1. State Key Laboratory
for Modification of Chemical Fibers and Polymer Materials, College
of Materials Science and Engineering, Donghua University, Shanghai 201620, China
2. Center of Super-Diamond
and Advanced Films (COSDAF), Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
3. Department of Physics, Donghua University, Shanghai 201620, China
4. International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan