Title

An indium tin oxide electrode modified with gold nanorods for use in potential-controlled surface plasmon resonance studies

Authors

Authors

E. C. Heider; K. Trieu; V. M. Diaz; K. Y. Chumbimuni-Torres; A. D. Campiglia;S. J. Duranceau

Comments

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Abbreviated Journal Title

Microchim. Acta

Keywords

Gold nanorod immobilization; Potential-controlled SPR; Nanorod; electrochemical sensor; Mercury detection; NANOPARTICLE-MODIFIED ELECTRODES; ENHANCED RAMAN-SCATTERING; MODIFIED; ITO ELECTRODE; SENSOR; FABRICATION; Chemistry, Analytical

Abstract

The modification of electrodes with gold nanoparticles results in an increased electrode surface area, enhanced mass transport, and improved catalytic properties. We have extended this approach to indium tin oxide (ITO) electrodes to obtain optically transparent gold nanorod-modified electrodes which display enhanced electrochemical capabilities and have the additional advantage of showing a tunable surface plasmon resonance. The procedures for attaining high surface coverage (15 gold nanorods per square A mu m) of such electrodes were optimized, and the potential-dependent surface plasmon resonance was studied under controlled electrical potential. In an exemplary sensor application, we demonstrate the detection of mercury via potential-dependent formation of an Au-Hg amalgam.

Journal Title

Microchimica Acta

Volume

180

Issue/Number

11-12

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

1013

Last Page

1020

WOS Identifier

WOS:000322524100008

ISSN

0026-3672

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