Hybrid Molecular-Junction Mapping Technique for Simultaneous Measurements of Single-Molecule Electronic Conductance and Its Corresponding Binding Geometry in a Tunneling Junction.,Analytical Chemistry

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Hybrid Molecular-Junction Mapping Technique for Simultaneous Measurements of Single-Molecule Electronic Conductance and Its Corresponding Binding Geometry in a Tunneling Junction.
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.analchem.9b05549
Haijian Chen ₁ , Yunchuan Li ₁ , Shuai Chang ₁

Affiliation

Improving the techniques for single-molecule conductance measurements is important for the progress of molecular electronics. In this report, a novel technique, which is named molecular-junction mapping (MJM) technique, is demonstrated to be able to simultaneously measure the electronic conductance of single molecules and their corresponding conformations in an electrode gap. Measured conductances of a few model molecules yield a much narrower distribution as compared with the results obtained using conventional break-junction technique, indicating that better defined metal-molecule contacts can be achieved using this new technique. In addition, multiple binding states of an alkanedithiol molecule in an electrode gap, which give rise to multiple conductance states, are efficiently revealed by this hybrid technique, with the results being consistent with those in former reports. This newly demonstrated technique opens up a new avenue for the study of single-molecule electronic properties and will instantly add significant assets to the tool library available for researchers in molecular electronics.

中文翻译：

同时测量隧道连接中单分子电子电导及其对应结合几何的混合分子连接映射技术。

改进单分子电导测量技术对分子电子学的发展至关重要。在此报告中，一种被称为分子连接映射（MJM）技术的新技术被证明能够同时测量电极间隙中单个分子的电子电导及其相应的构象。与使用常规断裂连接技术获得的结果相比，一些模型分子的电导测量结果产生的分布要窄得多，这表明使用这种新技术可以实现更好定义的金属分子接触。此外，通过这种混合技术可有效揭示电极间隙中链烷二硫醇分子的多种结合状态，从而产生多种电导状态，结果与以前的报告一致。这项新近展示的技术为研究单分子电子性质开辟了一条新途径，并将立即为可用于分子电子学研究人员的工具库增加重要资产。

更新日期：2020-04-02

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