[19p-D63-1~7] 9.3 Nanoelectronics

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)English Presentation

[19p-D63-4] Trapping single-C₆₀ molecules in liquid by static sub-nm gap electrodes

Hongsen Qiu¹, Yue Tian², Xiaohang Qiao⁴, Kazuhiko Hirakawa^2,3, 〇Shaoqing Du^1,2 (1.SIMIT-CAS, 2.IIS, UTokyo, 3.INQIE, UTokyo, 4.UOL)

Keywords:

single molecule trapping,sub-nm gap

Understanding electron transports of a single molecules in liquid has attracted widespread attention due to its great significance in nanoelectronics and molecular dynamics. To date, scanning tunnelling microscopy break junction (STM-BJ) and mechanically controllable break junction (MCBJ) have been used to read single molecular conductance in liquid, demonstrating the feasibility of obtaining single-molecule information in sub-nm gap structures under mechanical dynamic strain. However, both methods necessitate the dynamic adjustment of the distance between the two electrodes, thereby incorporating the effect of the mechanical squeezing force induced by the electrodes on the molecules into the results. In order to obtain the properties of single molecules in a more natural state, it is necessary to develop a method of measuring the current flowing through the molecules without introducing electrode motion.
In this work, we use the static sub-nm gap electrodes to investigate single-C₆₀ molecular electron transports in liquid. We created a sub-nm gap in a gold nanojunction by using electromigration, and immerse it in a liquid cell. By measuring the current flow of the gold electrodes, we observed the conductance change due to single-molecule trapping.