| Texto completo | |
| Autor(es): |
Passini, Luan N.
;
Maturi, Fernando E.
;
Pugina, Roberta S.
;
Hilario, Eloisa G.
;
Fontes, Marina
;
Barud, Hernane S.
;
Carlos, Luis D.
;
Caiut, Jose Mauricio A.
;
Manzani, Danilo
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF MATERIALS CHEMISTRY C; v. 11, n. 23, p. 10-pg., 2023-05-24. |
| Resumo | |
Selecting a suitable host matrix to perform temperature sensing in biomedical applications requires low cytotoxicity, facile synthesis, and an ability to be doped with light-emitting ions. With this perspective, indium-based halide double perovskites, specifically Cs2AgIn0.9Bi0.1Cl6, Cs2Ag0.6Na0.4InCl6, and Cs2Ag0.6Na0.4In0.9Bi0.1Cl6, were chosen as host materials to develop lanthanide-based primary thermometers due to their low phonon energy and ease of synthesis. The incorporation of Na+ and Bi3+ into the perovskite cubic crystal lattice was confirmed by X-ray diffraction and Raman spectroscopy while the optical properties of both the undoped and Yb3+/Er3+ co-doped perovskites were assessed by diffuse reflectance and photoluminescence spectroscopies. The obtained perovskite samples demonstrated excellent thermal stability, with the ability to withstand temperatures as high as 500 degrees C. A temperature-dependent green emission of Er3+ was observed in the co-doped samples upon 980 nm irradiation, yielding a relative thermal sensitivity and uncertainty in temperature values of 1.3% K-1 and 0.3 K, respectively. Incorporating the obtained perovskites (0.05 to 0.20 mg mL(-1)) into L2929 cells as an in vitro model resulted in high cell viability, underscoring the benefits of selecting such a low-cytotoxicity material for applications in biological media. (AU) | |
| Processo FAPESP: | 21/08111-2 - Materiais conversores de luz à base de terras raras: marcadores luminescentes, sensores e amplificadores ópticos |
| Beneficiário: | Hermi Felinto de Brito |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/18828-1 - Materiais nano e/ou submicroparticulados à base de íons lantanídeos com potencial aplicação em fotônica |
| Beneficiário: | José Maurício Almeida Caiut |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/16126-7 - Vidros opticamente ativos para aplicações fotônicas: síntese, caracterização e aplicação de vidros óxidos contendo quantum dots. |
| Beneficiário: | Danilo Manzani |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |