1. Department of Materials and Interfaces Weizmann Institute Rehovot 76100 Israel
2. Schools of Chemistry and Physics Tel‐Aviv University Tel Aviv 69978 Israel
3. Department of Chemical Research Support Weizmann Institute Rehovot 76100 Israel
4. Condensed Matter Physics Department Jozef Stefan Institute Jamova 39 1000 Ljubljana Slovenia
5. Nanoscience and Nanotechnology Cinvestav Mexico City, P.O. Box 14‐740 07000 México D.F. Mexico
6. Materials Science and Chemical Engineering Department Stony Brook University Stony Brook NY 11794 USA