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Design and control of electron transport properties of single molecules

机译:单分子电子传输性质的设计与控制

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摘要

We demonstrate in this joint experimental and theoretical study how one can alter electron transport behavior of a single melamine molecule adsorbed on a Cu (100) surface by performing a sequence of elegantly devised and well-controlled single molecular chemical processes. It is found that with a dehydrogenation reaction, the melamine molecule becomes firmly bonded onto the Cu surface and acts as a normal conductor controlled by elastic electron tunneling. A current-induced hydrogen tautomerization process results in an asymmetric melamine tautomer, which in turn leads to a significant rectifying effect. Furthermore, by switching on inelastic multielectron scattering processes, mechanical oscillations of an N-H bond between two configurations of the asymmetric tautomer can be triggered with tuneable frequency. Collectively, this designed molecule exhibits rectifying and switching functions simultaneously over a wide range of external voltage.
机译:我们在这项联合的实验和理论研究中演示了如何通过执行一系列精心设计且控制良好的单分子化学过程来改变吸附在Cu(100)表面上的单个三聚氰胺分子的电子传输行为。发现通过脱氢反应,三聚氰胺分子牢固地键合在Cu表面上,并作为通过弹性电子隧穿控制的普通导体。电流诱导的氢互变异构过程导致不对称的三聚氰胺互变异构体,进而导致明显的整流作用。此外,通过开启非弹性多电子散射过程,可以以可调节的频率触发两个不对称互变异构体构型之间的N-H键机械振动。总的来说,这种设计的分子在很宽的外部电压范围内同时具有整流和开关功能。

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  • 作者单位

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

    Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrogen tautomerization; melamine molecules; rectifying effect; switching property;

    机译:氢互变异构三聚氰胺分子矫正效果;开关特性;

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