NaLuF4掺杂Tm^3+和Er^3+的X射线激发发光特性研究  

Synthesis of NaLuF Nanoparticles Doping with Tm or Er as X-ray Excited Luminescent Probes

作　　者：郑尧 李拓[1] 兰斌 卢虹冰 张文立 Zheng Yao;Li Tuo;Lan Bin;Lu Hongbing;Zhang Wenli(School of Biomedical Engineering,The Fourth Military Medical University,Xi'an 710000,China)

机构地区：[1]中国人民解放军空军军医大学军事生物医学工程学系,陕西西安710000

出　　处：《中国稀土学报》2020年第5期602-609,I0001,共9页Journal of the Chinese Society of Rare Earths

基　　金：科技部国家重点研发计划项目(2017YFC0107402);国家自然科学基金项目(31700865)资助。

摘　　要：基于NaREF4的纳米颗粒已经被广泛应用于X射线激发发光的相关应用,如X射线激发光动力学、 X射线激发光学断层成像等,但是目前的研究主要集中在掺杂Tb^3+和Eu^3+作为发光核心,鲜有对其他发光中心进行研究。采用油热法合成分别掺杂Tm^3+和Er^3+的NaLuF4类圆球形纳米颗粒,通过掺杂一定比例的Gd^3+进行粒径大小与均匀性调控。利用透射电镜、 X射线衍射分析确定了其粒径约为50 nm左右、球形呈六方相晶体结构。在X射线激发下,测试了其发光特性,并详细地对发光中心掺杂比例对发光强度的影响进行了系统的研究,当Tm^3+和Er^3+的掺杂比例分别为1%和0.75%时,该纳米颗粒的发光最强,并对其发光过程和机制进行了详细的分析。NaLuF4 nanoparticles were widely assessed as the upconversion host and the X-ray excited luminescent host. However, as an X-ray excited luminescent host, only Tb^3+ and Eu^3+ as luminescent centers were systematically studied. Consequently, using Tm^3+ and Er3+ as the dopant for X-ray excited luminescent emitting was investigated. In addition, Gd^3+ was doped as impurities for nanoparticles size and morphology control. With the assistance of TME and XRD, the morphology and crystalline phase of synthesized nanoparticles were systematically investigated. The influence of doping concentration of Tm^3+ or Er^3+ on the luminescent intensity was studied thoroughly. The optimized doping concentration of Tm^3+ and Er^3+ are 1% and 0.75%, respectively. The X-ray excited luminescent mechanism of such nanoparticles was also illustrated.

关 键 词：X射线激发发光纳米颗粒 NaLuF4 稀土金属掺杂 下转换发光 

分 类 号：O616[理学—无机化学]