1. Department of Electronics, Faculty of Engineering, Kyushu University, Fukuoka 819-0385, Japan
2. Department of Electrical and Informatics Engineering, Vocational College, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
3. Nanomaterials and Nanotechnology Center, Electronic Convergence Division, Korea Institute of Ceramic Engineering & Technology, Gyeongsangnam-do 153801, South Korea
4. Center of Plasma Nano-Interface Engineering, Kyushu University, Fukuoka 819-0385, Japan
5. Center for Novel Science Initiatives, National Institutes of Natural Sciences, Fukuoka 819-0385, Japan