| Affiliation: | 1. School of Materials Science and Engineering, Nanyang Technological University, Singapore;2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore;3. School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore;4. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore;5. Faculty of Chemistry, Northeast Normal University, Changchun, Jilin, P. R. China |
