CaTiO3:Er3+:Yb3+ upconversion from 980 nm to 1550 nm excitation and its potential as cells luminescent probes
| Autor: | Sjl Ribeiro, Edison Pecoraro, Jefferson Luis Ferrari, R.V. Perrella, Paulo Henrique Almeida Campos-Junior, Marco Antônio Schiavon, I.C. Ribeiro |
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| Přispěvatelé: | Universidade Federal de Sergipe (UFS), Universidade Estadual Paulista (Unesp), Universidade Federal de Uberlândia (UFU) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Ytterbium
Materials science Analytical chemistry Nanoparticle chemistry.chemical_element Calcium titanate 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Photon upconversion 0104 chemical sciences Crystal chemistry Excited state Fluorescent cell dyeing General Materials Science Crystallite 0210 nano-technology Luminescence Excitation Erbium Upconversion |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2019-10-06T15:29:12Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-02-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) Financiadora de Estudos e Projetos CaTiO3:xEr3+:yYb3+ (x = 0.3mol%; y = 1.0, 1.5 and 2.0 mol%) was synthesized by the sol-gel process. Crystal phase purity, crystallite sizes and microstrain were evaluated as a function of rare earths concentration through XRD and SEM techniques. Upconversion (UC) spectra were recorded at 300 K under excitation at 980 nm and 1550 nm. The samples showed higher intensity of green emission assigned to the upconversion phenomena compared to the red one, when excited at 980 nm and the opposite was observed when excitation was performed at 1550 nm. The nanoparticles CaTiO3:Er3+:Yb3+ were successfully applied as animals cells cytoplasm staining luminescent probes, with low cytotoxic effect being observed. Er3+ emission at 1550 nm was also proposed for in vitro or in vivo optical imaging analysis in the so-called second window (1350–2300 nm). Grupo de Pesquisa em Química de Materiais (GPQM) Departamento de Ciências Naturais Universidade Federal de São João del Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio, 74, São João del Rei DeCrtamento de Ciências Naturais Universidade Federal de São João del Rei (UFSJ) Campus Dom Bosco, Praça Dom Helvécio, 74, São João del Rei UNESP Institute of Chemistry, P.O. Box 355 Desenvolvimento de Materiais Inorgânicos com Terras Raras (DeMITeR) Instituto de Química (IQ) Universidade Federal de Uberlândia (UFU), Av. João Naves de Ávila, 212, Uberlândia UNESP Institute of Chemistry, P.O. Box 355 FAPEMIG: CEX - RED-00010-14 |
| Databáze: | OpenAIRE |
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