1. School of Material Science and Engineering, Nanyang Technological University, Block N4.1 50 Nanyang Avenue, 639798 Singapore
2. Singapore Institute for Manufacturing Technology (SIMTech), 71 Nanyang Drive, 638075 Singapore
3. School of Chemical and Biomolecular Engineering, Nanyang Technological University, 639798 Singapore
4. Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan