Chemical Wiring and Soldering toward All-Molecule Electronic Circuitry

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• 作者：Yuji Okawa ; Swapan K. Mandal ; Chunping Hu ; Yoshitaka Tateyama ; Stefan Goedecker ; Shigeru Tsukamoto ; Tsuyoshi Hasegawa ; James K. Gimzewski ; Masakazu Aono
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：June 1, 2011
• 年：2011
• 卷：133
• 期：21
• 页码：8227-8233
• 全文大小：1117K
• 年卷期：v.133,no.21(June 1, 2011)
• ISSN：1520-5126

文摘

Key to single-molecule electronics is connecting functional molecules to each other using conductive nanowires. This involves two issues: how to create conductive nanowires at designated positions, and how to ensure chemical bonding between the nanowires and functional molecules. Here, we present a novel method that solves both issues. Relevant functional molecules are placed on a self-assembled monolayer of diacetylene compound. A probe tip of a scanning tunneling microscope is then positioned on the molecular row of the diacetylene compound to which the functional molecule is adsorbed, and a conductive polydiacetylene nanowire is fabricated by initiating chain polymerization by stimulation with the tip. Since the front edge of chain polymerization necessarily has a reactive chemical species, the created polymer nanowire forms chemical bonding with an encountered molecular element. We name this spontaneous reaction 鈥渃hemical soldering鈥? First-principles theoretical calculations are used to investigate the structures and electronic properties of the connection. We demonstrate that two conductive polymer nanowires are connected to a single phthalocyanine molecule. A resonant tunneling diode formed by this method is discussed.