1. European Organization for Nuclear Research (CERN), CH-1211 Geneva, Switzerland
2. Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45141 Essen, Germany
3. Chair Materials for Electronics, Institute of Materials Science and Engineering and Institute of Micro and Nanotechnologies MacroNano®, TU Ilmenau, Gustav-Kirchhoff-Straße 5, 98693 Ilmenau, Germany