Formation and Evolution of Single-Molecule Junctions

被引：230

作者：

Kamenetska, M. ^{[1
,2
]}

koentopp, M. ^{[2
]}

Whalley, A. C. ^{[3
]}

Park, Y. S. ^{[3
]}

Steigerwald, M. L. ^{[2
,3
]}

Nuckolls, C. ^{[2
,3
]}

Hybertsen, M. S. ^{[4
]}

Venkataraman, L. ^{[1
]}

机构：

[1] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA

[2] Columbia Univ, Ctr Electron Transport Mol Nanostruct, New York, NY USA

[3] Columbia Univ, Dept Chem, New York, NY 10027 USA

[4] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 12期

基金：

美国国家科学基金会;

关键词：

BASIS-SETS; GOLD ATOMS; CONDUCTANCE; TRANSPORT; CIRCUITS; CONTACTS; RN;

D O I：

10.1103/PhysRevLett.102.126803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the formation and evolution statistics of single-molecule junctions bonded to gold electrodes using amine, methyl sulfide, and dimethyl phosphine link groups by measuring conductance as a function of junction elongation. For each link, the maximum elongation and formation probability increase with molecular length, strongly suggesting that processes other than just metal-molecule bond breakage play a key role in junction evolution under stress. Density functional theory calculations of adiabatic trajectories show sequences of atomic-scale changes in junction structure, including shifts in the attachment point, that account for the long conductance plateau lengths observed.

引用

页数：4

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