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The European Physical Journal Special Topics

, Volume 141, Issue 1, pp 193–198 | Cite as

Investigation of structural relaxation and surface modification of ultrathin films of poly(ethylene terephthalate)

  • D. Prevosto
  • S. Napolitano
  • P. Pingue
  • S. Capaccioli
  • M. Lucchesi
Article

Abstract.

We studied dynamic properties of ultrathin films of poly(ethylene terephthalate) spincoated on different substrates, by means of dielectric spectroscopy and surface patterning experiments. We did not observe any variations of structural dielectric relaxation dynamics for films spincoated on aluminium substrate having thicknesses down to 40 nm. On the same substrate, 13 nm thick films are instead characterized by a reduction of the chains mobility. Surprisingly the chains dynamics as probed by a surface nanopatterning experiment evidenced a strong dependence on the substrate interaction even for 50 nm thick films, where dielectric relaxation dynamics is unaffected. It can be deduced that different length scales characterise dielectric relaxation dynamics and the processes related to the surface patterning, even if both are related to the chain mobility. Further experiments are wished to better understand this intriguing scenario.

Keywords

Contact Angle Interfacial Energy European Physical Journal Special Topic Dielectric Relaxation Structural Relaxation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  • D. Prevosto
    • 1
    • 2
  • S. Napolitano
    • 1
    • 3
  • P. Pingue
    • 4
  • S. Capaccioli
    • 2
  • M. Lucchesi
    • 1
    • 2
  1. 1.Polylab-CNRPisaItaly
  2. 2.Department of PhysicsUniversity of PisaPisaItaly
  3. 3.Department of Physics and Astronomy, Katholieke Universiteit LeuvenLaboratory of Acoustic and Thermal PhysicsLeuvenBelgium
  4. 4.NEST-CNR and Scuola Normale, University of PisaPisaItaly

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