Accurate Investigation on the Fluorescence Resonance Energy Transfer between Single Organic Molecules and Monolayer WSe2 by Quantum Coherent Modulation-Enhanced Single-Molecule Imaging Microscopy
Accurate Investigation on the Fluorescence Resonance Energy Transfer between Single Organic Molecules and Monolayer WSe2 by Quantum Coherent Modulation-Enhanced Single-Molecule Imaging Microscopy
复制标题
量子相干调制增强单分子成像显微镜精确研究单个有机分子与单层WSe2之间的荧光共振能量转移
DOI：
10.1021/acs.jpclett.9b00854
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发表时间：
2019
影响因子：
5.7
通讯作者：
Jia Suotang
中科院分区：
文献类型：
--
作者：
Zhou Haitao;Qin Chengbing;Chen Ruiyun;Zhou Wenjin;Zhang Guofeng;Gao Yan;Xiao Liantuan;Jia Suotang
杂化有机二维（2D）材料异质结构以其加工成本低、优势互补等优点在光电领域受到广泛关注。然而，在单分子水平上对杂化异质结构界面的基本物理特性的准确理解仍未得到充分的探索。本文通过一种新开发的单分子显微镜技术——量子相干调制增强单分子成像显微镜（QCME-SMIM），研究了单有机分子与单层wse2之间的荧光共振能量转移（FRET）。结果表明，从巨大的荧光背景中成功提取了极弱的能量转移信号，该荧光背景是由单层WSe2的发射引起的。观察到的能量传递效率与ad - 4距离相关，杂化结构的Förster半径为~ 6 nm。我们的工作不仅在单分子水平上对这种混合有机-二维界面的FRET过程提供了有价值的见解，而且还证明了研究电子传递动力学基本物理的新开发技术的可行性。
Hybrid organic two-dimensional (2D) materials heterostructures are attracting tremendous attention for optoelectronic applications due to their low-cost processing and complementary advantages. However, accurate understanding of the fundamental physics on the interface of the hybrid heterostructures at the single-molecule level remains largely unexplored. Here, we investigated the fluorescence resonance energy transfer (FRET) between the single organic molecules and monolayer WSe2through a newly developed single molecule microscopy technique, quantum coherent modulation-enhanced single-molecule imaging microscopy (QCME-SMIM). It is shown that the extremely weak energy transfer signal was successfully extracted from the huge fluorescence background, originating from the emission of monolayer WSe2. The observed energy transfer efficiency is in agreement with ad–4distance dependence, with a Förster radius of ∼6 nm for the hybrid structures. Our work not only provides valuable insight into the FRET process at the single-molecule level across such hybrid organic-2D interfaces, but also demonstrates the feasibility of the newly developed technique for investigating the fundamental physics of electron transfer kinetics.