1. School of Science; Monash University Malaysia; Jalan Lagoon Selatan, 47500 Bandar Sunway Selangor Malaysia
2. Institute of Materials Research and Engineering (IMRE); Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, #08-01 Innovis Singapore 138634 Singapore
3. Department of Materials Science and Engineering; National University of Singapore; 9 Engineering Drive 1 Singapore 117575 Singapore
4. Faculty of Science, Health, Education and Engineering; University of the Sunshine Coast; Maroochydore Queensland 4558 Australia
5. Singapore Eye Research Institute (SERI); 11 Third Hospital Avenue Singapore 168751 Singapore