Park, Ok-Kyung Choi, Yong-Mun Hwang, Jun Yeon Yang, Cheol-Min Kim, Tea-Wook You, Nam-Ho Koo, Hye Young Lee, Joong Hee Ku, Bon-Cheol Goh, Munju 2024-01-20T12:30:44Z 2024-01-20T12:30:44Z 2021-09-04 2013-05-10 0957-4484 https://pubs.kist.re.kr/handle/201004/128063 A chemical defect healing of reduced graphene oxide (RGO) was carried out via intramolecular cross-dehydrogenative coupling (ICDC) with FeCl3 at room temperature. The Raman intensity ratio of the G-band to the D-band, the I-G/I-D ratio, of the RGO was increased from 0.77 to 1.64 after the ICDC reaction. From XPS measurements, the A(C=C)/A(C-C) ratio, where the peak intensities from the C=C and C-C bonds are abbreviated as A(C=C) and A(C-C), of the RGO was increased from 2.88 to 3.79. These results demonstrate that the relative amount of sp(2)-hybridized carbon atoms is increased by the ICDC reaction. It is of great interest that after the ICDC reaction the electrical conductivity of the RGO was improved to 71 S cm(-1), which is 14 times higher than that of as-prepared RGO (5 S cm(-1)). English IOP PUBLISHING LTD CHEMICAL-REDUCTION RAMAN-SPECTROSCOPY THERMAL REDUCTION CARBON HYDRAZINE GRAPHITE NANOSHEETS ROUTE Defect healing of reduced graphene oxide via intramolecular cross-dehydrogenative coupling Article 10.1088/0957-4484/24/18/185604 1 NANOTECHNOLOGY, v.24, no.18 NANOTECHNOLOGY 24 18 scie scopus 000317468700014 2-s2.0-84876462713 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article CHEMICAL-REDUCTION RAMAN-SPECTROSCOPY THERMAL REDUCTION CARBON HYDRAZINE GRAPHITE NANOSHEETS ROUTE graphene reduced graphene oxide healing graphene oxide