1. School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2. Research Network NANOTEC − SUT on Advanced Nanomaterials and Characterization, School of Chemistry, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
3. School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
4. National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani 12120, Thailand