1. Center for Basic Research on Materials National Institute for Materials Science 1‐2‐1 Sengen Tsukuba 305‐0047 Japan
2. Reconfigurable Robotics Laboratory École Polytechnique Fédérale de Lausanne (EPFL) Lausanne 1015 Switzerland
3. Graduate School of Comprehensive Human Sciences University of Tsukuba 1‐1‐1 Tennodai Tsukuba 305‐8573 Japan
4. School of Materials Science and Engineering Southwest University of Science and Technology Mianyang 621010 China
5. Research Center for Macromolecules and Biomaterials National Institute for Materials Science 1‐2‐1 Sengen Tsukuba 305‐0047 Japan