Cai Yuan, Chan Siu Keung, Sou Iam Keong, Chan Yu Fai, Su Dang Sheng, Wang Ning
Department of Physics and the Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Small. 2007 Jan;3(1):111-5. doi: 10.1002/smll.200600266.