1. Center for Advanced Research of Energy Conversion
Materials, Hokkaido University, North 13
West 8, Kita-ku, Sapporo, 060-8628, Japan
2. Department of Chemical Engineering, Gadjah Mada University, Jalan Grafika 2, Bulaksumur,
Yogyakarta 55281, Indonesia
3. Department of Manufacturing and Materials Engineering, Kulliyyah
of Engineering, International Islamic University, 50728 Kuala Lumpur, Malaysia