1. Faculty of Physics DongThap University Cao Lanh Vietnam
2. Laboratory of Applied Physics, Advanced Institute of Materials Science Ton Duc Thang University Ho Chi Minh City Vietnam
3. Faculty of Applied Sciences Ton Duc Thang University Ho Chi Minh City Vietnam
4. Thu Dau Mot University, Phu Hoa ward Thu Dau Mot city Binh Duong province Vietnam
5. Faculty of Applied Sciences HCMC University of Technology and Education Ho Chi Minh City Vietnam