Liu Kui-Chao, Zhang Zhen-Yi, Shan Chong-Xin, Feng Zhi-Qing, Li Jia-Su, Song Chun-Lei, Bao Ya-Nan, Qi Xiao-Hui, Dong Bin
Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Dalian Nationalities University, 18 Liaohe West Road, Dalian 116600, China.
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Light Sci Appl. 2016 Aug 12;5(8):e16136. doi: 10.1038/lsa.2016.136. eCollection 2016 Aug.
A Ln-doped (Yb, Tm or Yb, Er co-doped) NaYF 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.
采用静电纺丝技术制备了一种镧系掺杂（镱、铥或镱、铒共掺杂）的纳米氟化钠/聚苯乙烯混合纤维膜（HFM）。该HFM具有上转换发光（UCL）、柔韧性、超疏水性和可加工性。这种UCL膜可用作荧光传感器，以检测来自单个水滴（约10μl）的生物信息。基于荧光共振能量转移，该传感器对生物分子抗生物素蛋白和染料分子罗丹明B的检测限分别可达1和10 ppb，优于先前报道的大多数荧光传感器。荧光检测后，由于其超疏水特性，目标液滴很容易被去除，且UCL膜表面无残留，这显示出传统基于液体的检测系统无法实现的优异可回收性。
