Monodisperse sub-10 nm Sc₂O₃: Yb, Er upconverting nanoparticles (UCNPs) were firstly synthesized via solvothermal method in three-neck round-bottom flask. The X-ray diffraction (XRD) shows that the prepared UCNPs possess cubic structure. The transmission electron microscopy (TEM) shows that sample has monodisperse spheroid morphology with high crystallinity. The average size of spheroid UCNPs could be controllable manipulated as small as 3 nm. Furthermore, the sample exhibits stronger red and green upconversion luminescence (UCL) than reported Sc₂O₃: Yb, Er nanostructure by biphasic solvothermal method. The Fourier-transform infrared (FTIR) spectra and decay curve reveal that ultra-small Sc₂O₃: Yb, Er UCNPs exhibit the reduced surface groups and long decay time of Er³⁺ ions. The results indicate Sc₂O₃: Yb, Er UCNPs is a probable oxide material with small size and intense UCL for biological applications.

首先通过溶剂热法在三颈圆底烧瓶中合成了亚分​​散的10 nm Sc ₂ O ₃：Yb，Er上转换纳米粒子（UCNPs）。X射线衍射（XRD）表明所制备的UCNP具有立方结构。透射电子显微镜（TEM）表明样品具有高结晶度的单分散球状形态。球状UCNP的平均大小可以控制在3 nm之内。此外，该样品显示出比报道的Sc ₂ O ₃：Yb，Er纳米结构强的红色和绿色上转换发光（UCL）。双相溶剂热法。傅立叶变换红外光谱和衰变曲线表明，超小Sc ₂ O ₃：Yb，Er UCNPs的表面基团减少，Er ³⁺离子的衰变时间长。结果表明，Sc ₂ O ₃：Yb，Er UCNPs是一种可能的氧化物材料，具有小尺寸和高强度的UCL，适合生物应用。