Daisuke Asai, Jeong-Hun Kang, Riki Toita, Akira Tsuchiya, Takuro Niidome, Hideki Nakashima and Yoshiki Katayama*
* Corresponding author: Yoshiki Katayama ykatatcm@mbox.nc.kyushu-u.ac.jp
Nanoscale Research Letters 2008, 4:229-233 doi:10.1007/s11671-008-9230-5