1. SUTD−MIT International Design Center, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372
2. Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
3. School of Electrical and Computer Engineering, Xiamen University Malaysia, Jalan Sunsuria,
Bandar Sunsuria, 43900 Sepang, Selangor Darul Ehsan, Malaysia
4. Materials Research Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States