1. Chengdu Green Energy and Green Manufacturing Technology R&D Centre; Chengdu Science and Technology Development Center; China Academy of Engineering Physics; Chengdu 610207 China
2. Institute of Materials Research and Engineering (IMRE); A*STAR (Agency for Science; Technology and Research); 2 Fusionopolis Way Innovis #08-03 Singapore 138634 Republic of Singapore
3. Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Republic of Singapore
4. Department of Mechanical and Materials Engineering; University of Western Ontario; 1151 Richmond Street N London Canada