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Article

Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis

by
Akihiko Matsuyama
Department of Physics and Information Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Kawazu 680-4, Iizuka, Fukuoka 820-8502, Japan
Gels 2020, 6(4), 40; https://doi.org/10.3390/gels6040040
Submission received: 22 July 2020 / Revised: 6 November 2020 / Accepted: 12 November 2020 / Published: 16 November 2020
(This article belongs to the Special Issue New Era in the Volume Phase Transition of Gels)
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Abstract

We present a mean field theory to describe cholesteric elastomers and gels under an external field, such as an electric or a magnetic field, along the helix axis of a cholesteric phase. We study the deformations and volume phase transitions of cholesteric gels as a function of the external field and temperature. Our theory predicts the phase transitions between isotropic (I), nematic (N), and heliconical cholesteric (ChH) phases and the deformations of the elastomers at these phase transition temperatures. We also find volume phase transitions at the I−ChH and the N−ChH phase transitions.
Keywords: liquid crystal; cholesteric gel; elastomer; volume phase transition liquid crystal; cholesteric gel; elastomer; volume phase transition

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MDPI and ACS Style

Matsuyama, A. Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis. Gels 2020, 6, 40. https://doi.org/10.3390/gels6040040

AMA Style

Matsuyama A. Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis. Gels. 2020; 6(4):40. https://doi.org/10.3390/gels6040040

Chicago/Turabian Style

Matsuyama, Akihiko. 2020. "Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis" Gels 6, no. 4: 40. https://doi.org/10.3390/gels6040040

APA Style

Matsuyama, A. (2020). Volume Phase Transitions of Heliconical Cholesteric Gels under an External Field along the Helix Axis. Gels, 6(4), 40. https://doi.org/10.3390/gels6040040

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