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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/64200
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dc.creatorLeonel Muniz Meirelespt_BR
dc.creatorBernardo Ruegger Almeida Nevespt_BR
dc.creatorLeonardo Cristiano Campospt_BR
dc.creatorRodrigo Gribel Lacerdapt_BR
dc.creatorEliel Gomes da Silva Netopt_BR
dc.creatorGustavo Arrighi Ferraript_BR
dc.creatorPaulo A. A. Nevespt_BR
dc.creatorAndreij de Carvalho Gadelhapt_BR
dc.creatorIve Silvestre de Almeidapt_BR
dc.creatorTakashi Taniguchipt_BR
dc.creatorKenji Watanabept_BR
dc.creatorHelio Chachampt_BR
dc.date.accessioned2024-02-19T15:24:01Z-
dc.date.available2024-02-19T15:24:01Z-
dc.date.issued2019-
dc.citation.volume6pt_BR
dc.citation.issue2pt_BR
dc.citation.spage1pt_BR
dc.citation.epage6pt_BR
dc.identifier.doihttps://doi.org/10.1002/aelm.201901167pt_BR
dc.identifier.issn2199-160Xpt_BR
dc.identifier.urihttp://hdl.handle.net/1843/64200-
dc.description.resumoA water-induced electromechanical response in suspended graphene atop a microfluidic channel is reported. The graphene membrane resistivity rapidly decreases to ≈25% upon water injection into the channel, defining a sensitive “channel wetting” device—a wetristor. The physical mechanism of the wetristor operation is investigated using two graphene membrane geometries, either uncovered or covered by an inert and rigid lid (hexagonal boron nitride multilayer or poly(methyl methacrylate) film). The wetristor effect, namely the water-induced resistivity collapse, occurs in uncovered devices only. Atomic force microscopy and Raman spectroscopy indicate substantial morphology changes of graphene membranes in such devices, while covered membranes suffer no changes, upon channel water filling. The results suggest an electromechanical nature for the wetristor effect, where the resistivity reduction is caused by unwrinkling of the graphene membrane through channel filling, with an eventual direct doping caused by water being of much smaller magnitude, if any. The wetristor device should find useful sensing applications in general micro- and nanofluidics.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.description.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)pt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE FÍSICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofAdvanced Functional Materials-
dc.rightsAcesso Restritopt_BR
dc.subjectGraphene on boron nitridept_BR
dc.subjectSuspended graphenept_BR
dc.subjectElectromechanicalpt_BR
dc.subjectWetristorpt_BR
dc.subject.otherGrafenopt_BR
dc.titleGraphene electromechanical water sensor: the wetristorpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://onlinelibrary.wiley.com/doi/full/10.1002/aelm.201901167pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6550-7804pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0464-4754pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6792-7554pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-4777-7370pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4658-3243pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0824-5622pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-6350-7680pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1467-3105pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-3701-8119pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5041-9094pt_BR
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