Characteristics of Amine-Ended and Thiol-Ended Alkane Single-Molecule Junctions Revealed by Inelastic Electron Tunneling Spectroscopy

被引：85

作者：

Kim, Youngsang ^{[1
]}

Hellmuth, Thomas Julian ^{[2
]}

Buerkle, Marius ^{[2
]}

Pauly, Fabian ^{[2
]}

Scheer, Elke ^{[1
]}

机构：

[1] Univ Konstanz, Dept Phys, D-78457 Constance, Germany

[2] Karlsruhe Inst Technol, Inst Theoret Festkorperphys, D-76131 Karlsruhe, Germany

来源：

ACS NANO | 2011年 / 5卷 / 05期

关键词：

molecular electronics; conductance measurement; inelastic electron tunneling spectroscopy; single-molecule junction; anchoring groups; density functional theory; CHARGE-TRANSPORT; ANCHORING GROUPS; METAL JUNCTIONS; CONDUCTANCE; GOLD; APPROXIMATION; CIRCUITS; DEVICES; ENERGY;

D O I：

10.1021/nn200759s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：4104 / 4111

页数：8

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