Analysis of catechol, 4-methylcatechol and dopamine electrochemical reactions on different substrate materials and pH conditions

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Chumillas, Sara
dc.contributor.author Palomäki, Tommi
dc.contributor.author Zhang, Meng
dc.contributor.author Laurila, Tomi
dc.contributor.author Climent, Victor
dc.contributor.author Feliu, Juan M.
dc.date.accessioned 2018-12-10T10:28:09Z
dc.date.available 2018-12-10T10:28:09Z
dc.date.issued 2018-12-01
dc.identifier.citation Chumillas , S , Palomäki , T , Zhang , M , Laurila , T , Climent , V & Feliu , J M 2018 , ' Analysis of catechol, 4-methylcatechol and dopamine electrochemical reactions on different substrate materials and pH conditions ' Electrochimica Acta , vol. 292 , pp. 309-321 . DOI: 10.1016/j.electacta.2018.08.113 en
dc.identifier.issn 0013-4686
dc.identifier.issn 1873-3859
dc.identifier.other PURE UUID: b8e907ec-67f9-4efd-8ec0-927d597eae2a
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/analysis-of-catechol-4methylcatechol-and-dopamine-electrochemical-reactions-on-different-substrate-materials-and-ph-conditions(b8e907ec-67f9-4efd-8ec0-927d597eae2a).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85054716130&partnerID=8YFLogxK
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/35234
dc.description.abstract The electrochemical behavior of several structurally related catecholamine molecules has been investigated on different electrode materials with cyclic voltammetry, infrared spectroscopy and scanning tunnelling microscopy. Emphasis was on the identification of subsequent chemical processes that follow the main electron transfer step and complicate the interpretation of the mechanism, including the polymerization reaction and fouling of the electrode surface. Among the materials investigated, gold was found out to be the most active for the oxidation of catechol, 4-methylcatechol and dopamine. At the same time, it was also the electrode least sensitive to fouling after voltammetric cycling, exhibiting the highest reversibility. The effect of pH was also investigated. Increase in pH enhanced the processes of quinone hydroxylation and polymerization. Spectroscopic measurements allowed detection of both solution and adsorbed species participating in the oxidation and polymerization processes. Finally, STM resultsshowed the formation of polydopamine granules on gold surfaces, which grew in size as the number of cycles increased. Measured height of the granules, less than 0.5 nm, suggests a flat orientation of the molecules conforming the polymer. en
dc.format.extent 13
dc.format.extent 309-321
dc.language.iso en en
dc.relation.ispartofseries Electrochimica Acta en
dc.relation.ispartofseries Volume 292 en
dc.rights embargoedAccess en
dc.subject.other Chemical Engineering(all) en
dc.subject.other Electrochemistry en
dc.subject.other 213 Electronic, automation and communications engineering, electronics en
dc.subject.other 217 Medical engineering en
dc.subject.other 116 Chemical sciences en
dc.title Analysis of catechol, 4-methylcatechol and dopamine electrochemical reactions on different substrate materials and pH conditions en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department University of Alicante
dc.contributor.department Department of Electrical Engineering and Automation
dc.contributor.department Xiamen University
dc.subject.keyword Catecholamines
dc.subject.keyword Cyclic voltammetry
dc.subject.keyword Dopamine
dc.subject.keyword In situ infrared spectroscopy
dc.subject.keyword Scanning tunnelling microscopy
dc.subject.keyword Chemical Engineering(all)
dc.subject.keyword Electrochemistry
dc.subject.keyword 213 Electronic, automation and communications engineering, electronics
dc.subject.keyword 217 Medical engineering
dc.subject.keyword 116 Chemical sciences
dc.identifier.urn URN:NBN:fi:aalto-201812106249
dc.identifier.doi 10.1016/j.electacta.2018.08.113
dc.date.embargo info:eu-repo/date/embargoEnd/2020-10-01


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