纳米晶
发光
兴奋剂
正交晶系
光子上转换
材料科学
透射电子显微镜
纳米颗粒
掺杂剂
六角相
分析化学(期刊)
光电子学
纳米技术
化学
晶体结构
结晶学
六方晶系
色谱法
作者
Haibo Wang,Wei Lü,Zhigao Yi,Ling Rao,Songjun Zeng,Zheng Li
标识
DOI:10.1016/j.jallcom.2014.08.174
摘要
In this paper, the monodispersed NaErF4:Yb, Mn nanoparticles (NPs) were successfully synthesized by a simple and mild solvothermal method. The as-prepared NPs were characterized by X-ray diffraction, transmission electron microscopy, and spectrophotometer. The crystal phase, size, morphology, and upconversion (UC) properties of these NPs can be readily tuned by doping Mn2+. With increasing Mn2+ contents, the crystal phase of NaErF4:Yb NPs was transferred from hexagonal to cubic, and then a new orthorhombic phase NaMn3F10 appeared. The morphology of NaErF4:Yb was tuned from nanodisks to nanocubes and then to large nanoflakes with increasing Mn2+ dopant contents. Moreover, the UC luminescence (UCL) intensity can be enhanced by increasing Mn2+ content. Interestingly, single-band red emission can be achieved when the Mn2+ content reaches 20%. This is mainly ascribed to the efficient energy transfer between Er3+ and Mn2+. The enhanced UCL intensity and single-band red UCL make these NaErF4:Yb/Mn NPs ideal probes for optical bioimaging owing to the low tissue absorption and deep tissue penetration of red light.
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