Jiunn-Woei Liaw, Chun-Hui Huang, Bae-Renn Chen and Mao-Kuen Kuo*
* Corresponding author: Mao-Kuen Kuo mkkuo@ntu.edu.tw
Nanoscale Research Letters 2012, 7:546 doi:10.1186/1556-276X-7-546