1. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, Shanghai, P. R. China
2. School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, Shanghai, P. R. China
3. Zhuhai Institute of Advanced Technology Chinese Academy of Sciences, Zhuhai 519000, Guangdong, P. R. China
4. Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330-8268, United States