1. Department of Physics, Faculty of Science and Technology, Thammasat University, Pathumthani, 12121, Thailand
2. Research Unit in Innovative Sensors and Nanoelectronic Devices, Thammasat University, Pathumthani, 12121, Thailand
3. Department of Materials Science, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
4. Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
5. School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea
6. SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Korea