Masafumi Jo*, Mitsuru Sato, Souta Miyamura, Hirotaka Sasakura, Hidekazu Kumano and Ikuo Suemune
* Corresponding author: Masafumi Jo m-jojo@es.hokudai.ac.jp
Nanoscale Research Letters 2012, 7:654 doi:10.1186/1556-276X-7-654
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