1. Department of Biotechnology Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel, Tribology Laboratory, Holon Institute of Technology, Holon 58102, Israel, Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel, and Department of Materials Engineering and Ilse Katz Nanotechnology Center, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel