Zhu Yixuan, Zhou Yu, Ren Lu, Ye Jingyao, Wang Haichuan, Liu Xinyuan, Huang Ruiyun, Liu Haojie, Liu Junyang, Shi Jia, Gao Peng, Hong Wenjing
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
Laboratory for Advanced Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institute, Chinese Academy of Sciences, Xiamen, 361021, China.
Angew Chem Int Ed Engl. 2023 May 2;62(19):e202302693. doi: 10.1002/anie.202302693. Epub 2023 Mar 29.
The charge transport through single-molecule electronic devices can be controlled mechanically by changing the molecular geometrical configuration in situ, but the tunable conductance range is typically less than two orders of magnitude. Herein, we proposed a new mechanical tuning strategy to control the charge transport through the single-molecule junctions via switching quantum interference patterns. By designing molecules with multiple anchoring groups, we switched the electron transport between the constructive quantum interference (CQI) pathway and the destructive quantum interference (DQI) pathway, and more than four orders of magnitude conductance variation can be achieved by shifting the electrodes in a range of about 0.6 nm, which is the highest conductance range ever achieved using mechanical tuning.
通过原位改变分子几何构型，可机械控制单分子电子器件中的电荷传输，但其可调电导范围通常小于两个数量级。在此，我们提出了一种新的机械调谐策略，通过切换量子干涉模式来控制单分子结中的电荷传输。通过设计具有多个锚定基团的分子，我们在相长量子干涉（CQI）路径和相消量子干涉（DQI）路径之间切换电子传输，并且通过在约0.6纳米的范围内移动电极，可以实现超过四个数量级的电导变化，这是使用机械调谐迄今实现的最高电导范围。
