1. NDAC Centre, Kwangwoon University, Nowon-gu, Seoul 01897, South Korea
2. Department of Electronic Engineering, Kwangwoon University, Nowon-gu, Seoul 01897, South Korea
3. NanoBioTech Laboratory, Department of Natural Sciences, Division of Sciences, Arts, & Mathematics, Florida Polytechnic University, Lakeland, Florida 33805, United States
4. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
5. School of Information Science and Engineering, University of Jinan, Jinan 250022, China