Electrochemical Performance of Self-Assembled Monolayer Gold Nanoparticle-Modified Ultramicroelectrode Array Architectures

Jahir Orozco, Cecilia Jiménez-Jorquera, César Fernández-Sánchez

    Research output: Contribution to journalArticleResearchpeer-review

    8 Citations (Scopus)

    Abstract

    Surface architectures based on gold nanoparticles (AuNPs) electrodeposited on gold ultramicroelectrode arrays (UMEAs) and further modified with self-assembled monolayers (SAMs) of two different thiol molecules were evaluated. The voltammetric behavior of the resulting electrochemical transducer approaches appeared to be fairly different compared to that of SAM-modified UMEAs and microelectrode counterparts. Such behavior indicates that the electrodeposited AuNPs played a key role in the arrangement of the thiolated probes and the electron transfer processes at the transducer solution interface. A detailed description of this phenomenon was carried out with the aim of showing the potential of the presented SAM-AuNP-UMEA based transducer to develop robust biosensor approaches. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Original languageEnglish
    Pages (from-to)635-642
    JournalElectroanalysis
    Volume24
    Issue number3
    DOIs
    Publication statusPublished - 1 Mar 2012

    Keywords

    • DTSP
    • Gold nanoparticles
    • Selective desorption
    • Self-assembled monolayers
    • Ultramicroelectrode arrays

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