1. Department of Materials Science and Engineering and the Russell Berrie Nanotechnology Institute Technion−Israel Institute of Technology Haifa 32000 Israel
2. Moriah Scientific Consulting Yehiel Paldi St 11 Rehovot 7624811 Israel
3. The European Synchrotron CS 40220 Grenoble Cedex 9 38043 France
4. Department of Restorative and Preventive Dentistry Institute for Dental and Craniofacial Sciences Charité–Universitätsmedizin Berlin Berlin 14197 Germany