1. School of Chemistry and Materials Science Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing 210044 China
2. Singapore Centre for 3D Printing School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
3. Environmental Process Modelling Centre Nanyang Environment and Water Research Institute Nanyang Technological University 1 Cleantech Loop Singapore 637141 Singapore
4. College of Materials Science and Engineering Zhejiang University of Technology Hangzhou 310014 China