1. Department of Life Sciences, ‡Ilse Katz Institute
for Nanoscale Science
and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel
2. Department of Bioengineering, ∥Department of Aerospace and Mechanical Engineering, ⊥Materials Science
Program, University of California San Diego, 9500 Gillman Dr., La Jolla, California 92093, United States