Dynamic light scattering study of biaxial ordering in a thermotropic liquid crystal

K. Neupane; S. W. Kang; S. Sharma; D. Carney; T. Meyer; G. H. Mehl; D. W. Allender; Satyendra Kumar; S. Sprunt

doi:10.1103/PhysRevLett.97.207802

Dynamic light scattering study of biaxial ordering in a thermotropic liquid crystal

K. Neupane^*
, S. W. Kang
, S. Sharma
, D. Carney
, T. Meyer
, G. H. Mehl
, D. W. Allender
, Satyendra Kumar
, S. Sprunt

^*Corresponding author for this work

Department of Nano Convergence Engineering

Kent State University
University of Cincinnati
University of Hull

Research output: Contribution to journal › Journal article › peer-review

78 Scopus citations

Abstract

Dynamic light scattering from orientational order fluctuations in a liquid crystalline tetrapode reveals successive, weakly first-order isotropic to uniaxial and uniaxial to biaxial nematic phase transitions. The order parameter relaxation rates exhibit temperature dependences consistent with Landau-de Gennes mean field theory. Combined with previous evidence of a second-order uniaxial-biaxial transition in a closely related tetrapode, the present study supports the existence of a nematic-nematic tricritical point in thermotropic liquid crystals.

Original language	English
Article number	207802
Journal	Physical Review Letters
Volume	97
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.97.207802
State	Published - 2006

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10.1103/PhysRevLett.97.207802

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title = "Dynamic light scattering study of biaxial ordering in a thermotropic liquid crystal",

abstract = "Dynamic light scattering from orientational order fluctuations in a liquid crystalline tetrapode reveals successive, weakly first-order isotropic to uniaxial and uniaxial to biaxial nematic phase transitions. The order parameter relaxation rates exhibit temperature dependences consistent with Landau-de Gennes mean field theory. Combined with previous evidence of a second-order uniaxial-biaxial transition in a closely related tetrapode, the present study supports the existence of a nematic-nematic tricritical point in thermotropic liquid crystals.",

author = "K. Neupane and Kang, \{S. W.\} and S. Sharma and D. Carney and T. Meyer and Mehl, \{G. H.\} and Allender, \{D. W.\} and Satyendra Kumar and S. Sprunt",

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journal = "Physical Review Letters",

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T1 - Dynamic light scattering study of biaxial ordering in a thermotropic liquid crystal

AU - Neupane, K.

AU - Kang, S. W.

AU - Sharma, S.

AU - Carney, D.

AU - Meyer, T.

AU - Mehl, G. H.

AU - Allender, D. W.

AU - Kumar, Satyendra

AU - Sprunt, S.

PY - 2006

Y1 - 2006

N2 - Dynamic light scattering from orientational order fluctuations in a liquid crystalline tetrapode reveals successive, weakly first-order isotropic to uniaxial and uniaxial to biaxial nematic phase transitions. The order parameter relaxation rates exhibit temperature dependences consistent with Landau-de Gennes mean field theory. Combined with previous evidence of a second-order uniaxial-biaxial transition in a closely related tetrapode, the present study supports the existence of a nematic-nematic tricritical point in thermotropic liquid crystals.

AB - Dynamic light scattering from orientational order fluctuations in a liquid crystalline tetrapode reveals successive, weakly first-order isotropic to uniaxial and uniaxial to biaxial nematic phase transitions. The order parameter relaxation rates exhibit temperature dependences consistent with Landau-de Gennes mean field theory. Combined with previous evidence of a second-order uniaxial-biaxial transition in a closely related tetrapode, the present study supports the existence of a nematic-nematic tricritical point in thermotropic liquid crystals.

UR - https://www.scopus.com/pages/publications/33751104750

U2 - 10.1103/PhysRevLett.97.207802

DO - 10.1103/PhysRevLett.97.207802

M3 - Journal article

AN - SCOPUS:33751104750

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VL - 97

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

M1 - 207802

ER -

Dynamic light scattering study of biaxial ordering in a thermotropic liquid crystal

Abstract

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