New advances on the characterisation of polymer surfaces by HREELS |
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| Authors: | Manuel Rei Vilar Ana Maria Botelho do Rego Gilles Horowitz Philippe Lang Claude Nogues Yvette Jugnet |
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| Institution: | 1. LADIR (CNRS-Université Pierre et Marie Curie) 2, rue Henri Dunant, F-94320 Thiais, France;2. CQFM (IST-UTL) Av. Rovisco Pais, P-1049-001 Lisbon, Portugal;3. ITODYS (CNRS-Université Denis Diderot) 1, rue Guy de la Brosse, F-75005 Paris, France;4. IRC (CNRS) 2 avenue A. Einstein, F-69626 Villeurbanne Cedex, France |
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| Abstract: | Self assembled monolayers (SAMs) of thiols functionalised with oligothiophene functions were used as models for polymer surfaces. Thienyl functionalisation simulates the surface region and demonstrates that the analysed depth is of the order of 10 Å. Spectra of polystyrene (PS) films were recorded and show that impact mechanism dominates, which corroborates the high sensitivity of HREELS applied to polymer surfaces. Different orientation of phenyl groups is unravel for PS films deposited on platinum and silicon substrates, which is here related to a different conformation of the PS chains in the surface region of the film. To illustrate the state of the art of HREELS applied to organic films, spectra were recorded with old and new generation spectrometers. |
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