Chiral nematic liquid crystal droplets as a basis for sensor systems

Daniel A. Paterson; Xiaoxue Du; Peng Bao; Adele A. Parry; Sally A. Peyman; Jonathan A. T. Sandoe; Stephen D. Evans; Dan Luo; Richard J. Bushby; J. Cliff Jones; Helen F. Gleeson

doi:10.1039/d1me00189b

Chiral nematic liquid crystal droplets as a basis for sensor systems

Daniel A. Paterson^*, Xiaoxue Du, Peng Bao, Adele A. Parry, Sally A. Peyman, Jonathan A. T. Sandoe, Stephen D. Evans, Dan Luo, Richard J. Bushby, J. Cliff Jones, Helen F. Gleeson^*

^*Corresponding author for this work

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

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Abstract

For a series of phospholipid coated calamitic nematic liquid crystal droplets (5CB, 6CB, 7CB, E7 and MLC7023) of diameter ∼18 μm, the addition of chiral dopant leaves the sign of surface anchoring unchanged. Herein we report that for these chiral nematic droplets an analyte induced transition from a Frank-Pryce structure (with planar anchoring) to a nested-cup structure (with perpendicular anchoring) is accompanied by changes in the intensity of reflected light. We propose this system as both a general scheme for understanding director fields in chiral nematic liquid crystal droplets with perpendicular anchoring and as an ideal candidate to be utilised as the basis for developing cheap, single use LC-based sensor devices.

Original language	English
Pages (from-to)	607-621
Number of pages	15
Journal	Molecular Systems Design and Engineering
Volume	7
Issue number	6
Early online date	7 Mar 2022
DOIs	https://doi.org/10.1039/d1me00189b
Publication status	Published - 1 Jun 2022

ASJC Scopus subject areas

Chemistry (miscellaneous)
Chemical Engineering (miscellaneous)
Biomedical Engineering
Energy Engineering and Power Technology
Process Chemistry and Technology
Industrial and Manufacturing Engineering
Materials Chemistry

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title = "Chiral nematic liquid crystal droplets as a basis for sensor systems",

abstract = "For a series of phospholipid coated calamitic nematic liquid crystal droplets (5CB, 6CB, 7CB, E7 and MLC7023) of diameter ∼18 μm, the addition of chiral dopant leaves the sign of surface anchoring unchanged. Herein we report that for these chiral nematic droplets an analyte induced transition from a Frank-Pryce structure (with planar anchoring) to a nested-cup structure (with perpendicular anchoring) is accompanied by changes in the intensity of reflected light. We propose this system as both a general scheme for understanding director fields in chiral nematic liquid crystal droplets with perpendicular anchoring and as an ideal candidate to be utilised as the basis for developing cheap, single use LC-based sensor devices.",

author = "Paterson, {Daniel A.} and Xiaoxue Du and Peng Bao and Parry, {Adele A.} and Peyman, {Sally A.} and Sandoe, {Jonathan A. T.} and Evans, {Stephen D.} and Dan Luo and Bushby, {Richard J.} and Jones, {J. Cliff} and Gleeson, {Helen F.}",

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AU - Paterson, Daniel A.

AU - Du, Xiaoxue

AU - Bao, Peng

AU - Parry, Adele A.

AU - Peyman, Sally A.

AU - Sandoe, Jonathan A. T.

AU - Evans, Stephen D.

AU - Luo, Dan

AU - Bushby, Richard J.

AU - Jones, J. Cliff

AU - Gleeson, Helen F.

PY - 2022/6/1

Y1 - 2022/6/1

N2 - For a series of phospholipid coated calamitic nematic liquid crystal droplets (5CB, 6CB, 7CB, E7 and MLC7023) of diameter ∼18 μm, the addition of chiral dopant leaves the sign of surface anchoring unchanged. Herein we report that for these chiral nematic droplets an analyte induced transition from a Frank-Pryce structure (with planar anchoring) to a nested-cup structure (with perpendicular anchoring) is accompanied by changes in the intensity of reflected light. We propose this system as both a general scheme for understanding director fields in chiral nematic liquid crystal droplets with perpendicular anchoring and as an ideal candidate to be utilised as the basis for developing cheap, single use LC-based sensor devices.

AB - For a series of phospholipid coated calamitic nematic liquid crystal droplets (5CB, 6CB, 7CB, E7 and MLC7023) of diameter ∼18 μm, the addition of chiral dopant leaves the sign of surface anchoring unchanged. Herein we report that for these chiral nematic droplets an analyte induced transition from a Frank-Pryce structure (with planar anchoring) to a nested-cup structure (with perpendicular anchoring) is accompanied by changes in the intensity of reflected light. We propose this system as both a general scheme for understanding director fields in chiral nematic liquid crystal droplets with perpendicular anchoring and as an ideal candidate to be utilised as the basis for developing cheap, single use LC-based sensor devices.

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EP - 621

JO - Molecular Systems Design and Engineering

JF - Molecular Systems Design and Engineering

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Chiral nematic liquid crystal droplets as a basis for sensor systems

Abstract

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