1. Center for Programmable MaterialsSchool of Materials Science and EngineeringNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
2. Institute for Sports ResearchNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
3. School of Materials Science and EngineeringUniversity of Science and Technology Beijing Beijing 100083 China
4. Department of ChemistryCity University of Hong Kong Kowloon Hong Kong China