Koo, Hye Young Lee, Ha-Jin Noh, Yong-Young Lee, Eui-Sup Kim, Yong-Hyun Choi, Won San 2024-01-20T15:03:34Z 2024-01-20T15:03:34Z 2021-09-05 2012-04 0959-9428 https://pubs.kist.re.kr/handle/201004/129387 We report the theory and synthesis of sub-nanosized gold clusters on reduced graphene oxide (r-GOs). The Au sub-nanoclusters were found to be nucleated and grown at defects of the r-GOs, particularly on nitrogen-induced defects from density functional theory investigation. The resulting Au/r-GOs exhibit an improvement of bulk electrical conductivities and a reduced ratio of the intensity of the D band to that of the G band (I-D/I-G), compared to the r-GOs without Au nanoclusters. The unique decrease of the I-D/I-G was demonstrated to be related to the filling of subnano-sized Au clusters on the r-GOs, presumably owing to enhancing the flat geometry of the graphene nanosheets. English ROYAL SOC CHEMISTRY SHEETS COMPOSITES OXIDE Gold nanoparticle-doped graphene nanosheets: sub-nanosized gold clusters nucleate and grow at the nitrogen-induced defects on graphene surfaces Article 10.1039/c2jm16195h 1 JOURNAL OF MATERIALS CHEMISTRY, v.22, no.15, pp.7130 - 7135 JOURNAL OF MATERIALS CHEMISTRY 22 15 7130 7135 scie scopus 000301957300009 2-s2.0-84858988043 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article SHEETS COMPOSITES OXIDE