1. Laboratory of Advanced Materials, University of Science, Vietnam National University, HoChiMinh City, Vietnam
2. Faculty of Applied Science, University of Technology, Vietnam National University, HoChiMinh City, Vietnam
3. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
4. Department
of Physics, University of Ulsan, Ulsan 13557 Korea
5. Center of Excellence on Alternative Energy,
Research Development Institute, Program of Physics, Faculty of Science
and Technology, Sakon Nakhon Rajabhat University, 680 Nittayo, Mueang District, Sakon Nakhon, 74000, Thailand
6. Faculty of Materials Science, University of Science, Vietnam National University, HoChiMinh City, Vietnam