1. WPI – Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
2. Departement Fisika, FMIPA Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
3. Integrated Laboratory of Energy and Environment FMIPA Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
4. Department of Environmental and Energy Engineering, The University of Suwon, 17, Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do, 18323, Republic of Korea