The reporter learned from Xiamen University on the 20th that the team of Hong Wenjing, the State Key Laboratory of Solid Surface Physics and Chemistry, and the team of Professor Colin Lambert of Lancaster University in the United Kingdom and Chen Wenbo of Shanghai University of Electric Power cooperated to discover the single-molecule electrochemical transistor for the first time in the world. The quantum interference effect of medium electrons, on this basis, a high-performance single-molecule electrochemical transistor based on quantum effect is prepared, which provides a new idea for the current computer chip to break through the physical limit of silicon-based semiconductor devices. The research results were published online in the journal Nature.
At present, the miniaturization of functional electronic devices has become an important trend in the development of information technology. With the development of the semiconductor industry, the integration of transistors on integrated circuit chips is getting higher and smaller, the size is getting smaller and smaller, and the chip is running faster and faster. However, the size of traditional silicon-based transistors has reached a bottleneck. To further reduce the size of transistors, replacing silicon as a transistor material based on a single organic molecule has become a potential technical solution for miniaturization of electronic devices. At present, the switching ratio of single molecule transistors is generally low, which seriously restricts the performance of the device.
According to Professor Hong Wenjing, in a single-molecule device, when electrons pass through different electrical transport paths in the single-molecule device, there is an enhanced or destructive quantum interference effect due to the phase difference. This is at the nano-sub-nanometer scale. Unique effects. In the case of similar molecular structures, molecules with destructive quantum interference effects may have orders of magnitude difference in electron transport capability compared to molecules without destructive quantum interference effects.
The team realized for the first time in the research the chip technology and scientific instrument method of single-molecule electronic devices that can integrate electrochemical gating, and the first direct observation of the anti-resonance phenomenon of quantum interference effects in single-molecule electronic devices at room temperature. And regulation, a single-molecule electrochemical transistor with a switching ratio tens of times higher than the traditional single-molecule transistor is obtained, which is of great significance for the preparation of new molecular materials and devices based on quantum interference effect. (Reporter Xie Kaifei Correspondent Ouyang Guilian)
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