Layer-by-Layer Films with CoFe2O4Nanocrystals and Graphene Oxide as a Sensitive Interface in Capacitive Field-Effect Devices

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorFederal University of Triângulo Mineiro (UFTM)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorFH Aachen-
Autor(es): dc.contributorForschungszentrum Jülich-
Autor(es): dc.creatorMorais, Paulo V.-
Autor(es): dc.creatorOrlandi, Marcelo O.-
Autor(es): dc.creatorSchöning, Michael J.-
Autor(es): dc.creatorSiqueira, José R.-
Data de aceite: dc.date.accessioned2025-08-21T20:52:22Z-
Data de disponibilização: dc.date.available2025-08-21T20:52:22Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acsanm.2c00296-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/223761-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/223761-
Descrição: dc.descriptionSensor devices have proved to be a promising technology for portable microelectronic systems for biomedical and environmental applications. Depending on the target analyte and/or the sensor platform chosen, the study of (nano)materials and their ideal incorporation in the device as a receptor layer have great importance for developing sensing units with enhanced properties and performance. Here, we employed the layer-by-layer (LbL) technique to fabricate nanostructured films as sensing units for detecting H2O2 and heavy metal ions (Cd2+ and Cu2+). The LbL film was deposited on electrolyte-insulator-semiconductor (EIS) field-effect devices, combining CoFe2O4 nanocrystals embedded into polyallylamine hydrochloride (PAH) and graphene oxide (GO) as a PAH-CoFe2O4/GO structure. Scanning electron microscopy revealed a LbL film morphology with high surface area presenting heterogeneous clusters of nanocrystals covered by a homogeneous coating of GO. The electrochemical characterization to monitor the film growth and the sensing properties for detecting H2O2 and Cd2+ and Cu2+ ions was carried out by capacitance-voltage (C/V) and constant-capacitance (ConCap) measurements. The results demonstrated catalytic features in detection experiments for an optimized EIS-LbL sensor containing a 6-bilayer PAH-CoFe2O4/GO LbL film. This sensor system was sensitive for all analytes and exhibited a low limit of detection of ca. 314.3 µM for H2O2 and 0.54 and 0.47 µM for Cd2+ and Cu2+ ions, respectively. These findings prove the relevance of incorporating nanostructured films as a receptor layer to enhance sensing properties and may envisage a proof-of-concept field-effect sensor system for environmental applications.-
Descrição: dc.descriptionLaboratory of Applied Nanomaterials and Nanostructures (LANNA) Institute of Exact Sciences Natural and Education Federal University of Triângulo Mineiro (UFTM), MG-
Descrição: dc.descriptionInterdisciplinary Laboratory of Electrochemistry and Ceramics Chemistry Institute São Paulo State University, SP-
Descrição: dc.descriptionInstitute of Nano- and Biotechnologies (INB) FH Aachen Campus Jülich-
Descrição: dc.descriptionInstitute of Biological Information Processing (IBI-3) Forschungszentrum Jülich-
Descrição: dc.descriptionInterdisciplinary Laboratory of Electrochemistry and Ceramics Chemistry Institute São Paulo State University, SP-
Idioma: dc.languageen-
Relação: dc.relationACS Applied Nano Materials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCoFe2O4nanocrystals-
Palavras-chave: dc.subjectEIS sensors-
Palavras-chave: dc.subjectfield-effect devices-
Palavras-chave: dc.subjectgraphene oxide-
Palavras-chave: dc.subjectlayer-by-layer technique-
Palavras-chave: dc.subjectnanostructured films-
Título: dc.titleLayer-by-Layer Films with CoFe2O4Nanocrystals and Graphene Oxide as a Sensitive Interface in Capacitive Field-Effect Devices-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.