Liquid-phase photo-induced covalent modification (PICM) of single-layer graphene by short-chain fatty acids
Liquid-phase photo-induced covalent modification (PICM) of single-layer graphene by short-chain fatty acids
复制标题
短链脂肪酸对单层石墨烯的液相光致共价修饰（PICM）
DOI：
10.1039/d2nr06698j
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发表时间：
2023
期刊：
影响因子：
6.7
通讯作者：
Uji-i Hiroshi
中科院分区：
文献类型：
--
作者：
Feng Guilin;Inose Tomoko;Suzuki Nozomu;Wen Han;Taemaitree Farsai;Wolf Mathias;Toyouchi Shuichi;Fujita Yasuhiko;Hirai Kenji;Uji-i Hiroshi
我们报道了一种有效的光诱导共价修饰（PICM）的石墨烯的短链脂肪酸（SCFAs）与一个烷基链在液-固界面的空间分辨化学功能化的石墨烯。在具有烷基链的SCFAs的水溶液下对单层石墨烯进行光照射有效地引入了sp3杂化缺陷，其中PICM的反应速率显著高于纯水中的反应速率。拉曼和红外光谱显示，高密度的甲基，甲氧基和乙酸酯基团共价连接到石墨烯表面，而它被其他含氧官能团，如OH和COOH部分氧化。在具有较长烷基链的PICM上观察到拉曼光谱中的G带的更大的下移，这表明电荷掺杂效应可以通过SCFA的烷基链长度来控制。对SCFAs共价修饰的系统研究和探索为石墨烯的带隙工程提供了新的思路和潜在的简便方法。
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 sp3-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.