1. School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand;
2. Research Network NANOTEC-SUT on Advanced Nanomaterials and Characterization, School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasama, Thailand;
3. Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, Thailand;
4. Research Center for Academic Excellence in Applied Physics, Faculty of Science, Naresuan University, Phitsanulok, Thailand;
5. Division of Physics, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi (RMUTT), Pathumthani, Thailand;
6. School of Energy Science and Engineering and Research Network NANOTEC-VISTEC on Nanotechnology for Energy, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, Thailand