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

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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 µm) 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.

Immobilization of gold nanorods on optically transparent ITO electrodes provides tunable surface plasmon resonance detection coupled with electrochemical potential control. These novel sensors are applied to the detection and quantification of mercury with a combined SPR-electrochemical technique

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Acknowledgments

SEM images were acquired at the Materials Characterization Facility at the University of Central Florida with the assistance of Kirk Scammon. This work was funded by U.S. Department of Energy (DE-SC0004813).

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Authors and Affiliations

  1. Department of Chemistry, University of Central Florida, P.O. Box 25000, Orlando, FL, 32816-2366, USA

    Emily C. Heider, Khang Trieu, Victor M. Diaz, Karin Y. Chumbimuni-Torres & Andres D. Campiglia

  2. Civil, Construction and Environmental Engineering Department, University of Central Florida, P.O. Box 162450, Orlando, FL, 32816-2366, USA

    Steven J. Duranceau

Authors
  1. Emily C. Heider
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  2. Khang Trieu
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  3. Victor M. Diaz
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  4. Karin Y. Chumbimuni-Torres
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  5. Andres D. Campiglia
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  6. Steven J. Duranceau
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Correspondence to Andres D. Campiglia.

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Heider, E.C., Trieu, K., Diaz, V.M. et al. An indium tin oxide electrode modified with gold nanorods for use in potential-controlled surface plasmon resonance studies. Microchim Acta 180, 1013–1020 (2013). https://doi.org/10.1007/s00604-013-1017-4

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  • DOI: https://doi.org/10.1007/s00604-013-1017-4

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