Electrochemical behavior of screen-printed carbon electrodes as transducers in biosensors

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dc.creatorRicardo Adriano Dorledo de Faria
dc.creatorAlexandre Douaud
dc.creatorRenata Braga Soares
dc.creatorLuiz Guilherme Dias Heneine
dc.creatorTulio Matencio
dc.creatorVanessa de Freitas Cunha Lins
dc.creatorYounès Messaddeq
dc.date.accessioned2023-08-17T18:16:46Z
dc.date.accessioned2025-09-09T00:45:05Z
dc.date.available2023-08-17T18:16:46Z
dc.date.issued2020
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.5006/3203
dc.identifier.issn1938-159X
dc.identifier.urihttps://hdl.handle.net/1843/57898
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofCorrosion
dc.rightsAcesso Restrito
dc.subjectEletroquímica
dc.subjectEspectroscopia de impedância
dc.subjectBiossensores
dc.subjectDetectores eletroquímicos
dc.subjectEletrodo de carbono
dc.subjectRaman, Espectroscopia de
dc.subject.otherCorrosion
dc.subject.otherFaradaic electrochemical impedance spectroscopy (EIS)
dc.subject.otherNon-faradaic electrochemical impedance spectroscopy (EIS)
dc.subject.otherScreen-printed carbon electrode
dc.subject.otherSensor
dc.titleElectrochemical behavior of screen-printed carbon electrodes as transducers in biosensors
dc.typeArtigo de periódico
local.citation.epage561
local.citation.issue6
local.citation.spage553
local.citation.volume76
local.description.resumoScreen-printed carbon electrode (SPCE) was examined as a transducer substrate for application in electrochemical sensors. Aqueous solutions of 0.1 M KCl and 0.1 M KCl + 5 mM K3[Fe(CN)6]/K4[Fe(CN)6] (redox solution) were prepared to simulate the environment of faradaic and non-faradaic sensing, respectively. The SPCE presented an irregular surface composed by two main carbon phases. Raman spectroscopy results revealed the presence of peaks around 1,580 cm−¹ and 1,334 cm−¹ related to the G and D bands corresponding to sp² carbon atoms (graphite flakes) and a multitude of broad bands associable to amorphous sp³ carbon in the ink matrix. Conductive atomic force microscopy indicated that the irregular structure of the SPCE led to the heterogeneous distribution of the current over the surface and the electroactivity of this material was mainly attributed to the presence of graphite. Polarization curves and electrochemical impedance spectroscopy (EIS) revealed that the redox solution was more aggressive to the SPCE, despite this electrode was achieved a quasi-steady state for 1 h under the effect of a polarization potential in both electrolytes, which justifies its use as an electrochemical transducer in faradaic and non-faradaic devices.
local.identifier.orcidhttps://orcid.org/0000-0002-7025-7042
local.identifier.orcidhttps://orcid.org/0000-0002-7642-8404
local.identifier.orcidhttps://orcid.org/0000-0003-0707-2691
local.identifier.orcidhttps://orcid.org/0000-0002-5660-8125
local.identifier.orcidhttps://orcid.org/0000-0002-6357-9553
local.identifier.orcidhttps://orcid.org/0000-0002-0868-2726
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA QUÍMICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://meridian.allenpress.com/corrosion/article-abstract/76/6/553/445532/Electrochemical-Behavior-of-Screen-Printed-Carbon

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