Understanding the initial stages of polymer grafting on metals: A photoelectron spectroscopy study of acrylonitrile adsorption on transition metal surfaces

Crispin, XavierLinköpings universitet,Tekniska högskolan,Institutionen för teknik och naturvetenskap (author)

Understanding the initial stages of polymer grafting on metals : A photoelectron spectroscopy study of acrylonitrile adsorption on transition metal surfaces

X-ray and UV photoelectron spectroscopies show that acrylonitrile is chemisorbed on iron, nickel and copper polycrystalline surfaces via the carbon and nitrogen atoms. Depending on the conditions used, different adsorption geometries are found. The molecules can either be adsorbed flat on the surface and chemically bound by a (2pp)-(3d/4s) overlap via both the C=C double bond and the C=N nitrile group or they can be adsorbed perpendicular to the surface via a covalent interaction between the nitrogen lone pair and the 3d-4s levels of the metals. Analysis of the XPS data obtained on molecular mono-layers chemisorbed on metal surfaces emphasizes the importance of initial-state effects (charge transfer upon chemisorption, contribution of the metal surface dipole) and final-state effects (metal screening and polarization effect within the mono-layer). The correlation between the XPS and UPS data illustrates the importance of the metal surface dipole in understanding the workfunction changes upon molecular adsorption on metal surfaces. © 2001 Elsevier Science B.V. All rights reserved.

Lazzaroni, R.Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium (author)
Crispin, AnnicaLinköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi(Swepub:liu)anncr91 (author)
Geskin, V.M.Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium, Department of Chemistry, University of Arizona, Tucson, AZ 85721-0041, United States (author)
Bredas, J.L.Brédas, J.L., Service de Chimie des Matériaux Nouveaux, Centre de Recherche en Electronique et Photonique Moléculaires, Université de Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium (author)
Salaneck, William RLinköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi(Swepub:liu)wilsa67 (author)
Linköpings universitetTekniska högskolan (creator_code:org_t)

In:Journal of Electron Spectroscopy and Related Phenomena121:1-3, s. 57-740368-20481873-2526

By the author/editor: Crispin, Xavier; Lazzaroni, R.; Crispin, Annica; Geskin, V.M.; Bredas, J.L.; Salaneck, Willia ...

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