A Ln^(3+)-doped(Yb^(3+),Tm^(3+)or Yb^(3+),Er^(3+)co-doped)NaYF4 nanoparticle/polystyrene hybrid fibrous membrane(HFM)was fabricated using an electrospinning technique.The HFM shows upconversion luminescence(UCL),flexi...A Ln^(3+)-doped(Yb^(3+),Tm^(3+)or Yb^(3+),Er^(3+)co-doped)NaYF4 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(~10μl).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.展开更多
细胞许多新陈代谢活动都伴随着离子浓度的改变,通过对离子浓度的检测可以间接检测细胞代谢状态。荧光共振能量转移技术(fluorescence resonance energy transfer,FRET)可以实现在活细胞内对离子浓度微弱变化的动态检测,为细胞离子代谢...细胞许多新陈代谢活动都伴随着离子浓度的改变,通过对离子浓度的检测可以间接检测细胞代谢状态。荧光共振能量转移技术(fluorescence resonance energy transfer,FRET)可以实现在活细胞内对离子浓度微弱变化的动态检测,为细胞离子代谢的可视化检测提供了有力工具。本文综述了FRET技术在离子浓度、离子通道以及膜电位检测方面的应用。展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.51402038,11474046 and 11274057)the Program for New Century Excellent Talents in University(NCET-13-0702)+5 种基金the Technology Foundation for Selected Overseas Chinese Scholars from the Ministry of Personnel of China,the Scientific Research Foundation for Doctors of Liaoning Province(Grant No.20141118)the Educational Committee Foundation of Liaoning Province(Grant No.L2014547)the Science and Technology Project of Liaoning Province(Grant No.2012222009)the Program for Liaoning Excellent Talents in University(LNET)(Grant No.LR2015016)the Science and Technique Foundation of Dalian(Grant Nos.2014J11JH134 and 2015J12JH201)the Fundamental Research Funds for Central Universities(Grant Nos.DC201502080203 and DC201502080304).
文摘A Ln^(3+)-doped(Yb^(3+),Tm^(3+)or Yb^(3+),Er^(3+)co-doped)NaYF4 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(~10μl).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.
文摘细胞许多新陈代谢活动都伴随着离子浓度的改变,通过对离子浓度的检测可以间接检测细胞代谢状态。荧光共振能量转移技术(fluorescence resonance energy transfer,FRET)可以实现在活细胞内对离子浓度微弱变化的动态检测,为细胞离子代谢的可视化检测提供了有力工具。本文综述了FRET技术在离子浓度、离子通道以及膜电位检测方面的应用。
