放射发光
镧系元素
激活剂(遗传学)
纳米颗粒
材料科学
掺杂剂
兴奋剂
发光
纳米技术
纳米材料
化学物理
化学
光电子学
光学
物理
闪烁体
离子
有机化学
基因
探测器
生物化学
作者
Steven L. Maurizio,Gabrielle A. Mandl,Micah D. Long,John A. Capobianco
标识
DOI:10.1021/acs.chemmater.2c02830
摘要
The rapid development of radioluminescent nanomaterials has left uncertainties in how their properties compare to bulk materials or other luminescent nanoparticles. The effects of material density and effective atomic number, activator concentration, co-doped sensitization, and core/shell architectures were examined, with a focus on LiLuF4 nanoparticles doped with Eu3+. Varying material density and effective atomic number were found to affect the exciton recombination efficiency and subsequent excitation of activator ions. Given the indirect excitation processes in radioluminescence, we observed that the dependence on dopant concentration is highly specific to the choice of the activator ion and host composition. Strategies to enhance the radioluminescence efficiency were explored through co-doping with a sensitizer ion or core/shell architectures. Demonstrated herein, co-doping is a viable strategy to improve radioluminescence; however, the effect is highly dependent on the sensitizer–activator ion combination, as well as the population efficiency of the sensitizer. Core/shell structures were effective in improving the efficiency of individual activator ions in the lattice; however, the enhancement may not compensate for the addition of nonluminescent shell material. The results provide insight on the development of radioluminescent nanoparticles and their relationship to the properties that govern other luminescence processes.
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