1. Energy Research Institute at NTU (ERI@N), 1 CleanTech Loop, #06-04, CleanTech One, 6371412, Singapore
2. School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
3. Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore