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Volume 117, 2000
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Controlling organic reactions on silicon surfaces with a scanning tunneling microscope: Theoretical and experimental studies of resonance-mediated desorption

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Abstract

The dynamics of tip-induced, resonance-mediated bond-breaking in complex organic adsorbates is studied theoretically and experimentally. Desorption of benzene from a Si(100) surface is found to be efficient and sensitive to voltage, the measured yield rising from below 10−10 to ca. 10−6 per electron within a ca. 0.8 V range at low (<100 pA) current. A theoretical model, based upon first principles electronic structure calculations and quantum mechanical wavepacket simulations, traces these observations to multi-mode dynamics triggered by a transition into a cationic resonance. The model is generalized to provide understanding of, and suggest a means of control over, the behaviour of different classes of organic adsorbates under tunneling current.

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Article information


Submitted
22 May 2000
First published
14 Aug 2000

Faraday Discuss., 2000,117, 213-229
Article type
Paper

Controlling organic reactions on silicon surfaces with a scanning tunneling microscope: Theoretical and experimental studies of resonance-mediated desorption

S. Alavi, R. Rousseau, G. P. Lopinski, R. A. Wolkow and T. Seideman, Faraday Discuss., 2000, 117, 213
DOI: 10.1039/B004093M

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