1. Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology Wangchan Rayong 21210 Thailand
2. Department of Chemistry Faculty of Science Chiang Mai University Muang District Chiang Mai 50200 Thailand
3. National Nanotechnology Center National Science and Technology Development Agency Klong Luang Pathumthani 12120 Thailand
4. Research Network of NANOTEC-VISTEC on Nanotechnology for Energy Vidyasirimedhi Institute of Science and Technology Wangchan Rayong 21210 Thailand