单分子苯-1,4-二硫醇结中通过二硫键介导的二聚化的电学和表面增强拉曼散射检测
Electrical and SERS detection of disulfide-mediated dimerization in single-molecule benzene-1,4-dithiol junctions.
作者信息
Zheng Jueting, Liu Junyang, Zhuo Yijing, Li Ruihao, Jin Xi, Yang Yang, Chen Zhao-Bin, Shi Jia, Xiao Zongyuan, Hong Wenjing, Tian Zhong-Qun
机构信息
State Key Laboratory of Physical Chemistry of Solid Surfaces , College of Chemistry and Chemical Engineering , Pen-Tung Sah Institute of Micro-Nano Science and Technology , Graphene Industry and Engineering Research Institute , iChEM , Xiamen University , Xiamen 361005 , China . Email:
出版信息
Chem Sci. 2018 May 1;9(22):5033-5038. doi: 10.1039/c8sc00727f. eCollection 2018 Jun 14.
We applied a combination of mechanically controllable break junction (MCBJ) and surface enhanced Raman spectroscopy (SERS) methods to investigate the long-standing single-molecule conductance discrepancy of prototypical benzene-1,4-dithiol () junctions. Single-molecule conductance characterization, together with configuration analysis of the molecular junction, suggested that disulfide-mediated dimerization of contributed to the low conductance feature, which was further verified by the detection of S-S bond formation through SERS characterization. Control experiments demonstrated that the disulfide-mediated dimerization could be tuned the chemical inhibitor. Our findings suggest that a combined electrical and SERS method is capable of probing chemical reactions at the single-molecule level.
我们应用了机械可控断裂结（MCBJ）和表面增强拉曼光谱（SERS）相结合的方法，来研究典型的苯-1,4-二硫醇（）结长期存在的单分子电导差异。单分子电导表征以及分子结的构型分析表明，的二硫键介导的二聚化导致了低电导特征，通过SERS表征检测到S-S键形成进一步证实了这一点。对照实验表明，二硫键介导的二聚化可以通过化学抑制剂进行调节。我们的研究结果表明，电学和SERS相结合的方法能够在单分子水平上探测化学反应。
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