Uniform NaLuF4 nanoparticles with strong upconversion luminescence for background-free imaging of plant cells and ultralow power detecting of trace organic dyes
Uniform NaLuF4 nanoparticles with strong upconversion luminescence for background-free imaging of plant cells and ultralow power detecting of trace organic dyes
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具有强上转换发光的均匀 NaLuF4 纳米粒子，用于植物细胞的无背景成像和痕量有机染料的超低功率检测
DOI：
10.1016/j.materresbull.2015.08.020
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发表时间：
2016-01-01
影响因子：
5.4
通讯作者：
Liu, Yunxin
中科院分区：
文献类型：
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作者：
Hu, Shigang;Wu, Xiaofeng;Liu, Yunxin
成功合成了Yb 3+和Er 3 +/Tm 3+共掺杂的NaLuF 4上转换纳米粒子（UCNPs），在红外光激发下具有较强的可见光发射。合成的NaLuF 4上转换纳米晶具有酸性配体，能快速捕获碱性染料，形成UCNPs@染料纳米体系，在该体系中，可以观察到UCNPs到染料的高效发光共振能量转移（LRET）。我们选择NaLuF 4：Yb 3 +/Er 3 + UCNPs作为检测植物细胞中罗丹明B（RB）的模型。NaLuF 4：Yb 3 +/Er 3 + UCNP可以发射波长近似为545 nm的绿色光，而RB可以有效地吸收波长近似为545 nm的绿色光以发射610 nm的红光。结果表明，在NaLuF_4：Yb ~（3+）/Er ~（3+）@RB体系中可以发生LRET过程。基于DIET过程，在检测植物细胞中痕量RB时，可实现60 μ W的激发功率极限。该LRET过程也用于检测荧光素钠，激发功率极限为65 μ W。(C)2015爱思唯尔有限公司版权所有。
Yb3+ and Er3+/Tm3+ co-doped NaLuF4 upconversion nanoparticles (UCNPs) with strong visible luminescence under the excitation of infrared light are successfully synthesized. The synthesized NaLuF4 upconversion nanorystals have acidic ligand and can quickly capture the basic dyes to form UCNPs@dye nanosystem, in which the efficient luminescence resonance energy transfer (LRET) can be observed from UCNPs to dyes. We select NaLuF4:Yb3+/Er3+ UCNPs as a model to detect Rhodamine B (RB) in plant cells. NaLuF4:Yb3+/Er3+ UCNPs can emit green light at the wavelength of similar to 545 nm while RB can efficiently absorb the green light of similar to 545 nm to emit red light of 610 nm. As a result, the LRET process can occur in NaLuF4:Yb3+/Er3+@RB system. Based on the DIET process, an excitation power limit of 60 mu W can be achieved in detecting traces of RB in plant cells. This LRET process is also used for detecting sodium fluorescein with the excitation power limit of 65 mu W. (C) 2015 Elsevier Ltd. All rights reserved.