1. School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
2. Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, USA
3. School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
4. National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, Thailand
5. Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, USA
6. Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA