Nanosized ZnGa2O4:Cr3+ Spinets as Highly Luminescent Materials for Bioimaging

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Paris Sud-
Autor(es): dc.creatorSilva, Marlon Nunes da-
Autor(es): dc.creatorCarvalho, Jose Miranda de-
Autor(es): dc.creatorAbreu Fantini, Marcia Carvalho de-
Autor(es): dc.creatorChiavacci, Leila Aparecida [UNESP]-
Autor(es): dc.creatorBourgaux, Claudie-
Data de aceite: dc.date.accessioned2022-02-22T00:14:53Z-
Data de disponibilização: dc.date.available2022-02-22T00:14:53Z-
Data de envio: dc.date.issued2020-12-10-
Data de envio: dc.date.issued2020-12-10-
Data de envio: dc.date.issued2019-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acsanm.9b01417-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/197563-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/197563-
Descrição: dc.descriptionIn the search for bright probes emitting in the red-to-near-IR region, in the biological transparency window where the absorption and diffusion of light by tissues and the autofluorescence are strongly reduced, Cr3+-doped zinc gallate (ZnGa2O4:Cr3+) spinels have recently attracted much interest because of their persistent luminescence. We present a novel aqueous route for the facile sol-gel synthesis of zinc gallate (ZnGa2O4) and Cr3+-doped zinc gallate nanospinels, with sizes smaller than 150 nm. The synthesis was performed at room temperature, and the obtained nanoparticles were then annealed at moderate temperatures (65, 350, and 700 degrees C). We have characterized the synthesized nanoparticles by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and proton-induced X-ray emission (PIXE). Their optical properties have been investigated. The luminescence of Cr3+ ions, centered at 700 nm, could be excited by wavelengths from UV to visible (250-580 nm). We have highlighted the crucial influence of the zinc gallate host structure on the excitation and emission spectra of Cr3+ ions. After annealing at 700 degrees C, these nanospinels also revealed a persistent luminescence, following an irradiation by UV (290 nm), blue (420 nm), or green-yellow (550 nm) light. UV irradiation was more effective for triggering persistent luminescence, characterized by fast and slow decay mechanisms. The depth of the traps responsible for this persistent luminescence was investigated by thermally stimulated luminescence.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniv Sao Paulo, Dept Fis Aplicada, BR-05508090 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista, Fac Ciencias Farmaceut, BR-14801902 Araraquara, SP, Brazil-
Descrição: dc.descriptionUniv Paris Sud, Fac Pharm, Inst Galien Paris Sud, F-92290 Chatenay Malabry, France-
Descrição: dc.descriptionUniv Estadual Paulista, Fac Ciencias Farmaceut, BR-14801902 Araraquara, SP, Brazil-
Descrição: dc.descriptionCAPES: 767-13-
Descrição: dc.descriptionFAPESP: 2017/05195-5-
Formato: dc.format6918-6927-
Idioma: dc.languageen-
Publicador: dc.publisherAmer Chemical Soc-
Relação: dc.relationAcs Applied Nano Materials-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectZnGa2O4-
Palavras-chave: dc.subjectZnGa2O4:Cr-3-
Palavras-chave: dc.subjectnew sol-gel synthesis-
Palavras-chave: dc.subjectred-to-near-IR emitting probes-
Palavras-chave: dc.subjectpersistent luminescence properties-
Palavras-chave: dc.subjectthermally stimulated luminescence-
Palavras-chave: dc.subjectstructure/properties relationship-
Título: dc.titleNanosized ZnGa2O4:Cr3+ Spinets as Highly Luminescent Materials for Bioimaging-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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