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Issue 22, 2012
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Electrochemical sensing by surface-immobilized poly(ferrocenylsilane) grafts

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Abstract

Chemically modified electrodes, decorated with covalently tethered poly(ferrocenylsilane) – PFS chains, are fabricated. Robust, relatively dense redox-active films with a height of around 10 nm are successfully formed by reaction of poly(ferrocenyl(3-iodopropyl)methylsilane) with amine-terminated monolayers on silicon or gold surfaces. The electrochemical properties of the surface-immobilized PFS chains are studied using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), both in aqueous and organic media. Information on the properties of these films as a function of redox state is gained using quantitative adherence measurements between the films and AFM tips. An ascorbic acid electrochemical sensor based on these surface-anchored PFS chains, exhibiting a high sensitivity and stability, was fabricated. The PFS layers described are easily derivatized, thus forming a platform for creating highly tailorable redox-active interfaces.

Graphical abstract: Electrochemical sensing by surface-immobilized poly(ferrocenylsilane) grafts

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Publication details

The article was received on 31 Jan 2012, accepted on 16 Mar 2012 and first published on 16 Mar 2012


Article type: Paper
DOI: 10.1039/C2JM30599B
Citation: J. Mater. Chem., 2012,22, 11261-11267
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    Electrochemical sensing by surface-immobilized poly(ferrocenylsilane) grafts

    X. Sui, X. Feng, J. Song, M. A. Hempenius and G. J. Vancso, J. Mater. Chem., 2012, 22, 11261
    DOI: 10.1039/C2JM30599B

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