Reversible heat-induced microwrinkling of PEDOT: PSS nanofilm surface over a monodomain liquid crystal elastomer

Francesco Greco, Valentina Domenici, Stefano Romiti, Tareq Assaf, Blaž Zupančič, Jerneja Milavec, Boštjan Zalar, Barbara Mazzolai, Virgilio Mattoli

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

New bilayered composite systems with tunable and temperature-dependent formation of periodical wrinkles on the surface are the object of this report. The samples were prepared by spin-coating deposition of a thin film of the conducting polymer poly(ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on the surface of standard monodomain liquid crystal elastomer (LCE) films. Several bilayered materials were prepared by changing the thickness of PEDOT:PSS nanofilms. Basic characterization showed very good stability and adhesion between the two components also after performing multiple heat cycles around nematic-to-isotropic transition temperature of the LCE. Interestingly, formation of uniaxially aligned microwrinkles was observed, with most of the wrinkles aligned along perpendicular direction with respect to the nematic director, due to reversible elongation/compression of the LCE during thermal cycles.

Original languageEnglish
Pages (from-to)40-49
Number of pages10
JournalMolecular Crystals and Liquid Crystals
Volume572
Issue number1
DOIs
Publication statusPublished - 2013 Mar 1
Externally publishedYes

Keywords

  • Actuation
  • bending
  • composite
  • conductive polymer
  • Joule heating
  • liquid crystal elastomer
  • PEDOT:PSS
  • soft actuation
  • surface
  • wrinkling

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

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  • Cite this

    Greco, F., Domenici, V., Romiti, S., Assaf, T., Zupančič, B., Milavec, J., Zalar, B., Mazzolai, B., & Mattoli, V. (2013). Reversible heat-induced microwrinkling of PEDOT: PSS nanofilm surface over a monodomain liquid crystal elastomer. Molecular Crystals and Liquid Crystals, 572(1), 40-49. https://doi.org/10.1080/15421406.2012.763208