Yu Zhibin, Li Lu, Zhang Qingwu, Hu Weili, Pei Qibing
Department of Materials Science and Engineering, Henry Samueli School of Engineering and Applied Science, University of California-Los Angeles, CA 90095, USA.
Adv Mater. 2011 Oct 11;23(38):4453-7. doi: 10.1002/adma.201101992. Epub 2011 Aug 24.