1. Centre for Protolife Research, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
2. Max Planck-Bristol Centre for Minimal Biology, School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
3. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
4. Zhangjiang Institute for Advanced Study (ZIAS), Shanghai Jiao Tong University, 429 Zhangheng Road, Shanghai 201203, P. R. China