Controlling ions and electrons in aqueous solution: an alternative point of view of the charge-transport behavior of eumelanin-inspired material

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dc.contributor.authorPaulin, João V.
dc.contributor.authorPereira, Mariane P.
dc.contributor.authorBregadiolli, Bruna A. [UNESP]
dc.contributor.authorCachaneski-Lopes, João P. [UNESP]
dc.contributor.authorGraeff, Carlos F. O. [UNESP]
dc.contributor.authorBatagin-Neto, Augusto [UNESP]
dc.contributor.authorBufon, Carlos C. B. [UNESP]
dc.contributor.institutionMackenzie Institute for Research in Graphene and Nanotechnologies
dc.contributor.institutionBrazilian Center for Research in Energy and Materials (CNPEM)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionMackenzie Evangelical Faculty of Paraná
dc.date.accessioned2023-07-29T16:12:28Z
dc.date.available2023-07-29T16:12:28Z
dc.date.issued2023-04-17
dc.description.abstractThe possibility of current injection and transport in eumelanin films, humans' most common natural pigment, has fascinated physicists and materials scientists since the early’ 60s. Nowadays, it is accepted that ionic transport is dominant in wet environments. The present study evaluates the charge transport in eumelanin-inspired films immersed in pure water and ionic aqueous solutions. Both current vs. voltage and voltage-dependent impedance/dielectric spectroscopy measurements are reported. The data confirm that the electrical response in pure water is dominated by ionic/protonic conduction, similar to standard eumelanin. Contrariwise, the protonic contribution is suppressed by faster electronic transport in an ionic aqueous solution. Considering these observations, an electrochemically doped mechanism is evoked to explain the charge transport of this class of material. The results yield new opportunities for tuning eumelanin-inspired materials' protonic and electronic conductivity and advancing towards in vivo implantable eumelanin-based (bio)devices.en
dc.description.affiliationMackenzie Presbyterian Institute Mackenzie Institute for Research in Graphene and Nanotechnologies, SP
dc.description.affiliationBrazilian Nanotechnology National Laboratory (LNNano) Brazilian Center for Research in Energy and Materials (CNPEM), SP
dc.description.affiliationSão Paulo State University (UNESP) School of Sciences Department of Physics, SP
dc.description.affiliationSão Paulo State University (UNESP) Postgraduate Program in Materials Science and Technology (POSMAT), SP
dc.description.affiliationSão Paulo State University (UNESP) Institute of Science and Engineering, SP
dc.description.affiliationMackenzie Evangelical Faculty of Paraná, PR
dc.description.affiliationUnespSão Paulo State University (UNESP) School of Sciences Department of Physics, SP
dc.description.affiliationUnespSão Paulo State University (UNESP) Postgraduate Program in Materials Science and Technology (POSMAT), SP
dc.description.affiliationUnespSão Paulo State University (UNESP) Institute of Science and Engineering, SP
dc.description.sponsorshipAdvanced Foods and Materials Canada
dc.description.sponsorshipAssociation Française contre les Myopathies
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipMinistry of Science and Technology
dc.format.extent6107-6118
dc.identifierhttp://dx.doi.org/10.1039/d3tc00490b
dc.identifier.citationJournal of Materials Chemistry C, v. 11, n. 18, p. 6107-6118, 2023.
dc.identifier.doi10.1039/d3tc00490b
dc.identifier.issn2050-7534
dc.identifier.issn2050-7526
dc.identifier.scopus2-s2.0-85153955730
dc.identifier.urihttp://hdl.handle.net/11449/249905
dc.language.isoeng
dc.relation.ispartofJournal of Materials Chemistry C
dc.sourceScopus
dc.titleControlling ions and electrons in aqueous solution: an alternative point of view of the charge-transport behavior of eumelanin-inspired materialen
dc.typeArtigo
unesp.author.orcid0000-0002-2379-6203[1]
unesp.author.orcid0000-0001-6235-6246[3]
unesp.author.orcid0000-0003-0162-8273 0000-0003-0162-8273[5]
unesp.author.orcid0000-0003-4609-9002 0000-0003-4609-9002[6]
unesp.author.orcid0000-0002-1493-8118 0000-0002-1493-8118[7]
unesp.departmentFísica - FCpt

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