The mesoporous nanocrystalline CaF₂:Mn/Yb/Er/Si powder was obtained by pulsed electron beam evaporation (PEBE) method in a vacuum. The specific surface area (SSA) of the nanopowder (NP) reached a value of 296 m²/ g. The effect of thermal annealing in the air on the structural, textural, thermal, magnetic, and luminescent properties of CaF₂:Mn/Yb/Er/Si NPs has been studied. The NPs have demonstrated the dominant RED-NIR upconversion (UC) luminescence under the exposure to the 980-nm laser radiation. The paramagnetic properties of CaF₂:Mn/Yb/Er /Si NPs suggest the possibility of their use in magnetic resonance (MR) imaging. The annealing of NPs in the air has confirmed their high thermal stability in the temperature range from the room temperature (RT) to 400 °C. The developed NPs have a potential for the use as a trimodal agent in UC/MR/CT imaging in nanomedicine.

通过真空中的脉冲电子束蒸发（PEBE）方法获得介孔纳米晶CaF ₂：Mn / Yb / Er / Si粉末。纳米粉末（NP）的比表面积（SSA）达到296m ² / g的值。研究了在空气中进行热退火对CaF ₂：Mn / Yb / Er / Si NPs的结构，组织，热，磁和发光性质的影响。在暴露于980 nm激光辐射下，NPs已显示出主要的RED-NIR上转换（UC）发光。CaF ₂的顺磁性：Mn / Yb / Er / Si NPs提示将其用于磁共振（MR）成像的可能性。空气中NP的退火已证实其在室温（RT）至400°C的温度范围内具有很高的热稳定性。所开发的NP具有用作纳米药物的UC / MR / CT成像中的三峰剂的潜力。