Electrochemical properties of seamless three-dimensional carbon nanotubes-grown graphene modified with horseradish peroxidase
Electrochemical properties of seamless three-dimensional carbon nanotubes-grown graphene modified with horseradish peroxidase
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DOI：
10.1016/j.bioelechem.2016.05.003
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发表时间：
2016-10-01
影响因子：
5
通讯作者：
Mulchandani, Ashok
中科院分区：
文献类型：
--
作者：
Komori, Kikuo;Terse-Thakoor, Trupti;Mulchandani, Ashok
通过十二烷基硫酸钠(十二烷基硫酸钠)将辣根过氧化物酶(HRP)固定在石墨烯表面生长的无缝三维碳纳米管(HRP-SDS/CNTs/G)表面，并研究了其电化学性质。与通过十二烷基硫酸钠修饰HRP的石墨烯电极(HRP-SDS/G电极)相比，由于碳纳米管生长在石墨烯表面，电活性HRP在碳纳米管/G电极表面的覆盖率增加了近2倍。基于电活性HRP表面覆盖率的增加，HRP-十二烷基硫酸钠/碳纳米管/G电极对H_2O_2的敏感度高于HRP-SDS/G电极。分析了碳纳米管/G电极与化合物I和II的直接电子转移反应动力学。(C)2016爱思唯尔B.V.保留所有权利。
Horseradish peroxidase (HRP) was immobilized through sodium dodecyl sulfate (SDS) on the surface of a seamless three-dimensional hybrid of carbon nanotubes grown at the graphene surface (HRP-SDS/CNTs/G) and its electrochemical properties were investigated. Compared with graphene alone electrode modified with HRP via SDS (HRP-SDS/G electrode), the surface coverage of electroactive HRP at the CNTs/G electrode surface was approximately 2-fold greater because of CNTs grown at the graphene surface. Based on the increase in the surface coverage of electroactive HRP, the sensitivity to H2O2 at the HRP-SDS/CNTs/G electrode was higher than that at the HRP-SDS/G electrode. The kinetics of the direct electron transfer from the CNTs/G electrode to compound I and II of modified HRP was also analyzed. (C) 2016 Elsevier B.V. All rights reserved.