Controlled synthesis and upconversion luminescence properties of highly uniform and monodisperse ß-NaYF4 :Yb3+ ,Tm3+ nanocrystals.
Luminescence
; 36(4): 1056-1062, 2021 Jun.
Article
em En
| MEDLINE
| ID: mdl-33608953
ABSTRACT
Ytterbium, thulium (Yb3+ ,Tm3+ ) co-doped ß-NaYF4 upconversion nanocrystals (U-NCs) were synthesized by a convenient hydrothermal method using sodium citrate as a capping agent. X-ray diffraction (XRD) analysis revealed that NCs phase structures were dependent on reaction time. Field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) results showed that the morphology of U-NCs could be controlled by adjusting the concentration of sodium citrate added in the hydrothermal reaction. Moreover, the emission spectra of the U-NCs were investigated to evaluate upconversion efficiency. Strong luminescence intensity of the U-NCs was observed after tuned with optimized concentration of sodium citrate. Furthermore, the U-NCs were incubated with MCF-7 cells at 37°C for 24 h. Under irradiation of a 980 nm laser, the upconversion blue emission of the NCs in MCF-7 cells can be clearly observed through a confocal microscope with an upconversion imaging system and high quality upconversion luminescence images can be acquired. Thus, prepared ß-NaYF4Yb3+ ,Tm3+ NCs provide us with highly efficient luminescent probes which can be applied for diverse bio-applications.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Luminescência
/
Nanopartículas
Idioma:
En
Revista:
Luminescence
Assunto da revista:
BIOFISICA
/
BIOQUIMICA
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China