A three component-based van der Waals surface vertically designed for biomolecular recognition enhancement

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorFluminense Federal University – UFF-
Autor(es): dc.contributorand Technology of São Paulo-
Autor(es): dc.creatorHassan, Ayaz-
Autor(es): dc.creatorMacedo, Lucyano J.A.-
Autor(es): dc.creatorMattioli, Isabela A.-
Autor(es): dc.creatorRubira, Rafael J.G. [UNESP]-
Autor(es): dc.creatorConstantino, Carlos J.L. [UNESP]-
Autor(es): dc.creatorAmorim, Rodrigo G.-
Autor(es): dc.creatorLima, Filipe C.D.A.-
Autor(es): dc.creatorCrespilho, Frank N.-
Data de aceite: dc.date.accessioned2022-02-22T00:50:06Z-
Data de disponibilização: dc.date.available2022-02-22T00:50:06Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-04-20-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.electacta.2021.138025-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207386-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207386-
Descrição: dc.descriptionGraphene-based vertical electrodes may have applications in biomolecular recognition for producing low-cost biodevices with high electronic conductivity. However, they are unsuitable for measuring small interfacial capacitance variations because graphene is mostly composed of basal sp2 carbon surface, which limits its sensitivity as an electrochemical biosensor. Herein, we introduce a monolayer graphene based three-component vertically designed (TCVD) device composed of ferrocene adsorbed on monolayer graphene supported on lithographically designed gold subsurface on silicon wafer. Ferrocene is the top layer that promotes reversible redox communication with the electrolyte, while graphene–gold is the strategically projected layer underneath. This system exhibits an enhanced chemical reactivity by allowing the electrochemical attachment of the larger amount of the organic functional groups on its surface and faster electrochemical response to an inner-sphere redox probe in the solution. Bader charge analysis indicated that gold donates electronic density to the graphene surface, thereby significantly increases the charge transfer exchange rate with ferrocene. Based on density functional theory (DFT) simulation and spectromicroscopy data, it was realized that the interaction between gold and graphene is through physical adsorption with a slight change in the Fermi's level of graphene. The TCVD device was used to detect the adsorption of double-stranded DNA and DNA hybridization in solutions. Based on capacitance calculation measurements, DNA hybridization in nanomolar range with sensitivity four times higher and limit of detection (LOD) three times lower as compared to Fc/Gr/SiO2/Si, which was effortlessly detected. This result is promising since 3.0 µF cm−2 is the limit of quantum capacitance for bare graphene. Notably, these results open a new possibility for next-generation TCVD bioelectronics based on van der Waals surfaces, while further innovation and material scrutiny may lead to the achievement of TCVD devices with robust biomolecular recognition abilities.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)-
Descrição: dc.descriptionSão Carlos Institute of Chemistry University of São Paulo-
Descrição: dc.descriptionPhysics Department São Paulo State University-UNESP, Campus of Presidente Prudente-
Descrição: dc.descriptionPhysics Departament ICEx Fluminense Federal University – UFF, Volta Redonda-
Descrição: dc.descriptionFederal Institute of Education Science and Technology of São Paulo, Campus Matão-
Descrição: dc.descriptionPhysics Department São Paulo State University-UNESP, Campus of Presidente Prudente-
Descrição: dc.descriptionFAPESP: 18/22214-6-
Descrição: dc.descriptionFAPESP: 19/12053-8-
Descrição: dc.descriptionFAPESP: 19/15333-1-
Descrição: dc.descriptionFAPESP: 2017/20493-2-
Descrição: dc.descriptionFAPESP: 2018/11071-0-
Descrição: dc.descriptionCNPq: 2535/2017-1-
Descrição: dc.descriptionCNPq: 305486/2019-5-
Descrição: dc.descriptionCNPq: 428211/2018-6-
Descrição: dc.descriptionCNPq: 437182/2018-5-
Descrição: dc.descriptionCNPq: 88887.358060/2019-00-
Descrição: dc.descriptionFAPERJ: E-26/010.101126/201-
Descrição: dc.descriptionFAPERJ: E-26/202.699/2019-
Idioma: dc.languageen-
Relação: dc.relationElectrochimica Acta-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCapacitance-
Palavras-chave: dc.subjectDNA biosensor-
Palavras-chave: dc.subjectFerrocene-
Palavras-chave: dc.subjectGraphene-
Palavras-chave: dc.subjectVan der Waals surface-
Título: dc.titleA three component-based van der Waals surface vertically designed for biomolecular recognition enhancement-
Tipo de arquivo: dc.typelivro digital-
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