STUDIES OF THE ADSORPTION OF CYANOGEN(C2N2)ONCu(001)USING HELIUM ATOM SCATTERING

I. G. Shuttleworth ()
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I. G. Shuttleworth: Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, NJ 08854, USA

Surface Review and Letters (SRL), 2007, vol. 14, issue 05, 863-872

Abstract: The adsorption of cyanogen(C2N2)onCu(001)has been investigated using helium atom scattering. Adsorption at 263 K produces a two domain structure with periodicity c(10 × 6) and symmetry c2 mm. The principle axes of the two domains in the c(10 × 6) pattern lie at right angles to one another. Adsorption at lower temperatures (163 K) produces a disordered structure with no observable diffraction features other than the specular. Annealing the disordered phase to 263 K does not produce an ordered structure. Cooling the ordered structure from 263 K to 163 K produces an enhancement of the diffraction features consistent with the Debye–Waller effect but no disruption of the c(10 × 6) periodicity. Annealing the ordered structure shows that the structure remains stable at temperatures up to 373 K. Analysis of the in-plane diffraction features suggests a reconstruction of theCu(001)substrate consistent with the 2D Frenkel–Kontorova model for overlayer strain relief.

Keywords: Cyanogen; C2N2; copper; Cu(001); helium atom scattering; Eikonal approximation; Patterson function; diffraction pattern deconvolution; molecular beam techniques; Frenkel-Kontorova (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07010330

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