Nitrogen adsorption and thin surface nitrides on Cu(1 1 1) from first-principles

Aloysius Soon, Lindee Wong, Michael Lee, Mira Todorova, Bernard Delley, Catherine Stampfl

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Experimental studies of nitrogen adsorbed on a Cu(1 1 1) surface show that the surface layer undergoes a reconstruction to form a pseudo-(1 0 0) structure. We use ab initio techniques to demonstrate the theoretical stability of this reconstructed surface phase over a range of conditions. We systematically investigate the chemisorption of N on the Cu(1 1 1) surface, from 0.06 to 1 ML coverage. A peculiar atomic relaxation of N atoms for 0.75 ML is identified, which results in the formation of a (metastable) "N-trimer cluster" on the surface. We have also investigated surface nitride formation, as suggested from experiments. A surface nitride-like structure similar to the reported pseudo-(1 0 0) reconstruction is found to be highly energetically favored. Using concepts from "ab initio atomistic thermodynamics", we predict that this surface nitride exists for a narrow range of nitrogen chemical potential before the formation of bulk Cu3N.

Original languageEnglish
Pages (from-to)4775-4785
Number of pages11
JournalSurface Science
Volume601
Issue number21
DOIs
Publication statusPublished - 2007 Nov 1

Fingerprint

Nitrides
nitrides
Nitrogen
Adsorption
nitrogen
adsorption
trimers
Chemical potential
chemisorption
Chemisorption
surface layers
Thermodynamics
thermodynamics
Atoms
atoms

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Soon, Aloysius ; Wong, Lindee ; Lee, Michael ; Todorova, Mira ; Delley, Bernard ; Stampfl, Catherine. / Nitrogen adsorption and thin surface nitrides on Cu(1 1 1) from first-principles. In: Surface Science. 2007 ; Vol. 601, No. 21. pp. 4775-4785.
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Soon, A, Wong, L, Lee, M, Todorova, M, Delley, B & Stampfl, C 2007, 'Nitrogen adsorption and thin surface nitrides on Cu(1 1 1) from first-principles', Surface Science, vol. 601, no. 21, pp. 4775-4785. https://doi.org/10.1016/j.susc.2007.07.011

Nitrogen adsorption and thin surface nitrides on Cu(1 1 1) from first-principles. / Soon, Aloysius; Wong, Lindee; Lee, Michael; Todorova, Mira; Delley, Bernard; Stampfl, Catherine.

In: Surface Science, Vol. 601, No. 21, 01.11.2007, p. 4775-4785.

Research output: Contribution to journalArticle

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AU - Stampfl, Catherine

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