石墨烯
电极
分子
材料科学
断开连接
纳米技术
电导
整改
制作
分子电子学
富勒烯
光电子学
化学物理
化学
量子隧道
凝聚态物理
电压
物理
医学
病理
物理化学
量子力学
有机化学
替代医学
作者
K. Ullmann,Pedro B. Coto,Susanne Leitherer,Agustín Molina‐Ontoria,Nazario Martı́n,Michael Thoss,Heiko B. Weber
出处
期刊:Nano Letters
[American Chemical Society]
日期:2015-05-04
卷期号:15 (5): 3512-3518
被引量:76
标识
DOI:10.1021/acs.nanolett.5b00877
摘要
On the way to ultraflat single-molecule junctions with transparent electrodes, we present a fabrication scheme based on epitaxial graphene nanoelectrodes. As a suitable molecule, we identified a molecular wire with fullerene anchor groups. With these two components, stable electrical characteristics could be recorded. Electrical measurements show that single-molecule junctions with graphene and with gold electrodes display a striking agreement. This motivated a hypothesis that the differential conductance spectra are rather insensitive to the electrode material. It is further corroborated by the assignment of asymmetries and spectral features to internal molecular degrees of freedom. The demonstrated open-access graphene electrodes and the electrode-insensitive molecules provide a model system that will allow for a thorough investigation of an individual single-molecule contact with additional probes.
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