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Vibrational mode specific bond dissociation in a single molecule

J. Chem. Phys. 131, 044706 (2009); doi:10.1063/1.3187940

Published 24 July 2009

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J. R. Hahn1 and W. Ho2
1Department of Chemistry and Institute of Photonics and Information Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea
2Department of Physics and Astronomy and Department of Chemistry, University of California, Irvine, California 92697-4575, USA
Tunneling electrons from a scanning tunneling microscope were used to image and dissociate single O2-water-O complexes adsorbed on a Ag(110) surface at 13 K. The dissociation rate was measured as a function of the energy and current of the tunneling electrons; an increase was found in this rate by a factor of ~100 at an electron energy equivalent to that of the O–H (D) stretch vibration. These results indicate that the rate of bond dissociation is competitive with the other energy dissipation pathways of the stretch vibration. The barrier to the dissociation of the water molecules is lowered by the formation of hydrogen bonds with oxygen species. ©2009 American Institute of Physics
History: Received 18 May 2009; accepted 7 July 2009; published 24 July 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/044706/1
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KEYWORDS and PACS

Keywords
PACS
  • 82.30.Lp
    Decomposition chemical reactions (pyrolysis, dissociation, and fragmentation)
  • 79.20.Rf
    Atomic, molecular and ion beam impact and interactions with surfaces
  • 68.37.Ef
    Scanning tunneling microscopy of surfaces, interfaces and thin films
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

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