1. College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, China
2. Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenidada Universidade, Taipa, Macau 999078, China
3. Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
4. School of Engineering, University of East Anglia, Norwich NR4 7TJ, U.K.