title: Electrically induced deformation in chiral smectic elastomers with different domain structures.
abstract: Electrical actuation is investigated in two kinds of chiral smectic liquid-crystal elastomers (LCEs) with different domain structures LCE1 and LCE2: The latter is better than the former in orientational order. Tracking fluorescent beads dispersed on the samples enables us to measure the two-dimensional strain tensors in ferroelectric elastomer films. It turns out that the electric-field-induced strain is polarity dependent and the type of molecular orientation responsible for the strain is specified. In LCE1 the shear strain is dominant, whereas in LCE2 it is comparable to the elongation strain, which is explained by the rotation of the principal axes. The essential differences of the two elastomers are observed in the eigenvalues of the strain tensors. The absolute values for LCE1 are larger than those for LCE2. The difference is discussed on the basis of the domain structures.
authors.affiliation: Department of Advanced Materials, Hannam University, Jeonmin-dong 461-6, Yuseong-gu, Daejeon 305-811, Korea.
authors.forename: Yang Ho
authors.initials: YH
authors.lastname: Na
authors.affiliation: Division of Applied Physics, Faculty of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-8628, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Aburaya
authors.affiliation: Division of Applied Physics, Faculty of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-8628, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Orihara
authors.affiliation: Department of Life Science & Sustainable Chemistry, Tokyo Polytechnic University, 1583 Iiyama, Atsugi 243-0297, Japan.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Hiraoka
authors.affiliation: Department of Mechanical and Design Engineering, Hongik University, Sejong-ro 2639, Jochiwon-eup, Sejong 339-701, Korea.
authors.forename: Youngbae
authors.initials: Y
authors.lastname: Han