Electrochemical impedance spectroscopy at single-walled carbon nanotube network ultramicroelectrodes

被引：29

作者：

Dumitrescu, Ioana ^{[1
]}

Unwin, Patrick R. ^{[1
]}

Macpherson, Julie V. ^{[1
]}

机构：

[1] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

Carbon nanotube networks; Ultramicroelectrodes; Electrochemical impedance spectroscopy; Electron transfer kinetics; ELECTRODES; SURFACES; FILMS; ENDS;

D O I：

10.1016/j.elecom.2009.08.057

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical impedance spectroscopy (EIS), coupled with chemical vapour deposition (CVD) grown single-walled carbon nanotube (SWNT) network disk-shaped ultramicroelectrodes (UMEs), gives stable, very well-defined and highly reproducible EIS responses for electrolysis of a simple outer sphere redox couple (FcTMA(+/2+)). The resulting EIS data can be fitted accurately using a simple electrical circuit model, enabling information on double-layer capacitance, diffusion coefficient of the electroactive species and the rate constant of ET (k(0)) to be extracted in a single EIS experiment. These values are replicated for a range of mediator concentrations and UME sizes (in the range 25-100 mu m diameter) demonstrating the robustness of the method. These initial studies bode well for impedance based electroanalysis using SWNT network UMEs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2081 / 2084

页数：4

共 19 条

[1] CHARGE-TRANSFER AT PARTIALLY BLOCKED SURFACES - A MODEL FOR THE CASE OF MICROSCOPIC ACTIVE AND INACTIVE SITES [J].

AMATORE, C ;

SAVEANT, JM ;

TESSIER, D .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 147 (1-2) :39-51

[2] OPTIMIZATION OF AC VOLTAMMETRIC MEASUREMENTS AT ULTRAMICROELECTRODES [J].

BARANSKI, AS .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 300 (1-2) :309-324

[3] Trace level cyclic voltarnmetry facilitated by single-walled carbon nanotube network electrodes [J].

Bertoncello, Paolo ;

Edgeworth, Jonathan P. ;

Macpherson, Julie V. ;

Unwin, Patrick R. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2007, 129 (36) :10982-+

[4]

Bertoncello P, 2007, J PHYS CHEM C, V111, P294, DOI [10.1021/jp065398l, 10.1021/jp0653981]

[5] ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY AT AN ULTRAMICROELECTRODE [J].

BRUCE, PG ;

LISOWSKAOLEKSIAK, A ;

LOS, P ;

VINCENT, CA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1994, 367 (1-2) :279-283

[6] Demonstration of the importance of oxygenated species at the ends of carbon nanotubes for their favourable electrochemical properties [J].

Chou, A ;

Böcking, T ;

Singh, NK ;

Gooding, JJ .

CHEMICAL COMMUNICATIONS, 2005, (07) :842-844

[7] Single-walled carbon nanotube network ultramicroelectrodes [J].

Dumitrescu, Ioana ;

Unwin, Patrick R. ;

Wilson, Neil R. ;

Macpherson, Julie V. .

ANALYTICAL CHEMISTRY, 2008, 80 (10) :3598-3605

[8] Controlled growth and characterization of two-dimensional single-walled carbon-nanotube networks for electrical applications [J].

Edgeworth, Jonathan P. ;

Wilson, Neil R. ;

Macpherson, Julie V. .

SMALL, 2007, 3 (05) :860-870

[9] Single-Walled Carbon Nanotubes Modified Graphite Electrodes for Electrochemical Monitoring of Nucleic Acids and Biomolecular Interactions [J].

Erdem, Arzum ;

Karadeniz, Hakan ;

Caliskan, Ayfer .

ELECTROANALYSIS, 2009, 21 (3-5) :464-471

[10] Nanoelectrode ensembles based on semi-interpenetrating network of carbon nanotubes [J].

Guo, Shaojun ;

Qu, Xiaohu ;

Dong, Shaojun .

ELECTROCHIMICA ACTA, 2007, 52 (20) :6186-6191

← 1 2 →