1. Bioinspired Soft Matter Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha Onna-son Okinawa 904-0495 Japan
2. Shimadzu Techno-Research Co. Ltd.; 1 Nishinokyo, Nakagyo-ku Kyoto 604-8436 Japan
3. Imaging Section; Okinawa Institute of Science and Technology Graduate School; Japan