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

    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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