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Updated: Feb 15, 2026
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
Published on: February 6, 2016
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Liquid crystal elastomer coatings with programmed response of surface profile
Greta Babakhanova1,2, Taras Turiv1,2, Yubing Guo1,2
1Liquid Crystal Institute, Kent State University, Kent, OH, 44242, USA.
Nature Communications
|February 2, 2018
Summary
Liquid crystal elastomers dynamically control surface topography via patterned molecular orientation. This breakthrough enables novel applications in soft robotics and biomimetic materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Soft Matter Physics
Background:
- Stimuli-responsive liquid crystal elastomers (LCEs) exhibit unique properties where molecular orientation influences rubber-like elasticity.
- These materials offer potential for soft robotics, sensing, and transport due to their mechanical response to external stimuli like temperature changes.
- Thermally activated muscle-like contraction is a key characteristic of LCEs driven by changes in orientational order.
Purpose of the Study:
- To demonstrate dynamic thermal control over the surface topography of LCE coatings.
- To investigate how patterned in-plane molecular orientation dictates the coating's topographical response to temperature variations.
- To explain the underlying forces governing the deterministic relationship between in-plane orientation and out-of-plane deformation.
Main Methods:
- Preparation of an LCE coating with a specific pattern of in-plane molecular orientation.
- Application of dynamic thermal stimuli to induce changes in surface topography.
- Analysis of the relationship between the inscribed molecular orientation pattern and the resulting surface deformations (elevations, depressions, in-plane).
Main Results:
- The inscribed pattern of in-plane molecular orientation deterministically controls the development of surface topography (elevations, depressions, or in-plane deformations) upon thermal stimulation.
- The observed dynamic topographical changes are explained by activation forces arising from polymer network stretching-contraction and spatially varying molecular orientation.
- This work establishes a link between molecular orientation and macroscopic surface behavior in LCEs.
Conclusions:
- The activation force concept provides a framework for understanding the responsive behavior of LCEs, positioning them within the realm of active matter.
- The demonstrated control over surface topography through patterned molecular orientation can be leveraged to design advanced coatings.
- These functional coatings can mimic biological tissues, such as skin, opening avenues for bio-inspired engineering and advanced material design.
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