Nanosized graphene sheets induced high electrochemical activity in pure carbon film

被引：25

作者：

Huang, Liangliang ^{[1
,2
]}

Cao, Yuanyuan ^{[1
]}

Diao, Dongfeng ^{[1
]}

机构：

[1] Shenzhen Univ, INSE, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2018年 / 262卷

关键词：

Graphene; Carbon film; Electrochemical activity; Biosensor; ELECTRON-TRANSFER KINETICS; PLANE PYROLYTIC-GRAPHITE; DOPED-DIAMOND ELECTRODES; AMORPHOUS-CARBON; GLASSY-CARBON; SPUTTERING METHOD; ASCORBIC-ACID; OXIDATION; METHYLATION; FABRICATION;

D O I：

10.1016/j.electacta.2018.01.027

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We found that nanosized graphene sheets induced high electrochemical activity in pure carbon films, which prepared by electron cyclotron resonance (ECR) plasma sputtering under low-energy electron irradiation condition. The electrochemical properties were studied by electrochemical impedance spectroscopy and cyclic voltammetry. The graphene sheets embedded carbon (GSEC) films showed a wide potential window over 3.2 V. The charge transfer resistance and the oxidation-reduction peak separation (DEP) of the GSEC films are lower than amorphous carbon films in several redox systems (Fe(CN) 6 (4-/3-), Ru(NH3) 6(2+/3+), dopamine and ascorbic acid), especially in the inner-sphere system, the DEP is only half of amorphous carbon films. The high electrochemical activity of GSEC films originated from the nanosized graphene sheets, which offered faster electron transfer path and more reaction active sites. Our results indicate the GSEC films have great potential to be an electrochemical biosensor in detecting biomolecules with high oxidation potential. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：173 / 181

页数：9

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