scholarly journals A New Type of Macroscopically Oriented Smectic-A Liquid Crystal Elastomer

2007 ◽  
Vol 28 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Ansgar Komp ◽  
Heino Finkelmann
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Elastomer ◽  
Smectic A ◽  
New Type

Stress-strain and thermomechanical characterization of nematic to smectic A transition in a strongly-crosslinked bimesogenic liquid crystal elastomer

Polymer ◽  
2018 ◽  
Vol 158 ◽  
pp. 96-102 ◽  
Author(s):  
Andraž Rešetič ◽  
Jerneja Milavec ◽  
Valentina Domenici ◽  
Blaž Zupančič ◽  
Alexey Bubnov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Stress Strain ◽  
Liquid Crystal Elastomer ◽  
Smectic A ◽  
Thermomechanical Characterization

Electric-field-induced deformation of a chiral liquid-crystal elastomer in smectic A phase

2012 ◽  
Vol 24 (2) ◽  
pp. 83-88 ◽  
Author(s):  
Yuki Aburaya ◽  
Yang Ho Na ◽  
Hiroshi Orihara ◽  
Kazuyuki Hiraoka
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Liquid Crystal Elastomer ◽  
Smectic A ◽  
Chiral Liquid Crystal ◽  
Smectic A Phase

scholarly journals Synchrotron Microbeam Diffraction Studies on the Alignment within 3D-Printed Smectic-A Liquid Crystal Elastomer Filaments during Extrusion

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 523
Author(s):  
Marianne E. Prévôt ◽  
Senay Ustunel ◽  
Benjamin M. Yavitt ◽  
Guillaume Freychet ◽  
Caitlyn R. Webb ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
3D Printing ◽  
Internal Structure ◽  
Smart Materials ◽  
Time Resolved ◽  
Promote Cell Proliferation ◽  
Liquid Crystal Elastomer ◽  
Smectic A ◽  
3D Printed ◽  
Liquid Crystal Elastomers

3D printing of novel and smart materials has received considerable attention due to its applications within biological and medical fields, mostly as they can be used to print complex architectures and particular designs. However, the internal structure during 3D printing can be problematic to resolve. We present here how time-resolved synchrotron microbeam Small-Angle X-ray Diffraction (μ-SAXD) allows us to elucidate the local orientational structure of a liquid crystal elastomer-based printed scaffold. Most reported 3D-printed liquid crystal elastomers are mainly nematic; here, we present a Smectic-A 3D-printed liquid crystal elastomer that has previously been reported to promote cell proliferation and alignment. The data obtained on the 3D-printed filaments will provide insights into the internal structure of the liquid crystal elastomer for the future fabrication of liquid crystal elastomers as responsive and anisotropic 3D cell scaffolds.

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

Modeling of photo-responsive liquid crystal elastomer actuators

2021 ◽  
Vol 560 ◽  
pp. 441-455
Author(s):  
Jundong Wu ◽  
Wenjun Ye ◽  
Yawu Wang ◽  
Chun-Yi Su
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Elastomer
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