Layer-by-layer assembly of NaYF4:Yb3+/Er3+ UCNPs@Cystein and UCNPs@Cys-Ab as hybrid bio-optical sensors for E. coli bacteria

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal do ABC (UFABC)-
Autor(es): dc.contributorde génie physique et d'optique-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorRamin, Beatriz B.S.-
Autor(es): dc.creatorSantos, Willy G.-
Autor(es): dc.creatorMessaddeq, Younès-
Autor(es): dc.creatorDeffune, Elenice-
Autor(es): dc.creatorMoraes, Marli L.-
Autor(es): dc.creatorRibeiro, Sidney J.L.-
Data de aceite: dc.date.accessioned2025-08-21T20:26:08Z-
Data de disponibilização: dc.date.available2025-08-21T20:26:08Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-07-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2024.120590-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/298509-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/298509-
Descrição: dc.descriptionAn innovative bio-optical Layer-by-Layer sensor was developed for the detection of Escherichia coli (E. coli) bacteria. This groundbreaking sensor utilizes upconversion NaYF4:Yb3+/Er3+ nanoparticles (UCNPs) that have been modified with cysteine (UCNPs@Cys) and E. coli antibodies (UCNPs@Cys-Ab). The optical sensing system employed Layer-by-Layer (LbL) films of UCNPs, harnessing the emission of rare earth nanoparticles to detect the presence or absence of E. coli. The incorporation of Ab into the UCNPs@Cys nanoparticle was confirmed through SEM-EDS imaging, resulting in the formation of aggregated UCNPs@Cys-Ab microparticles with an approximate diameter of 2 μm. To further analyze the sensing capability, Principal Component Analysis (PCA) was employed to examine the differences between the UCNPs@Cys and UCNPs@Cys-Ab sensors. The results indicated that the incorporation of antibodies to the optical system significantly enhanced sensor sensitivity. This improvement was evident in the expanded detection range, which spanned from 2 × 103–106 CFU/mL, and the remarkably low limit of detection (LOD) value of 34 CFU/mL. These findings highlight the extensive potential of the UCNPs@Cys-Ab as a sensor. Furthermore, it was demonstrated the sensor's enhanced sensitivity and broad detection range make it an invaluable tool for ensuring the well-being of communities by enabling effective management of potential E. coli contamination.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionMinistério da Ciência, Tecnologia e Inovação-
Descrição: dc.descriptionSão Paulo State University Institute of Chemistry, SP-
Descrição: dc.descriptionFederal University of ABC – UFABC, Av. dos Estados 5001, SP-
Descrição: dc.descriptionUnivertité Laval Département de physique de génie physique et d'optique-
Descrição: dc.descriptionSão Paulo State University Medical School Botucatu, SP-
Descrição: dc.descriptionFederal University of São Paulo Institute of Science and Technology, SP-
Descrição: dc.descriptionSão Paulo State University Institute of Chemistry, SP-
Descrição: dc.descriptionSão Paulo State University Medical School Botucatu, SP-
Descrição: dc.descriptionMinistério da Ciência, Tecnologia e Inovação: 382715/2022-5-
Idioma: dc.languageen-
Relação: dc.relationJournal of Luminescence-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBiosensor-
Palavras-chave: dc.subjectEscherichia coli-
Palavras-chave: dc.subjectLayer-by-Layer (LbL) films-
Palavras-chave: dc.subjectUpconversion nanoparticles-
Título: dc.titleLayer-by-layer assembly of NaYF4:Yb3+/Er3+ UCNPs@Cystein and UCNPs@Cys-Ab as hybrid bio-optical sensors for E. coli bacteria-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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