Liu Yan Jun, Ding Xiaoyun, Lin Sz-Chin Steven, Shi Jinjie, Chiang I-Kao, Huang Tony Jun
Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.
Adv Mater. 2011 Apr 12;23(14):1656-9. doi: 10.1002/adma.201003708. Epub 2011 Mar 14.