Carbon Electrode鈥揗olecule Junctions: A Reliable Platform for Molecular Electronics

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• 作者：Chuancheng Jia ; Bangjun Ma ; Na Xin ; Xuefeng Guo
• 刊名：Accounts of Chemical Research
• 出版年：2015
• 出版时间：September 15, 2015
• 年：2015
• 卷：48
• 期：9
• 页码：2565-2575
• 全文大小：754K
• ISSN：1520-4898

文摘

The development of reliable approaches to integrate individual or a small collection of molecules into electrical nanocircuits, often termed 鈥渕olecular electronics鈥? is currently a research focus because it can not only overcome the increasing difficulties and fundamental limitations of miniaturization of current silicon-based electronic devices, but can also enable us to probe and understand the intrinsic properties of materials at the atomic- and/or molecular-length scale. This development might also lead to direct observation of novel effects and fundamental discovery of physical phenomena that are not accessible by traditional materials or approaches. Therefore, researchers from a variety of backgrounds have been devoting great effort to this objective, which has started to move beyond simple descriptions of charge transport and branch out in different directions, reflecting the interdisciplinarity. This Account exemplifies our ongoing interest and great effort in developing efficient lithographic methodologies capable of creating molecular electronic devices through the combination of top-down micro/nanofabrication with bottom-up molecular assembly. These devices use nanogapped carbon nanomaterials (such as single-walled carbon nanotubes (SWCNTs) and graphene), with a particular focus on graphene, as point contacts formed by electron beam lithography and precise oxygen plasma etching. Through robust amide linkages, functional molecular bridges terminated with diamine moieties are covalently wired into the carboxylic acid-functionalized nanogaps to form stable carbon electrode鈥搈olecule junctions with desired functionalities.