石墨烯
材料科学
维数(图论)
石墨烯纳米带
双层石墨烯
氧化石墨烯纸
氧化物
电导率
石墨烯泡沫
拉曼光谱
纳米技术
石墨
电阻率和电导率
物理
数学
量子力学
纯数学
作者
Manash Jyoti Deka,Upama Baruah,Devasish Chowdhury
标识
DOI:10.1016/j.matchemphys.2015.07.036
摘要
Exfoliated graphene were obtained from SDS mediated exfoliation of graphite. The exfoliated graphene (Gexf–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.
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