Karaphun, Attaphol
Hunpratub, Sitchai
Phokha, Sumalin
Putjuso, Thanin
Swatsitang, Ekaphan
Funding for this research was provided by:
by the Higher Education Research Promotion and National Research University Project of Thailand, Office of the Higher Education Commission.
The Integrated Nanotechnology Research Center and Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002 Thailand