STUDIES OF THE ADSORPTION OF ACETONITRILE(CH3CN)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 03, 387-394

Abstract: The adsorption of acetonitrile(CH3CN)onCu(001)has been studied using elastic Helium atom scattering (HAS) and has been analyzed using a novel method of direct HAS diffraction image inversion. At low temperatures (138 K) acetonitrile permanently adsorbs forming ac(4 × 2)structure at saturation. Annealing the saturated surface to temperatures above 200 K causes the desorption of all surface moieties leaving cleanCu(001). At the adsorption temperatures in the range 153–163 K acetonitrile does not adsorb permanently and demonstrates adsorption–desorption equilibrium. These dynamical studies suggest that the acetonitrile molecule does not dissociate during adsorption. Analyses of thec(4 × 2)HAS diffraction image have revealed several possible surface structures where theC–C–Naxis of the adsorbed molecule lies approximately parallel to theCu(001)surface.

Keywords: Acetonitrile; CH3CN; copper; Cu(001); Helium atom scattering; Eikonal approximation; Patterson function; diffraction pattern deconvolution; molecular beam techniques; adsorption-desorption equilibrium (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1142/S0218625X07009621

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