Zhang Yuanpeng, Liu Wei, Wang Rongming
Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100191, People's Republic of China.
Nanoscale. 2012 Apr 7;4(7):2394-9. doi: 10.1039/c2nr11985d. Epub 2012 Feb 28.