Xiaogong Wang received his M.Sc. and Ph.D. degrees from Tsinghua University under the supervision of Professor Qixiang Zhou in 1984 and 1994, respectively. From 1985 to 1986, he worked as a visiting scholar with Professor Isao Ando at the Department of Polymer Chemistry, Tokyo Institute of Technology, Japan. From 1994 to 1997, he worked as a postdoctoral fellow and visiting scientist with Professor Sukant K. Tripathy at the Center for Advanced Materials, Department of Chemistry, University of Massachusetts at Lowell, U.S.A. He was promoted to full professor at the Department of Chemical Engineering, Tsinghua University in 1998. His main research interest is to develop azo polymers with novel photoresponsive functions and elaborate their mechanisms. His research is also dedicated to polymer self-assembly, polymer surface modification and liquid crystal polymer.

• Introduction.- Trans-Cis Isomerization.- Azo Polymer Syntheses.- Photoinduced Orientation and Anisotropy.- Photoinduced Mass Transport.- Photoresponsive Liquid Crystal Elastomers.