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Benzene diazonium sulfonate modified nanoporous gold electrodes for the direct detection of Cu2+

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Show simple item record Siepenkoetter, Till Mastin, Hélène Salaj-Kośla, Urszula Magner, Edmond 2020-12-22T12:46:28Z 2020
dc.description peer-reviewed en_US
dc.description The full text of this article will not be available in ULIR until the embargo expires on the 17/11/2021
dc.description.abstract The detection of Cu2+ on surface modified nanoporous gold in aqueous solution is reported. Nanoporous gold electrodes were prepared with a wide range of pore sizes by dealloying of sputtered gold-silver alloys in concentrated nitric acid. Varying the pore sizes can significantly improve the electroactive surface area of the electrodes as well as protect the surface from biofouling materials, both necessary for the direct detection of trace metals in untreated samples. Two surface modifications i.e. a self-assembled monolayer of 3-mercapto-1-propanesulfonate and electro-grafted benzene diazonium sulfonate were evaluated. Underpotential deposition of Cu2+ and subsequent stripping of the deposited copper was achieved utilizing square wave voltammetry. The sensor was capable of accurately measuring Cu2+ concentrations in a range of water sample (tap, rain and river water) without the necessity of prior pre-treatment of the samples. The sensor had a linear range of 0.2 to 25 µM, which encompasses the accepted maximum limit for the concentration of copper in drinking water (20.5 µM). The sensitivity was 8.18 µA cm-2 µM-1 with a limit of detection of 18.9 nM (~1.2 ppb). The response of the sensor in artificial human serum was unaffected by the sample matrix, demonstrating the ability of the system to resist fouling by serum en_US
dc.language.iso eng en_US
dc.publisher Wiley and Sons Ltd en_US
dc.relation 607793 en_US
dc.relation.ispartofseries ChemElectroChem;7 (22), pp. 4625-4632
dc.rights This is the peer reviewed author version of the following article: Benzene diazonium sulfonate modified nanoporous gold electrodes for the direct detection of Cu2+, ChemElectroChem, 2020, Volume 7, Issue 22, pp. 4625-4632, which has been published in final form at . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. en_US
dc.subject nanoporous en_US
dc.subject gold electrodes en_US
dc.title Benzene diazonium sulfonate modified nanoporous gold electrodes for the direct detection of Cu2+ en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1002/celc.202001158
dc.contributor.sponsor European Union (EU) en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid 607793 en_US 2021-11-17
dc.embargo.terms 2021-11-17 en_US
dc.rights.accessrights info:eu-repo/semantics/embargoedAccess en_US

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