Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

O 47: Poster Tuesday: Scanning Probe Techniques

O 47.11: Poster

Tuesday, April 2, 2019, 18:00–20:00, Poster D

Temperature dependence of directional nanofriction on NaCl — •Jennifer Konrad, Dirk Dietzel, and Andre Schirmeisen — Institute of Applied Physics, Justus-Liebig University Giessen, 35392 Giessen, Germany

On the nanometer scale, the directional dependence of friction is a well known phenomenon [1] that is typically related to the lattice structure of the sample with different energy barrier heights related to different sliding directions. Consequently, temperature should influence the friction pattern with more defined structures expected at low temperatures according to the concept of thermally activated friction. In this work, this fundamental assumption is analyzed by temperature dependent friction force microscopy on NaCl under UHV conditions. As a result, our measurements do not only document the general effect of temperature, but also highlight the additional influences of parameters like wear and tip shape on the effective friction pattern.

[1] S. G. Balakrishna, A. S. de Wijn, and R. Bennewitz, Physical Review B 89, (2014).