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Control of topography, stress and diffusion at molecule–metal interfaces

Nikolai B Zhitenev1,5, Weirong Jiang1,2, Artur Erbe3, Zhenan Bao4, Eric Garfunkel2, Donald M Tennant1 and Raymond A Cirelli1

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The transport properties of metal–molecule–metal junctions containing a monolayer of conjugated and saturated molecules with characteristic dimensions in the range 30–300 nm are correlated with microscopic topography, stress and chemical bonding at the metal–molecule interfaces. Our statistically significant dataset allows us to conclude that the conductivity of organic molecules ~1.5 nm long is at least four orders of magnitude lower than is commonly believed.


PACS

73.63.-b Electronic transport in nanoscale materials and structures

68.37.-d Microscopy of surfaces, interfaces, and thin films

73.40.Rw Metal-insulator-metal structures

73.20.-r Electron states at surfaces and interfaces

73.40.Gk Tunneling

66.30.Pa Diffusion in nanoscale solids

Subjects

Surfaces, interfaces and thin films

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 5 (14 March 2006)

Received 14 October 2005

Published 7 February 2006



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