1. Centre for Micro-/Nano-electronics (NOVITAS); School of Electrical and Electronic Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
2. CINTRA UMI CNRS/NTU/THALES; Singapore 637553 Singapore
3. Centre for Programmed Materials; School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue Singapore 639798 Singapore
4. State Key Laboratory of Silicon Materials; School of Materials Science and Engineering; Zhejiang University; Hangzhou Zhejiang 310027 P. R. China
5. Department of Physics; National University of Singapore; Singapore 117542 Singapore
6. School of Physical and Mathematical Sciences; Nanyang Technological University; 21 Nanyang Link Singapore 639798 Singapore