Tailoring electroactive surfaces by non template molecular assembly. Towards electrooxidation of L-cysteine
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We have prepared a nanoelectrode ensemble containing vertically aligned single walled carbon nanotubes (SWCNTs) using a non-template molecular self-assembling strategy. We used a bottom-up construction approach to assemble amino functionalized SWCNTs (af-SWCNTs) in a well-defined architecture. These af-SWCNTs were linked and vertically aligned to pre-formed self-assembled monolayers of 4-MBA. A Cobalt(II) tetracarboxyphthalocyanine (Co(COOH)4Pc) complex was covalently bonded to external portion of af-SWCNTs to complete the final nanoelectrode ensemble. X-ray photoelectron spectroscopy (XPS) and Atomic Force Microcopy (AFM) confirmed the effectiveness of the assembling steps on the gold surface starting from the Au/MBA SAMs. The system Au/4-MBA/af-SWCNTs shows an interface with large ordered array, which exhibits a high activity for the electrooxidation of Lcysteine (L-cys). Theoretical calculations suggest that the incorporation of the af-SWCNTs increased the activity of the assembly to electronic transfer and it was observed that the electrooxidation reaction is energetically favorable.
FONDECYT-Chile Grants 1171449, 1140199, 1140192 and Proyecto Basal USA 1555-VRIDEI PUBLIC 021742PI Universidad de Santiago de Chile MINECO CTQ2015-64579-C3-3-P f Power- ed@NLHPC: NLHPC (ECM-02)
Artículo de publicación ISI
Quote ItemElectrochimica Acta 254 (2017) 201–213
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