电化学2021，Vol.27Issue(2)：195-201,7.DOI:10.13208/j.electrochem.201243
电化学门控调节具有平行路径的单分子电路中电子传输
Electrochemical Gating Single-Molecule Circuits with Parallel Paths
摘要
Abstract
Electrochemical gating has emerged as a feasible and powerful method to tune single-molecule conductance.Herein,we demonstrate that the electron transport through single-molecule circuits with two benzene rings in parallel could be efficiently gated by electrochemistry.The molecular junctions with two parallel paths are fabricated with Au electrodes by STM break junction(STM-BJ)technique.Their conductance value exhibits a 2.82-fold enhancement by the constructive quantum interference compared to single-molecule junctions with single path for electron tunneling.Furthermore,the conductance of para-benzene based molecule could be electrochemically tuned with a modulation ratio of about 333％·V-1.With the help of DFT calculations,a V-shape spectra of energy-dependent transmission coefficients T(E)around E = EF leads to the conductance gating behavior.The current work sheds a light on the electrochemical gating of single-molecule circuits with parallel paths,and offers a new way to design molecular mate-rials for a high-performance molecular device.关键词
分子结/电化学门控/分子结构/ECSTM-BJ/增强性量子干涉Key words
molecular junctions/electrochemical gating/molecular structure/ECSTM-BJ/constructive quantum interference引用本文复制引用
苏俊青,周一帆,童凌,王亚浩,郑菊芳,陈竞哲,周小顺..电化学门控调节具有平行路径的单分子电路中电子传输[J].电化学,2021,27(2):195-201,7.基金项目
Financial support from the National Natural Science Foundation of China(No.21872126,)and the Zhejiang Provincial Natural Sci-ence Foundation of China(No.LQ21B030010). （No.21872126,）
