Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

SS Roy, W Lehmann, E Gebhard, C Tolksdorf, R Zentel, F Kremer

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.
    LanguageEnglish
    Pages253-268
    JournalMolecular Crystals and Liquid Crystals
    Volume375
    Publication statusPublished - 2002

    Fingerprint

    elastomers
    electric fields
    polysiloxanes
    optical paths
    casts
    constrictions
    transition temperature
    liquid crystals
    harmonics
    x rays

    Cite this

    @article{fecf3ca3d643411f98aa563daf0d9753,
    title = "Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements",
    abstract = "We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7{\%} (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.",
    author = "SS Roy and W Lehmann and E Gebhard and C Tolksdorf and R Zentel and F Kremer",
    note = "9th International Topical Meeting on Optics of Liquid Crystals, SORRENTO, ITALY, OCT 01-06, 2001",
    year = "2002",
    language = "English",
    volume = "375",
    pages = "253--268",
    journal = "Molecular Crystals and Liquid Crystals",
    issn = "1542-1406",

    }

    Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements. / Roy, SS; Lehmann, W; Gebhard, E; Tolksdorf, C; Zentel, R; Kremer, F.

    In: Molecular Crystals and Liquid Crystals, Vol. 375, 2002, p. 253-268.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Inverse piezoelectric and electrostrictive response in freely suspended FLC elastomer film as detected by interferometric measurements

    AU - Roy, SS

    AU - Lehmann, W

    AU - Gebhard, E

    AU - Tolksdorf, C

    AU - Zentel, R

    AU - Kremer, F

    N1 - 9th International Topical Meeting on Optics of Liquid Crystals, SORRENTO, ITALY, OCT 01-06, 2001

    PY - 2002

    Y1 - 2002

    N2 - We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

    AB - We report the electric field induced thickness variations of homeotropically oriented free standing films of a smectic (C* or A*) FLCE prepared from cross - linkable ferroelectric polysiloxanes. The changes in optical path length in free standing ferroelectric liquid crystal elastomer films have been detected by means of interferometric measurements at both the first and second harmonic of the exciting electric field (w=33Hz). The measured electrostrictive strain is above 2.7% (in the thickness direction) at a electric field around 1.5 MV/m. Our experiment reveal that the inverse piezoelectric and electrostrictive response increases sharply near the Sm-C* - Sm-A* phase transition temperature. Also X-ray reflection measurements on a spin cast FLCE film reveal the constriction of smectic layers.

    M3 - Article

    VL - 375

    SP - 253

    EP - 268

    JO - Molecular Crystals and Liquid Crystals

    T2 - Molecular Crystals and Liquid Crystals

    JF - Molecular Crystals and Liquid Crystals

    SN - 1542-1406

    ER -