1. Graduate School of Textile Science & Technology; Shinshu University; 3-15-1 Tokida Ueda Nagano 386-8567 Japan
2. High-speed AFM for Biological Applications Unit; Institute for Frontier Science Initiative; Kanazawa University, and Bio-AFM Frontier Research Center, Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
3. Department of Physics and Structural Biology Research Center; Graduate School of Science; Nagoya University; Furo-cho Chikusa-ku Nagoya, Aichi 464-8602 Japan
4. Division of Smart Textile; Institute for Fiber Engineering; Interdisciplinary Cluster for Cutting Edge Research; Shinshu University; 3-15-1 Tokida Ueda Nagano 386-8567 Japan