1. Institute of Physics, Vietnam Academy of Science and Technology 1 , 10 Dao Tan, Ba Dinh, Hanoi 11108, Vietnam
2. Chemical Engineering Department, University of Illinois at Chicago 2 , Chicago, Illinois 60608, USA
3. Graduate University of Science and Technology, Vietnam Academy of Science and Technology 3 , 18 Hoang Quoc Viet, Cau Giay, Hanoi 11307, Vietnam