Controlled synthesis and upconversion luminescence properties of highly uniform and monodisperse β-NaYF4 :Yb3+ ,Tm3+ nanocrystals.
Ming ZhuMuhammad Azhar Hayat NawazNiu NiuJia RenNing LiuCong YuYunhui LiPublished in: Luminescence : the journal of biological and chemical luminescence (2021)
Ytterbium, thulium (Yb3+ ,Tm3+ ) co-doped β-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 β-NaYF4 :Yb3+ ,Tm3+ NCs provide us with highly efficient luminescent probes which can be applied for diverse bio-applications.
Keyphrases
- energy transfer
- electron microscopy
- quantum dots
- highly efficient
- induced apoptosis
- high resolution
- photodynamic therapy
- cell cycle arrest
- sensitive detection
- breast cancer cells
- small molecule
- radiation therapy
- magnetic resonance
- computed tomography
- deep learning
- signaling pathway
- convolutional neural network
- endoplasmic reticulum stress
- radiation induced
- machine learning
- oxidative stress
- density functional theory
- anaerobic digestion
- living cells
- ionic liquid
- data analysis
- solid state