基于碳电极的分子电子器件

Molecular Electronic Devices Based on Carbon Electrodes

基于分子的电子器件以分子的本征电子结构为器件单元,在分子水平上构筑电子器件,是跨越分子电荷传递机制研究的理想实验平台,也为在微纳尺度上实现新型功能电子器件提供了新颖的策略。实现微纳电极间隙及稳定的电极-分子的连接是开发重现性高的分子器件的关键。碳材料因其化学稳定性高、表面化学丰富而在分子器件的构筑中得到了越来越广泛的应用。本文总结回顾了以碳作为电极构筑分子器件的研究状况,讨论了碳材料在分子器件构筑中稳定性高、成本低和可量产等突出优势以及在大面积分子器件和单分子器件中的应用与研究进展。展示了以碳电极构筑的分子开关、分子整流等功能分子器件以及分子-电子传输构效关系等研究方面的丰富成果。最后分析了目前基于碳基分子器件研究面临的挑战,对碳电极-分子界面的化学连接、基于碳电极的分子器件的功能化以及未来分子器件的集成化做了展望。

Molecule-based electronic devices,using the intrinsic electronic structure of molecules as device units and constructing electronic devices at the molecular scale,serve as an ideal experimental platform for studying molecular charge transfer mechanisms.They also provide a novel strategy for achieving new functional electronic devices at the micro-nano scale.The realization of a micro-nano electrode gap and a reliable electrode-molecule connection are key factors in developing highly reproducible molecular devices.Carbon materials have been widely applied in the construction of molecular devices due to their remarkable chemical stability and abundant surface chemistry.This review summarizes the research status of using carbon as electrodes in molecular device construction,showcasing the prominent advantages of carbon materials,such as high stability,low cost,and scalability,as well as their applications and research progress in large-area molecular devices and single-molecule devices.The review presents a wealth of achievements in the construction of functional molecular devices,such as molecular switches and rectifiers,using carbon electrodes,as well as the study of the structure-performance relationship in molecular-electron transport.Lastly,this work analyzes the challenges currently faced in carbon-based molecular device research and provides prospects for the chemical connection of carbon electrode-molecular interface and functionalization of carbon-based molecular devices,as well as the integration of future molecular devices.