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:
影响因子:
--
通讯作者:
Dong B
中科院分区:
文献类型:
--
作者:
Liu KC;Zhang ZY;Shan CX;Feng ZQ;Li JS;Song CL;Bao YN;Qi XH;Dong B
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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