[1] Singapore MIT Alliance Res & Technol SMART, Singapore 117456, Singapore
[2] Natl Univ Singapore, Dept Chem, Graphene Res Ctr, Singapore 117543, Singapore
[3] NUS Grad Sch Integrat Sci & Engn, Singapore 117597, Singapore
[4] Natl Univ Singapore, Div Bioengn, Singapore 117576, Singapore
[5] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
[6] Singapore MIT Alliance Res & Technol SMART, BioSyst & Micromech BioSyM IRG, Singapore 117543, Singapore
[7] Natl Univ Singapore, Mechanobiol Inst, Singapore 117411, Singapore
[8] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore