1 Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 30050, Republic of China. catchchang0220@gmail.com wschung@nctu.edu.tw.
The morphologies of an azobenzene-bridged biscalix[4]arene organogel in different organic solvents can be photo-reversibly switched between nanofibers and nanorings as well as between closed and open-form vesicles.