1. Department of Chemical and Biomolecular Engineering; National University of Singapore; Singapore 117585 Singapore
2. Key Laboratory of Eco-environments in Three Gorges Reservoir (Ministry of Education); School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 P. R. China
3. Department of Physics; National University of Singapore; Singapore 117542 Singapore
4. Department of Biomedical Engineering; National University of Singapore; Singapore 117575 Singapore
5. Centre for Advanced 2D Materials; Graphene Research Centre; National University of Singapore; Singapore 117546 Singapore
6. NUS Graduate School for Integrative Sciences and Engineering; National University of Singapore; Singapore 117456 Singapore
7. Mechanobiology Institute; National University of Singapore; Singapore 117411 Singapore