1. Department of Chemistry University of California Berkeley CA 94720 USA
2. Department of Physics Ben‐Gurion University of the Negev Be'er‐Sheva 8410501 Israel
3. Adámas Nanotechnologies, Inc. 8100 Brownleigh Dr, Suite 120 Raleigh NC 27617 USA
4. Department of Physics and CUNY‐Graduate Center CUNY‐City College of New York New York NY 10031 USA
5. Department of Chemical and Biomolecular Engineering, and Materials Science Division, Lawrence Berkeley National Laboratory University of California Berkeley CA 94720 USA
6. College of Staten Island CUNY 2800 Victory Blvd. Staten Island NY 10312 USA
7. Gemological Institute of America 50 W 47th New York NY 10036 USA