1. Singapore MIT Alliance; E4-04-10; 4 Engineering Drive 3 117576 Singapore Singapore
2. NUSNNI-Nanocore Laboratory; E3-05-29, Faculty of Engineering, National University of Singapore; 2 Engineering Drive 3, 117581 Singapore Singapore
3. Department of Materials Science and Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge, MA 02139-4307 USA
4. Institute of Materials Research and Engineering (IMRE); Agency for Science; Technology and Research 3 Research Link, 117602 Singapore Singapore