1. Bio-Medical Center, R&D Division, Nanotechnology Product Business Group, Hitachi High-Technologies Corporation, 882, Ichige, Hitachinaka-shi, Ibaraki-ken, 312-8504, Japan, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan, and Proteogen, Inc., RM 1516 Windstone, Yangjae-dong, Seocho-ku, Seoul, Korea