Electrical and SERS detection of disulfide-mediated dimerization in single-molecule benzene-1,4-dithiol junctions

被引：67

作者：

Zheng, Jueting ^{[1
]}

Liu, Junyang ^{[1
]}

Zhuo, Yijing ^{[1
]}

Li, Ruihao ^{[1
]}

Jin, Xi ^{[1
]}

Yang, Yang ^{[1
]}

Chen, Zhao-Bin ^{[1
]}

Shi, Jia ^{[1
]}

Xiao, Zongyuan ^{[1
]}

Hong, Wenjing ^{[1
]}

Tian, Zhong-qun ^{[1
]}

机构：

[1] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Pen Tung Sah Inst Micronano Sci & Technol,iChEM, Coll Chem & Chem Engn,Graphene Ind & Engn Res Ins, Xiamen 361005, Peoples R China

来源：

CHEMICAL SCIENCE | 2018年 / 9卷 / 22期

基金：

国家重点研发计划; 中国国家自然科学基金; 中国博士后科学基金;

关键词：

SURFACE-ENHANCED RAMAN; CONTROLLABLE BREAK JUNCTION; METAL JUNCTIONS; CONDUCTANCE; 1,4-BENZENEDITHIOL; SCATTERING; BENZENEDITHIOL; ELECTRODES; SILVER; SWITCH;

D O I：

10.1039/c8sc00727f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We applied a combination of mechanically controllable break junction (MCBJ) and in situ surface enhanced Raman spectroscopy (SERS) methods to investigate the long-standing single-molecule conductance discrepancy of prototypical benzene-1,4-dithiol (BDT) junctions. Single-molecule conductance characterization, together with configuration analysis of the molecular junction, suggested that disulfide-mediated dimerization of BDT contributed to the low conductance feature, which was further verified by the detection of S-S bond formation through in situ SERS characterization. Control experiments demonstrated that the disulfide-mediated dimerization could be tuned via the chemical inhibitor. Our findings suggest that a combined electrical and SERS method is capable of probing chemical reactions at the single-molecule level.

引用

页码：5033 / 5038

页数：6

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