1. College of Chemistry & Pharmacy Northwest A&F University 22 Xinong Road Yangling Shaanxi 712100 China
2. Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 China
3. Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering Northwestern Polytechnical University 127 West Youyi Road Xi'an 710072 China
4. Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China
5. School of Physical Science and Technology Lanzhou University Lanzhou 730000 China