Work Function Changes Induced by Charged Adsorbates: Origin of the Polarity Asymmetry

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Article discussing work function changes induced by charged adsorbates and the origin of the polarity asymmetry.

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4 p.

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Bagus, Paul S.; Käfer, Daniel; Witte, Gregor & Wöll, Christof March 28, 2008.

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Article discussing work function changes induced by charged adsorbates and the origin of the polarity asymmetry.

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4 p.

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Copyright © 2008 American Physical Society. The following article appeared in Physical Review Letters, http://prl.aps.org/abstract/PRL/v100/i12/e126101

Abstract: A theoretical analysis of charged adsorbates on a metal surface reveals a pronounced polarity asymmetry between electropositive and electronegative species, thus reproducing a well known but so far not properly understood experimental fact. For ionic adsorbates on metal surfaces, the authors analyze the several, often canceling, terms that contribute to the change of the interface dipole and, hence, to work-function changes, ∆ϕ. The authors demonstrate that for the prototypic case of I on Cu(111) the magnitudes and the signs of these terms can be understood on the basis of their physical and chemical origins. An important consequence of their cancellation is that negatively charged adsorbates can lead to a paradoxical ∆ϕ < 0 rather than the expected ∆ϕ > 0.

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  • Physical Review Letters, 2008, College Park: American Physical Society

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  • Publication Title: Physical Review Letters
  • Volume: 100
  • Issue: 12
  • Peer Reviewed: Yes

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  • March 28, 2008

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  • April 2, 2012, 4:46 p.m.

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  • May 27, 2014, 4:51 p.m.

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Bagus, Paul S.; Käfer, Daniel; Witte, Gregor & Wöll, Christof. Work Function Changes Induced by Charged Adsorbates: Origin of the Polarity Asymmetry, article, March 28, 2008; [College Park, Maryland]. (digital.library.unt.edu/ark:/67531/metadc78321/: accessed July 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.