1. College of Physics, Qingdao University, Qingdao, 266071, China
2. School of Electronic and Information Engineering, Qingdao University, Qingdao 266071, China
3. Collaborative Innovation Center for Eco-Textiles of Shandong Province, State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao, 266071, China
4. Weihai Innovation Research Institute of Qingdao University, Weihai, 264200, P. R. China