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

Description:

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

Creator(s):
Creation Date: March 28, 2008
Partner(s):
UNT College of Arts and Sciences
Collection(s):
UNT Scholarly Works
Usage:
Total Uses: 372
Past 30 days: 6
Yesterday: 1
Creator (Author):
Bagus, Paul S.

University of North Texas

Creator (Author):
Käfer, Daniel

Ruhr-Universität Bochum

Creator (Author):
Witte, Gregor

Ruhr-Universität Bochum

Creator (Author):
Wöll, Christof

Ruhr-Universität Bochum

Publisher Info:
Publisher Name: American Physical Society
Place of Publication: [College Park, Maryland]
Date(s):
  • Creation: March 28, 2008
Description:

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

Degree:
Department: Physics
Note:

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

Note:

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.

Physical Description:

4 p.

Language(s):
Subject(s):
Keyword(s): adsorbates | polarity asymmetry | interface dipole
Source: Physical Review Letters, 2008, College Park: American Physical Society
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1103/PhysRevLett.100.126101 |
  • ARK: ark:/67531/metadc78321
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: Physical Review Letters
Volume: 100
Issue: 12
Peer Reviewed: Yes