1. Electrical Engineering, Ingram School of Engineering and Materials Science, Engineering & Commercialization Program, Texas State University, San Marcos, Texas 78666, United States
2. Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
3. Electrical Engineering, Ingram School of Engineering, Texas State University, San Marcos, Texas 78666, United States
4. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695-7916, United States