Insight into electrical conductivity of graphene and functionalized graphene: Role of lateral dimension of graphene sheet

被引：25
作者：
Deka, Manash Jyoti [1 ]
Baruah, Upama [1 ]
Chowdhury, Devasish [1 ]
机构：
[1] Inst Adv Study Sci & Technol, Div Phys Sci, Mat Nanochem Lab, Garchuk 781035, Guwahati, India
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2015年 / 163卷
关键词：
Nano-structures; Chemical synthesis; Electron microscopy; Fourier transform infrared spectroscopy; Electrical conductivity; REDUCED GRAPHENE; IMPEDANCE SPECTROSCOPY; OXIDE; LAYER;
D O I：
10.1016/j.matchemphys.2015.07.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Exfoliated graphene were obtained from SDS mediated exfoliation of graphite. The exfoliated graphene (G(exf)-SDS) were further subjected to functionalization to obtain reduced graphene (r-GO), acid chloride functionalized graphene oxide (GO-COCl), ester functionalized graphene oxide (GO-COOR), and amide functionalized graphene oxide (GO-CONH2). The impedance measurements were done on functionalized graphene by a simple layer-by-layer (LbL) assembly technique on silicon wafer substrate using chitosan as cationic binder. Further, the role of lateral dimension of the graphene sheet in a.c conductivity was also studied. It was observed that introduction of bulky groups in the graphene sheets may lead to the band gap opening which is responsible for lower a.c conductivity in case of functionalized graphene. Moreover sheet resistance values were determined for graphene and functionalized graphene. (C) 2015 Elsevier B.V. All rights reserved.
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收藏
页码：236 / 244
页数：9
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