1. Department of Materials Science & Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan R.O.C.
2. Department
of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei 10608, Taiwan R.O.C.
3. Department
of Life, Environment, and Materials Science, Fukuoka Institute of Technology, 3-30-1, Wajirohigashi, Higashiku, Fukuoka 811-0295, Japan
4. Institute
of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
5. Department
of Materials Science and Engineering, Feng Chia University, Taichung 407, Taiwan R.O.C.
6. State Key
Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Science, Beijing 100083, P. R. China