1,J. H. Duan, S. G. Yang, H. W. Liu, J. F. Gong, H. B. Huang, X. N. Zhao,
R. Zhang, and Y. W. Du, J. Am. Chem. Soc. 127, 6180 2005.
http://pubs.acs.org/journals/jacsat/index.html
2, M. Ip, C. R. Wang, Q. Li, and S. K. Hark, Appl. Phys. Lett. 84, 7952004.
http://search.ebscohost.com/Login.aspx?direct=true&authtype=cookie,ip,url,uid&db=afh&scope=site&jid=%227y1%22
3,J. Zhang, F. Jiang, and L. Zhang, J. Phys. Chem. B 108, 7002 2004.
http://pubs.acs.org/journals/jpcbfk/index.html
4,T. Gao and T. Wang, J. Phys. Chem. B 108, 20045 2004.
http://pubs.acs.org/journals/jpcbfk/index.html