1. Department of Materials and Metallurgy Guizhou University Guiyang 550025 P. R. China
2. Innovative Centre for Flexible Devices (iFLEX) Max Planck–NTU Joint Lab for Artificial Senses School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
3. Institute of Materials Research and Engineering the Agency for Science Technology and Research (A*STAR) 2 Fusionopolis Way, Innovis, #08‐03 Singapore 138634 Singapore
4. College of Chemical Engineering Fuzhou University Fuzhou 350116 P. R. China
5. Institute for Digital Molecular Analytics and Science (IDMxS) Nanyang Technological University 59 Nanyang Drive Singapore 636921 Singapore