1. Department of Materials Science and Engineering, National Chung Hsing University, 145 Xingda Road, South Dist., Taichung 402, Taiwan
2. Innovation and Development Center of Sustainable Agriculture (IDCSA), Research Center for Sustainable Energy and Nanotechnology, Center for Advanced Industry Technology and Precision Engineering, National Chung Hsing University, 145 Xingda Road, South Dist., Taichung, 402, Taiwan
3. Department of Electrical Engineering, Yale University, 15 Prospect Street, New Haven, Connecticut 06511, United States