1. Laboratory for Mechanics of Materials and Nanostructures Empa (Swiss Federal Laboratories for Materials Testing and Research) Thun 3602 Switzerland
2. Laboratory for Mesoscopic Systems Department of Materials ETH Zurich Zurich 8093 Switzerland
3. Laboratory for Multiscale Materials Experiments Paul Scherrer Institute Forschungsstrasse 111 Villigen PSI 5232 Switzerland
4. Cavendish Laboratory University of Cambridge JJ Thomson Ave Cambridge CB3 0HT UK
5. Ion Beam Physics Department of Physics ETH Zurich Zurich 8093 Switzerland