Mail address: Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an 710072, China.

Chinese version (中文版): 中国陕西省西安市长安区东祥路1号西北工业大学长安校区启翔楼247，邮编：710129

Email: iamzqrong@nwpu.edu.cn; chemrongzq@hotmail.com