[Chemical Science] Prof. Wenjing HONG & Prof. Zhongqun TIAN's groups published a paper entitled “Electrical and SERS detection of disulfide-mediated dimerization in single-molecule benzene-1,4-dithiol junctions”

Publish Date:2018-5-28     Visited64Times    bsp;  

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

Author: Jueting Zheng, Junyang Liu, Yijing Zhuo, Ruihao Li, Xi Jin, Yang Yang,* Zhao-Bin Chen, Jia Shi, Zongyuan Xiao, Wenjing Hong* and Zhong-qun Tian

Summary:

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.



Full Link:http://pubs.rsc.org/en/content/articlelanding/2018/sc/c8sc00727f#!divAbstract