Affiliation: | 1.Department of Materials, Henry Royce Institute and National Graphene Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK ;2.Petronas Research Sdn. Bhd., Lot 3288 & 3289, Off Jalan Ayer Itam, Kawasan Institusi Bangi, 43000, Kajang, Selangor Darul Ehsan, Malaysia ; |