1. Fraunhofer IWM, MikroTribologie Centrum μTC, 76131Karlsruhe, Germany
2. FIT Freiburg Centre for Interactive Materials and Bioinspired Technologies, University of Freiburg, 79085Freiburg, Germany
3. Cluster of Excellence livMatS@FIT, 79110Freiburg, Germany
4. Fraunhofer IAP, 14476Potsdam, Germany