1. Key Laboratory of Ministry of Education for Green Chemical Technology, R&D Center for Petrochemical Technology, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
2. Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
3. Nanoscience and Technology Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
4. Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, United States
5. Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University, Carbondale, Illinois 62901, United States