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Performance assessment of polymer based electrodes for in vitro electrophysiological sensing: the role of the electrode impedance

2016Journal article Open Access
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dc.contributor.authorMedeiros, Maria C. R.
dc.contributor.authorMestre, Ana L. G.
dc.contributor.authorINÁCIO, PEDRO
dc.contributor.authorSantos, João M. L.
dc.contributor.authorAraújo, Inês
dc.contributor.authorBragança, José
dc.contributor.authorBiscarini, Fabio
dc.contributor.authorGomes, Henrique L.
dc.date.accessioned2017-04-07T15:57:18Z
dc.date.available2017-04-07T15:57:18Z
dc.date.issued2016
dc.description.abstractConducting polymer electrodes based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) are used to record extracellular signals from autonomous cardiac contractile cells and glioma cell cultures. The performance of these conducting polymer electrodes is compared with Au electrodes. A small-signal impedance analysis shows that in the presence of an electrolyte, both Au and polymer electrodes establish high capacitive double-layers. However, the polymer/electrolyte interfacial resistance is 3 orders of magnitude lower than the resistance of the metal/electrolyte interface. The polymer low interfacial resistance minimizes the intrinsic thermal noise and increases the system sensitivity. However, when measurements are carried out in current mode a low interfacial resistance partially acts as a short circuit of the interfacial capacitance, this affects the signal shape.
dc.identifier.doi10.1117/12.2237659
dc.identifier.isbn978-1-5106-0280-9
dc.identifier.issn0277-786X
dc.identifier.urihttp://hdl.handle.net/10400.1/9670
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSPIE
dc.relation.isbasedonWOS:000393153000001
dc.titlePerformance assessment of polymer based electrodes for in vitro electrophysiological sensing: the role of the electrode impedance
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceSan Diego, CA
oaire.citation.endPageUNSP 994408
oaire.citation.startPageUNSP 994404
oaire.citation.titleOrganic Sensors and Bioelectronics IX. Proceedings of SPIE
oaire.citation.volume9944
person.familyNameINÁCIO
person.familyNamePombinho de Araújo
person.familyNameBragança
person.familyNameGomes
person.givenNamePEDRO
person.givenNameInês Maria
person.givenNameJosé
person.givenNameHenrique Leonel
person.identifier2001885
person.identifierF-4703-2012
person.identifier.ciencia-id1510-2B36-5ED1
person.identifier.ciencia-idD11F-D4CA-2947
person.identifier.ciencia-idAC1D-FA9D-F66F
person.identifier.orcid0000-0003-1986-7918
person.identifier.orcid0000-0002-2438-0111
person.identifier.orcid0000-0001-9566-400X
person.identifier.orcid0000-0003-3664-4740
person.identifier.scopus-author-id55938897300
person.identifier.scopus-author-id56271084100
person.identifier.scopus-author-id6602220001
person.identifier.scopus-author-id7005305880
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication1d0c21f4-0f4b-4589-8412-fe1079419774
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