| Affiliation: | 1. Department of Physics, National University of Singapore, 10 Kent Ridge Crescent, Singapore 117542 (Singapore);2. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (P.R. China);3. Dalian Institute of Chemical Physics, Dalian 116023 (P.R. China), Fax: (+65)?6777‐6126;4. Department of Physics, Uppsala Univeristy, PO Box 530, S‐751 21 Uppsala (Sweden);5. Singapore Synchrotron Light source National University of Singapore, 5 Research Link, Singapore 117603 (Singapore) |
