1. Institute of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet Rd., Hanoi, Vietnam
2. Advanced Functional Materials for Energy and Environmental Applications Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States