1. Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
2. Center
for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
3. Institute
of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, 117602, Singapore