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Liquid-phase photo-induced covalent modification (PICM) of single-layer graphene by short-chain fatty acids
| Title: | Liquid-phase photo-induced covalent modification (PICM) of single-layer graphene by short-chain fatty acids |
| Authors: | Feng, Guilin Browse this author | | Inose, Tomoko Browse this author | | Suzuki, Nozomu Browse this author | | Wen, Han Browse this author | | Taemaitree, Farsai Browse this author | | Wolf, Mathias Browse this author | | Toyouchi, Shuichi Browse this author | | Fujita, Yasuhiko Browse this author | | Hirai, Kenji Browse this author →KAKEN DB | | Uji-i, Hiroshi Browse this author |
| Issue Date: | 2023 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Nanoscale |
| Volume: | 15 |
| Issue: | 10 |
| Start Page: | 4932 |
| End Page: | 4939 |
| Publisher DOI: | 10.1039/d2nr06698j |
| Abstract: | We report an efficient photo-induced covalent modification (PICM) of graphene by short-chain fatty acids (SCFAs) with an alkyl chain at the liquid-solid interface for spatially resolved chemical functionalization of graphene. Light irradiation on monolayer graphene under an aqueous solution of the SCFAs with an alkyl chain efficiently introduces sp(3)-hybridized defects, where the reaction rates of PICM are significantly higher than those in pure water. Raman and IR spectroscopy revealed that a high density of methyl, methoxy, and acetate groups is covalently attached to the graphene surface while it was partially oxidized by other oxygen-containing functional groups, such as OH and COOH. A greater downshift of the G-band in Raman spectra was observed upon the PICM with longer alkyl chains, suggesting that the charge doping effect can be controlled by the alkyl chain length of the SCFAs. The systematic research and exploration of covalent modification in SCFAs provide new insight and a potentially facile method for bandgap engineering of graphene. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/89688 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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