CHARACTERIZATION OF SURFACE DEFECTS THROUGH THE MODIFICATION OF THE INFRARED PROFILE OF ADMOLECULES: APPLICATION TOCOMOLECULES ADSORBED ON (100)MgOANDNaClSURFACES

Hanen Zorgati, Moncef Said, Christophe Ramseyer and Claude Girardet
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Hanen Zorgati: Département de Physique, Université de Monastir, Faculté des Sciences de Monastir, UR 1319, Monastir, Tunisia
Moncef Said: Département de Physique, Université de Monastir, Faculté des Sciences de Monastir, UR 1319, Monastir, Tunisia
Christophe Ramseyer: Laboratoire de Physique Moléculaire, UMR 6624, Université de Franche-Comté, 25030 Besançon, France
Claude Girardet: Laboratoire de Physique Moléculaire, UMR 6624, Université de Franche-Comté, 25030 Besançon, France

Surface Review and Letters (SRL), 2010, vol. 17, issue 04, 431-436

Abstract: Real surfaces display defects originating either from thermodynamic principles or from local instabilities. In order to help and characterize these surfaces and their defects, infrared spectroscopy of physisorbed test molecules can be used. As an example, we study the behavior of the infrared response ofCOmolecules randomly deposited on ionic surfaces ofMgOandNaClwith the concentration of dipolar defects randomly distributed on these surfaces. The vibrational peak is shifted and asymmetrically broadened when the defect concentration increases as a result of surface inhomogeneity, in semi-quantitative agreement with experimental data.

Keywords: Surface defects; probe molecule; infrared spectroscopy (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X1001420X

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