Engineering single-molecule fluorescence with asymmetric nano-antennas.
Engineering single-molecule fluorescence with asymmetric nano-antennas.
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使用不对称纳米天线设计单分子荧光
DOI:
10.1038/s41377-021-00522-9
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发表时间:
2021-04-14
期刊:
影响因子:
--
通讯作者:
Tan YW
中科院分区:
文献类型:
--
作者:
Zhao W;Tian X;Fang Z;Xiao S;Qiu M;He Q;Feng W;Li F;Zhang Y;Zhou L;Tan YW
As a powerful tool for studying molecular dynamics in bioscience, single-molecule fluorescence detection provides dynamical information buried in ensemble experiments. Fluorescence in the near-infrared (NIR) is particularly useful because it offers higher signal-to-noise ratio and increased penetration depth in tissue compared with visible fluorescence. The low quantum yield of most NIR fluorophores, however, makes the detection of single-molecule fluorescence difficult. Here, we use asymmetric plasmonic nano-antenna to enhance the fluorescence intensity of AIEE1000, a typical NIR dye, by a factor up to 405. The asymmetric nano-antenna achieve such an enhancement mainly by increasing the quantum yield (to ~80%) rather than the local field, which degrades the molecules’ photostability. Our coupled-mode-theory analysis reveals that the enhancements stem from resonance-matching between antenna and molecule and, more importantly, from optimizing the coupling between the near- and far-field modes with designer asymmetric structures. Our work provides a universal scheme for engineering single-molecule fluorescence in the near-infrared regime.
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影响因子:
35
作者:
Kinkhabwala, Anika;Yu, Zongfu;Moerner, W. E.
通讯作者:
Moerner, W. E.
影响因子:
8.6
作者:
Qian, Gang;Dai, Bo;Wang, Zhi Yuan
通讯作者:
Wang, Zhi Yuan
影响因子:
3.7
作者:
Liu, Si-Yun;Huang, Lu;Li, Zhi-Yuan
通讯作者:
Li, Zhi-Yuan
影响因子:
10.8
作者:
Cang, Hu;Liu, Yongmin;Zhang, Xiang
通讯作者:
Zhang, Xiang
DOI:
10.1016/j.gpb.2015.08.002
发表时间:
2015-10
期刊:
Genomics, proteomics & bioinformatics
影响因子:
--
作者:
Rhoads A;Au KF
通讯作者:
Au KF