Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 22, Pages 11261-11267Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm30599b
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Funding
- Netherlands Organization for Scientific Research (NWO, TOP) [700.56.322]
- MESA+ Institute for Nanotechnology
- Agency for Science, Technology and Research (A*STAR) of Singapore under the A*STAR-NKTH [BIOSPONA]
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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.
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