1. Pillar of Engineering Product DevelopmentSingapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
2. Department of ChemistryNational University of Singapore Singapore 117543 Singapore
3. NUS Graduate School for Integrative Sciences and EngineeringNational University of Singapore 13 Centre for Life Sciences, 28 Medical Drive Singapore 117456 Singapore
4. Applied Mechanics LaboratoryDepartment of Engineering Mechanicsand Center for Nano and Micro MechanicsTsinghua University Beijing 100084 China
5. Department of Materials Science and EngineeringNational University of Singapore 9 Engineering Drive 1 Singapore 117575 Singapore