Photo-driven giant reduction of the Frank elastic constants in a bent-core nematic liquid crystal

P. Lakshmi Madhuri; S. Krishna Prasad; Uma S. Hiremath; C. V. Yelamaggad

doi:10.1063/1.4885041

Photo-driven giant reduction of the Frank elastic constants in a bent-core nematic liquid crystal

P. Lakshmi Madhuri, S. Krishna Prasad, Uma S. Hiremath, C. V. Yelamaggad

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We report the influence of photoisomerization on the splay (K₁₁) and bend (K₃₃) elastic constants in a bent-core nematic doped with a small amount of a calamitic photoactive compound. Trans-cis isomerization of the latter compound results in a large decrease (factor of ∼3 for K ₃₃) of both the moduli, and K₃₃ becoming almost independent of temperature except near the isotropic phase. The observed variations are much larger than can be explained by order parameter changes, and are explained using an argument based on the molecular arrangement.

Original language	English
Article number	241111
Journal	Applied Physics Letters
Volume	104
Issue number	24
DOIs	https://doi.org/10.1063/1.4885041
State	Published - 16 Jun 2014
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "We report the influence of photoisomerization on the splay (K11) and bend (K33) elastic constants in a bent-core nematic doped with a small amount of a calamitic photoactive compound. Trans-cis isomerization of the latter compound results in a large decrease (factor of ∼3 for K 33) of both the moduli, and K33 becoming almost independent of temperature except near the isotropic phase. The observed variations are much larger than can be explained by order parameter changes, and are explained using an argument based on the molecular arrangement.",

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AU - Madhuri, P. Lakshmi

AU - Krishna Prasad, S.

AU - Hiremath, Uma S.

AU - Yelamaggad, C. V.

PY - 2014/6/16

Y1 - 2014/6/16

N2 - We report the influence of photoisomerization on the splay (K11) and bend (K33) elastic constants in a bent-core nematic doped with a small amount of a calamitic photoactive compound. Trans-cis isomerization of the latter compound results in a large decrease (factor of ∼3 for K 33) of both the moduli, and K33 becoming almost independent of temperature except near the isotropic phase. The observed variations are much larger than can be explained by order parameter changes, and are explained using an argument based on the molecular arrangement.

AB - We report the influence of photoisomerization on the splay (K11) and bend (K33) elastic constants in a bent-core nematic doped with a small amount of a calamitic photoactive compound. Trans-cis isomerization of the latter compound results in a large decrease (factor of ∼3 for K 33) of both the moduli, and K33 becoming almost independent of temperature except near the isotropic phase. The observed variations are much larger than can be explained by order parameter changes, and are explained using an argument based on the molecular arrangement.

UR - https://www.scopus.com/pages/publications/84903172838

U2 - 10.1063/1.4885041

DO - 10.1063/1.4885041

M3 - Article

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

Photo-driven giant reduction of the Frank elastic constants in a bent-core nematic liquid crystal

Abstract

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