1. School of Physics, Institute of Science, and NANOTEC-SUT COE on Advanced Functional Nanomaterials, Suranaree University of Technology, Nakhon Ratchasima, Thailand;
2. Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima, Thailand;
3. School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, Thailand