* Corresponding authors

^a School of Materials Science and Engineering, Hefei University of Technology, Hefei, China

^b Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong
E-mail: feng.yan@polyu.edu.hk, jiyan.dai@polyu.edu.hk

^c Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong
E-mail: dangylei@cityu.edu.hk

^d School of Physical Science and Technology, Sichuan University, Chengdu, Sichuan, China