A flexible and superhydrophobic upconversion-luminescence membrane as an ultrasensitive fluorescence sensor for single droplet detection.

A flexible and superhydrophobic upconversion-luminescence membrane as an ultrasensitive fluorescence sensor for single droplet detection.
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柔性超疏水上转换发光膜作为超灵敏荧光传感器用于单液滴检测

DOI:
10.1038/lsa.2016.136
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发表时间:
2016-08
期刊:
Light, science & applications
影响因子:
--
通讯作者:
Dong B
Dong B
中科院分区:
其他
文献类型:
--
作者:
Liu KC;Zhang ZY;Shan CX;Feng ZQ;Li JS;Song CL;Bao YN;Qi XH;Dong B

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采用静电纺丝技术制备了一种镧离子(Ln³⁺)掺杂(镱离子(Yb³⁺)、铥离子(Tm³⁺)共掺杂或镱离子(Yb³⁺)、铒离子(Er³⁺)共掺杂)的氟化钇钠(NaYF₄)纳米粒子/聚苯乙烯杂化纤维膜(HFM)。该杂化纤维膜具有上转换发光(UCL)、柔韧性、超疏水性和可加工性。上转换发光膜可用作荧光传感器,从单个约10微升的水滴中检测生物信息。基于荧光共振能量转移,该传感器对生物分子亲和素和染料分子罗丹明B的检测限分别可达到1 ppb和10 ppb,优于先前研究中报道的大多数荧光传感器。在荧光检测之后,由于其超疏水特性,目标液滴很容易从UCL膜表面去除且无残留,这展现出了传统基于液体的检测系统无法实现的优异可回收性。
A Ln 3+-doped (Yb 3+, Tm 3+ or Yb 3+, Er 3+ co-doped) NaYF 4 nanoparticle/polystyrene hybrid fibrous membrane (HFM) was fabricated using an electrospinning technique. The HFM shows upconversion luminescence (UCL), flexibility, superhydrophobicity and processability. The UCL membrane can be used as a fluorescence sensor to detect bioinformation from a single water droplet (~ 10 μl). Based on the fluorescence resonance energy transfer, the detection limits of this sensor can reach 1 and 10 ppb for the biomolecule, avidin, and the dye molecule, Rhodamine B, respectively, which are superior to most of the fluorescence sensors reported in previous works. After the fluorescence detection, the target droplet was easily removed without residues on the UCL membrane surface due to its superhydrophobic property, which exhibits an excellent recyclability that cannot be achieved by traditional liquid-based detection systems.
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