1. Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Kaiserstrasse 12, 76131 Karlsruhe, Germany
2. KIT IAM-CMS MicroTribology Center (μTC), Strasse Am Forum 5, 76131 Karlsruhe, Germany
3. Department of Materials, Imperial College London, South Kensington Campus, Exhibition Road, SW7 2AZ London, U.K.
4. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, Exhibition Road, SW7 2AZ London, U.K.
5. Max Planck Institute for Intelligent Systems (MPI-IS), Heisenbergstrasse 3, 70569 Stuttgart, Germany
6. Fraunhofer Institute for Mechanics of Materials (IWM), Woehlerstrasse 11, 79108 Freiburg, Germany