1. Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresource Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi’an, 710021, P. R. China
2. School of Materials and Chemical Engineering, Xi’an Technological University, Xi’an, 710021, P. R. China
3. Frontiers Science Center for Flexible Electronics, Xi’an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, Xi’an 710072, China