期刊
ACS NANO
卷 5, 期 5, 页码 4104-4111出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn200759s
关键词
molecular electronics; conductance measurement; inelastic electron tunneling spectroscopy; single-molecule junction; anchoring groups; density functional theory
类别
资金
- Deutsche Forschungsgemeinschaft
- Baden-Wurttemberg Stiftung within the Network of Excellence Functional Nanostructures
- Young Investigator Group
A combined experimental and theoretical analysis of the charge transport through single-molecule junctions Is performed to define the influence of molecular end groups for Increasing electrode separation. For both amine-ended and thiol-ended octanes contacted to gold electrodes, we study signatures of chain formation by analyzing kinks in conductance traces, the junction length, and inelastic electron tunneling spectroscopy. The results show that for amine-ended molecular junctions no atomic chains are pulled under stretching, whereas the Au electrodes strongly deform for thiol-ended molecular junctions. This advanced approach hence provides unambiguous evidence that the amine anchors bind only weakly to Au.
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