1. Physics Department of Gubkin Russian State University of Oil and Gas, 65, Leninsky Prospekt, Moscow 119991, B-296, Russia, Department of Mechanical Engineering and Center for Nanoscale Science and Engineering, North Dakota State University, 111 Dolve Hall, Post Office Box 5285, Fargo, North Dakota 58105-5285, and Emanuel Institute of Biochemical Physics RAS, 4, Kosygina Street, Moscow 119334, Russia