1. School of Printing and Packaging Wuhan University Wuhan 430072 China
2. School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
3. Singapore‐HUJ Alliance for Research and Enterprise (SHARE) Campus for Research Excellence and Technological Enterprise (CREATE) Singapore 138602 Singapore
4. Sino‐Singapore International Joint Research Institute (SSIJRI) Guangzhou 510000 P. R. China