稀土掺杂反-斯托克斯RE-UCNPs机理与材料制备研究

Study on the Mechanism and Material Preparation of Rare Earth Doped Anti-Stokes Re-UCNPs

稀土掺杂反-斯托克斯RE-UCNPs材料作为生物分析化学领域新一代荧光纳米材料,具有典型的低生物毒性、高化学稳定性、窄带发射以及低背景荧光等特征。文章针对该类型材料发光机理进行分析,对RE-UCNPs材料上转换发光中的激发态吸收、能量转移上转换、光子雪崩、中间态能量转移上转换等能量交换方式作用机理进行总结;对水热法水相结合、水热法油相结合、热分解法、热合成法制备稀土掺杂反-斯托克斯RE-UCNPs过程进行综合论述。

As a new generation of fluorescent nanomaterials in the field of bioanalytical chemistry,rare earth doped anti-Stokes Re-UCNPs have typical characteristics of low biological toxicity,high chemical stability,narrow-band emission and low background fluorescence.This paper analyzes the luminescence mechanism of this type of materials,and summarizes the mechanism of energy exchange modes such as excited state absorption,energy transfer up conversion,photon avalanche and intermediate state energy transfer up conversion in the up-conversion luminescence of Re-UcNPs materials.The synthesis of rare earth doped anti-Stokes Re-UCNPs by hydrothermal method with water,hydrothermal method with oil,thermal decomposition method and thermal synthesis method is comprehensively discussed.