skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: CO (a{sup 3}Π) quenching at a metal surface: Evidence of an electron transfer mediated mechanism

Abstract

We observe a strong influence of molecular vibration and surface temperature on electron emission promoted by the de-excitation of metastable CO(a{sup 3}Π) on a clean Au(111) surface using a molecular beam surface scattering apparatus. The de-excitation is independent of incidence translational energy. These observations appear incompatible with existing theories of metastable particle de-excitation on metal surfaces, which are based on the Auger effect. Instead, they strongly suggest a mechanism involving formation of a transient anion whose lifetime is similar to the vibrational period of the CO molecule.

Authors:
 [1];  [2];  [2]; ; ; ;  [1];  [2];  [3]
  1. Max-Planck-Institut Für Biophysikalische Chemie, Karl Friedrich-Bonhoeffer-Institut, Am Fassberg 11, 37077 Göttingen (Germany)
  2. (Germany)
  3. Fritz-Haber-Institut der Max-Planck-Gesellschaft, Abteilung Molekülphysik, Faradayweg 4-6, 14195 Berlin (Germany)
Publication Date:
OSTI Identifier:
22419959
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANIONS; AUGER EFFECT; CARBON MONOXIDE; DE-EXCITATION; ELECTRON EMISSION; METALS; MOLECULAR BEAMS; MOLECULES; PARTICLES; QUENCHING; SCATTERING; SURFACES

Citation Formats

Grätz, Fabian, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Abteilung Molekülphysik, Faradayweg 4-6, 14195 Berlin, Engelhart, Daniel P., Wagner, Roman J. V., Wodtke, Alec M., Schäfer, Tim, E-mail: tschaef4@gwdg.de, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, and Meijer, Gerard. CO (a{sup 3}Π) quenching at a metal surface: Evidence of an electron transfer mediated mechanism. United States: N. p., 2014. Web. doi:10.1063/1.4887777.
Grätz, Fabian, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Abteilung Molekülphysik, Faradayweg 4-6, 14195 Berlin, Engelhart, Daniel P., Wagner, Roman J. V., Wodtke, Alec M., Schäfer, Tim, E-mail: tschaef4@gwdg.de, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, & Meijer, Gerard. CO (a{sup 3}Π) quenching at a metal surface: Evidence of an electron transfer mediated mechanism. United States. doi:10.1063/1.4887777.
Grätz, Fabian, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Abteilung Molekülphysik, Faradayweg 4-6, 14195 Berlin, Engelhart, Daniel P., Wagner, Roman J. V., Wodtke, Alec M., Schäfer, Tim, E-mail: tschaef4@gwdg.de, Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen, and Meijer, Gerard. Mon . "CO (a{sup 3}Π) quenching at a metal surface: Evidence of an electron transfer mediated mechanism". United States. doi:10.1063/1.4887777.
@article{osti_22419959,
title = {CO (a{sup 3}Π) quenching at a metal surface: Evidence of an electron transfer mediated mechanism},
author = {Grätz, Fabian and Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen and Fritz-Haber-Institut der Max-Planck-Gesellschaft, Abteilung Molekülphysik, Faradayweg 4-6, 14195 Berlin and Engelhart, Daniel P. and Wagner, Roman J. V. and Wodtke, Alec M. and Schäfer, Tim, E-mail: tschaef4@gwdg.de and Georg-August-Universität Göttingen, Institut für Physikalische Chemie, Tammannstr. 6, 37077 Göttingen and Meijer, Gerard},
abstractNote = {We observe a strong influence of molecular vibration and surface temperature on electron emission promoted by the de-excitation of metastable CO(a{sup 3}Π) on a clean Au(111) surface using a molecular beam surface scattering apparatus. The de-excitation is independent of incidence translational energy. These observations appear incompatible with existing theories of metastable particle de-excitation on metal surfaces, which are based on the Auger effect. Instead, they strongly suggest a mechanism involving formation of a transient anion whose lifetime is similar to the vibrational period of the CO molecule.},
doi = {10.1063/1.4887777},
journal = {Journal of Chemical Physics},
number = 4,
volume = 141,
place = {United States},
year = {Mon Jul 28 00:00:00 EDT 2014},
month = {Mon Jul 28 00:00:00 EDT 2014}
}