800 Ankara, Turkey 4Hochschule für Technik und Wirtschaft Berlin–University of Applied Sciences, Wilhelminenhofstrasse 75A, 12459 Berlin, Germany (Received 15 March 2013; revised manuscript received 14 June 2013; published 15 July 2013)