SUEP’s Professor Publishes First Paper in Nature Materials as Co-corresponding Author

     On February 11th, the paper titled “Anti-resonance Features of Destructive Quantum Interference in Single-molecule Thiopheme Junctions Achieved by Electrochemical Gating” (DOI:10.1038/s41563-018-0265-4) was published online in the journal of Nature Materials, aninternational top journal with the impact factor of 39.235, by Professor Chen Wenbo as the co-corresponding author, who is an Oriental Scholar of the College of Environmental and Chemical Engineering. It was the first time that our school’s professor had published a paper in the journal as the co-corresponding author. The research was jointly completed by the research group led by Professor Hong Wenjing of Xiamen University, the research group led by Professor Chen Wenbo of SUEP and the research group led by Professor Colin Lambert of Lancaster University.

    This research focuses on the quantum interference effect, which as a unique quantum phenomenon of charge transport in the nano- and sub-nanoscale, provides an important opportunity for manufacturing new sub-nanoscale electronic devices in the future. Besides, the tune of quantum interference also provides an important strategy for designing high-performance molecular devices. However, the fine tune of quantum interference still faces great challenges. In this work, the authors used an electrochemically gated, mechanically controllable break junction technique to tune the electronic behaviour of thiophene-based molecular junctions that show destructive quantum interference features. The conductance minimum was obtained by varying the voltage applied to the electrochemical gate at room temperature, which provides direct evidence of charge transport controlled by an anti-resonance arising from destructive quantum interference. Their molecular system enables conductance tuning close to two orders of magnitude within the non-faradaic potential region, which is significantly higher than that achieved with molecules not showing destructive quantum interference. And the experimental results can be further supported by theoretical calculations. This study demonstrates that electrochemical gating is a promising strategy for in-situ control over the electrical performance of interference-based molecular devices.

    The research work was supported by Shanghai “Oriental Scholars” Program, Pujiang Talent Program, Shanghai Municipal Natural Science Foundation, and the Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power.