Filtration Shell Mediated Power Density Independent Orthogonal Excitations-Emissions Upconversion Luminescence
Filtration Shell Mediated Power Density Independent Orthogonal Excitations-Emissions Upconversion Luminescence
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DOI：
10.1002/anie.201510609
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发表时间：
2016-02-12
影响因子：
16.6
通讯作者：
Zhang, Fan
中科院分区：
文献类型：
--
作者：
Li, Xiaomin;Guo, Zhenzhen;Zhang, Fan
首次制备了具有功率密度无关的正交激发-发射上转换发光（UCL）的镧系元素掺杂核-多壳结构NaGdF4：Yb，Er@NaYF4：Yb@NaGdF4：Yb，Nd@NaYF4@NaGdF4：Yb，Tm@NaYF4纳米粒子。这些核-多壳结构纳米粒子的光学性质与NaGdF4:Yb,Tm层的吸收过滤效应有关。通过调节过滤层的厚度，纳米粒子可以表现出独特的两个独立的UCL组：在980 nm激发下的Tm3+突出的UV/蓝色（UV=紫外线）UCL和在796 nm激发下的Er3+突出的绿色/红色UCL。过滤壳介导的正交激发发射 UCL 与功率密度无关。作为概念验证，核-多壳纳米颗粒用于多维安全设计和成像引导的光动力联合化疗治疗。
Lanthanide doped core-multishell structured NaGdF4: Yb, Er@NaYF4: Yb@NaGdF4: Yb, Nd@NaYF4@NaGdF4: Yb, Tm@NaYF4 nanoparticles with power-density independent orthogonal excitations-emissions upconversion luminescence (UCL) were fabricated for the first time. The optical properties of these core-multishell structured nanoparticles were related to the absorption filtration effect of the NaGdF4: Yb, Tm layer. By tuning the thickness of the filtration layer, the nanoparticles can exhibit unique two independent groups of UCL: Tm3+ prominent UV/ blue (UV= ultraviolet) UCL under the excitation at 980 nm and Er3+ prominent green/red UCL under the excitation at 796 nm. The filtration-shell mediated orthogonal excitations-emissions UCL are powerdensity independent. As a proof of concept, the core-multishell nanoparticles are used in multi-dimensional security design and imaging-guided combined photodynamic therapy and chemotherapy.