1 Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan. stakeda@sci.hokudai.ac.jp y.kageyama@mail.sci.hokudai.ac.jp.
Submillimetre size self-assemblies composed of oleate and azobenzene derivatives show forceful motions such as screw-type coiling-recoiling motion by photoirradiation.