Electrocatalytic sensor devices: (I) cyclopentadienylnickel(II) thiolato Schiff base monolayer self-assembled on gold

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dc.contributor.authorMorrin, Aoife
dc.contributor.authorMoutloali, Richard M.
dc.contributor.authorKillard, Anthony J.
dc.date.accessioned2023-06-06T09:53:48Z
dc.date.available2023-06-06T09:53:48Z
dc.date.issued2004
dc.description.abstractThe fabrication of a self-assembled monolayer (SAM) of a cyclopentadienylnickel(II) thiolato Schiff base compound, [Ni(SC6H4NC(H)C6H4 OCH2CH2SMe)( 5-C5H5)]2 on a gold electrode is described. Effective electronic communication between the Ni(II) centres and the gold surface was established by electrochemically cycling the Schiff base-doped Au electrode in 0.1 M NaOH from −200 mV to +600 mV. The SAM-modified electrode exhibited quasi-reversible electrochemistry. The integrity of this electrocatalytic SAM, with respect to its ability to block and electro-catalyse certain Faradaic processes, was interrogated using cyclic voltammetric experiments. The formal potential, E◦ , varied with pH to give a slope of about −30 mV pH−1. The surface concentration, G, of the nickel redox centres was found to be 1.548 × 10−11 mol cm−2. By electrostatically doping the SAM using an applied potential of +700 mV versus Ag/AgCl, in the presence of horseradish peroxidase (HRP), it was fine-tuned for amperometric determination of H2O2. The electrocatalytic-type biosensor displayed typical Michaelis–Menten kinetics and the limit of detection was found to be 6.25 mM. © 2004 Elsevier B.V. All rights reserved.en_US
dc.identifier.citationMorrin, A. et al. (2004). Electrocatalytic sensor devices: (I) cyclopentadienylnickel(II) thiolato Schiff base monolayer self-assembled on gold. Talanta, 64 (1) , 30-38. https://doi.org/10.1016/j.talanta.2003.11.046en_US
dc.identifier.issn1873-3573
dc.identifier.urihttps://doi.org/10.1016/j.talanta.2003.11.046
dc.identifier.urihttp://hdl.handle.net/10566/9034
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectChemistryen_US
dc.subjectBiosensoren_US
dc.subjectElectrostatic dopingen_US
dc.subjectTechnologyen_US
dc.titleElectrocatalytic sensor devices: (I) cyclopentadienylnickel(II) thiolato Schiff base monolayer self-assembled on golden_US
dc.typeArticleen_US

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