SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 38: Poster Session III: Tribology: Surfaces and nanostructures I

O 38.3: Poster

Dienstag, 2. März 2021, 10:30–12:30, P

Frictional Behavior of Antimony Nanoparticles on HOPG at Elevated Temperatures — •Ebru Cihan, Dirk Dietzel, and Andre Schirmeisen — Justus-Liebig University Giessen Institute of Applied Physics 35392 Giessen, Germany

Structural Lubricity describes an effect leading to almost vanishing friction for the case of incommensurate interfaces. But although very low, friction still depends on the exact interface conditions, where especially relaxations between substrate and slider can lead to a dynamic enhancement of the effective energy barrier for lateral motion. Here, we present a tribological study of antimony nanoparticles sliding on highly oriented pyrolytic graphite (HOPG) at elevated temperatures. The high temperatures of up to several 100°C are used to drive the structural relaxation of nanoparticles on the substrate and the corresponding effects of contact aging are analyzed by both static and sliding friction and their respective contact area dependence. In addition, our experimental set-up should even allow to approach temperatures where sublimation of the antimony sets in and fundamentally changed interface conditions can be expected.