Impedance methods for electrochemical sensors using nanomaterials

被引：297
作者：
Suni, Ian I. [1 ]
机构：
[1] Clarkson Univ, CAMP, Dept Chem & Biomol Engn, Potsdam, NY 13699 USA
来源：
TRAC-TRENDS IN ANALYTICAL CHEMISTRY | 2008年 / 27卷 / 07期
关键词：
analyte detection; biosensor; carbon nanotube; electrochemical impedance spectroscopy; electrochemical sensor; gold nanoparticle; immunosensor; impedance; nanoparticle; nanomaterial;
D O I：
10.1016/j.trac.2008.03.012
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
This article presents an overview of electrochemical sensors that employ nanomaterials and utilize electrochemical impedance spectroscopy for analyte detection. The most widely utilized nanomaterials in impedance sensors are gold (Au) nanoparticles and carbon nanotubes (CNTs). Au nanoparticles have been employed in impedance sensors to form electrodes from nanoparticle ensembles and to amplify impedance signals by forming nanoparticle-biomolecule conjugates in the solution phase. CNTs have been employed for impedance sensors within composite electrodes and as nanoelectrode arrays. The advantages of nanomaterials in impedance sensors include increased sensor surface area, electrical conductivity and connectivity, chemical accessibility and electrocatalysis. (C) 2008 Elsevier Ltd. All rights reserved.
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收藏
页码：604 / 611
页数：8
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