2013
DOI: 10.1080/15421406.2012.763208
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Reversible Heat-Induced Microwrinkling of PEDOT:PSS Nanofilm Surface Over a Monodomain Liquid Crystal Elastomer

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 goo… Show more

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Cited by 13 publications
(35 citation statements)
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“…The presence of the wrinkles was confirmed through optical microscopy ( Figure a), and it was clear that the wrinkles always extend parallel to the alignment director of the underlying LC network. This is in contrast to previous research using a crosslinked LC network as the foundation, where the wrinkles always ran perpendicular to the alignment director when formed upon heating, or parallel to the director when formed upon cooling . In the latter cases, the anisotropic contraction of the LC network, which takes place parallel to the director upon heating, was responsible for the formation of wrinkles.…”
Section: Resultscontrasting
confidence: 95%
“…The presence of the wrinkles was confirmed through optical microscopy ( Figure a), and it was clear that the wrinkles always extend parallel to the alignment director of the underlying LC network. This is in contrast to previous research using a crosslinked LC network as the foundation, where the wrinkles always ran perpendicular to the alignment director when formed upon heating, or parallel to the director when formed upon cooling . In the latter cases, the anisotropic contraction of the LC network, which takes place parallel to the director upon heating, was responsible for the formation of wrinkles.…”
Section: Resultscontrasting
confidence: 95%
“…A typical energy of the structure under study couples the elastic film's deformation to that of the NLCE which, in turn, accounts for the interaction between the nematic monomers with the polymeric matrix as [19]. The direction defining the director alignment (n ⊗ n) is shown in orange.…”
Section: The Energy Functionalmentioning
confidence: 99%
“…Another field of research related to LCE composites concerns the preparation of bilayered or multilayered systems obtained by coupling monodomain LCE films, mainly prepared according to the “two-step” cross-linking procedure [35], and one or two layers of conductive materials deposited onto the top surface of LCEs. These bilayered (or multilayered) systems were the object of several experimental and theoretical works in the past six years [85,86,87,88,89,90,91,92,93,94,95]. Several new technological applications were explored in detail based on unique phenomena characterizing the LCE-based bilayer composites, such as bending actuation [85,87,89,91,92,93,94,95] and surface wrinkling [85,86,88,90,92,93,94], as described in the sections below.…”
Section: Lce-based Bilayer Compositesmentioning
confidence: 99%
“…The first bilayer LCE-systems were produced by depositing conductive nanostructured thin polymer layers on the top surface of standard polysiloxane-based LCE films (see the general schemes reported in Figure 15). Agrawal et al [90] used nanolayers of poly(styrene) (PS), while Domenici, Greco et al [86,87,88] chose the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) conductive polymer.…”
Section: Lce-based Bilayer Compositesmentioning
confidence: 99%
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