1. Petronas Research Sdn Bhd, Jln Ayer Hitam, Kawasan Institusi Bangi, 43000 Bandar Baru Bangi, Selangor, Malaysia
2. Henry Royce Institute & National Graphene Institute, Department of Materials, School of Natural Sciences | Faculty of Science and Engineering, University of Manchester, Manchester M13 9PL, U.K.
3. School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, U.K.