1. Department of Physics Institute for Nanotechnology and Advanced Materials Bar‐Ilan University Ramat‐Gan 5290002 Israel
2. Institute for Nanotechnology and Advanced Materials Bar‐Ilan University Ramat‐Gan 5290002 Israel
3. Agricultural Research Organization The Volcani Center Institute of Agricultural Engineering Rishon LeZion 7505101 Israel
4. School of Optometry and Vision Science Faculty of Life Sciences Bar‐Ilan University Ramat‐Gan 5290002 Israel
5. Department of Chemistry and Biochemistry University of California Los Angeles Los Angeles CA 90095 USA
6. California NanoSystems Institute University of California Los Angeles Los Angeles CA 90095 USA