• 文献标题:   Liquid-phase photo-induced covalent modification (PICM) of single-layer graphene by short-chain fatty acids
  • 文献类型:   Article
  • 作  者:   FENG GL, INOSE T, SUZUKI N, WEN H, TAEMAITREE F, WOLF M, TOYOUCHI S, FUJITA Y, HIRAI K, UJII H
  • 作者关键词:  
  • 出版物名称:   NANOSCALE
  • ISSN:   2040-3364 EI 2040-3372
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1039/d2nr06698j EA FEB 2023
  • 出版年:   2023

▎ 摘  要

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.