1. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay Distr., Hanoi, Vietnam
2. Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay Distr., Hanoi, Vietnam
3. VNU University of Science, Vietnam National University, 334 Nguyen Trai Str., Thanh Xuan Distr., Hanoi, Vietnam
4. Faculty of Physics and Technology, TNU-University of Sciences, Tan Thinh Ward, Thai Nguyen City, Vietnam
5. International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan