Research articles
ScienceAsia 46 (2020): 691-696 |doi:
10.2306/scienceasia1513-1874.2020.093
Study of the surface structure of Fe quantum wire
prepared by electrochemical method in solution
Zhaoyun Yua, Yong Xiab, Xiaodong Donga,*
ABSTRACT: The surface structural characteristics of Fe quantum wires prepared by two electrochemical methods in
solution were studied by their conductance changes caused by the interactions between the quantum wires and specific
molecules. Once ascorbic acid was added into the solution, the conductance of the Fe junction decreased to a lower value
while for the dopamine adsorption, the conductance showed no obvious change. We proposed that there were some
iron(II) ions on the surface of atomic-scale Fe junction, not iron (replica Rolex III) ions, and these iron(II) ions played a significant role
for the conductance change. This mechanism was further enhanced by the following two experiments. When exposing
the quantum wire to sodium borohydride, the conductance increased to a higher value, and the conductance increase
was also observed with an electrochemical reduction process, which provided additional evidence for the proposed
mechanism.
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| a |
Medical College, Hebei University, Baoding 071002 China |
| b |
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese
Academy of Sciences, Changchun 130022 China |
* Corresponding author, E-mail: xddong@hbu.edu.cn
Received 6 Jul 2020, Accepted 18 Oct 2020
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