1 Materials Department, University of California, Santa Barbara, USA.
2 Biomolecular Science and Engineering Program, University of California, Santa Barbara, USA.
3 The Raymond and Beverly Sackler School of Physics and Astronomy and The Center for Nanoscience and Nanotechnology, Tel Aviv University, Tel Aviv, Israel.
4 The Center of Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv, Israel.
5 Materials Department, University of California, Santa Barbara, USA. saleh@ucsb.edu.
6 Biomolecular Science and Engineering Program, University of California, Santa Barbara, USA. saleh@ucsb.edu.
7 Physics Department, University of California, Santa Barbara, USA. saleh@ucsb.edu.