1. Department of Materials Science and Engineering and the Russel Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, 32000 Haifa, Israel.
2. The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France.
3. Natural History Museum of Los Angeles County, Los Angeles, CA 90007, USA.
4. Departments of Physics, Chemistry, Geoscience, University of Wisconsin–Madison, Madison, WI 53706, USA.
5. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
6. Laboratory of Bio-Inspired and Graphene Nanomechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123 Trento, Italy.
7. Department for Restorative and Preventive Dentistry, Centrum für Zahn-, Mund- und Kieferheilkunde, Charité–Universitätsmedizin Berlin, 14197 Berlin, Germany.
8. School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
9. Ket-Lab, Edoardo Amaldi Foundation, Italian Space Agency, Via del Politecnico snc, 00133 Rome, Italy.