1. Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore
2. Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, 10-01 CREATE Tower, Singapore 138602, Singapore
3. Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India
4. Materials Department and Materials Research Laboratory, University of California, Santa Barbara, Santa Barbara, California 93106, United States of America
5. Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
6. Department of Electrical and Computer Engineering, University of Houston, Houston, Texas 77204, United States of America