1. Department of Materials Science and Engineering, Technion–Israel Institute of Technology, 32000 Haifa, Israel.
2. Russell Berrie Nanotechnology Institute, Technion–Israel Institute of Technology, 32000 Haifa, Israel.
3. Department of Biology, Tel Aviv University, 69978 Tel Aviv, Israel.
4. European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France.
5. Departments of Physics and Chemistry, University of Wisconsin, Madison, WI 53706, USA; previously publishing as Gelsomina De Stasio.