Effect of size polydispersity in polymer-dispersed liquid-crystal films

Joś A. Ferrari; Enrique A. Dalchiele; Erna M. Frins; Juan A. Gentilini; Ćsar D. Perciante; Elizabeth Scherschener

doi:10.1063/1.2903063

Effect of size polydispersity in polymer-dispersed liquid-crystal films

Joś A. Ferrari, Enrique A. Dalchiele, Erna M. Frins, Juan A. Gentilini, Ćsar D. Perciante, Elizabeth Scherschener

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

16 Scopus citations

Abstract

The electro-optical effect of size polydispersity in polymer-dispersed liquid-crystal (PDLC) films is investigated. Liquid crystal (LC) droplets of different sizes require different electric field amplitudes for director reorientation, which will produce a mismatch of effective refractive indices. This, in turn, will produce an increase in interdroplet scattering (i.e., decrease in the direct transmitted light) within a specific range of electric field amplitudes. We propose a phenomenological "two-size" model describing this enhanced "pseudo-off-state" achieved under application of an electrical field and present validation experiments. Our approach may be used to get more insight into the transmittance behavior of PDLCs affecting the contrast ratio.

Original language	English
Article number	084505
Journal	Journal of Applied Physics
Volume	103
Issue number	8
DOIs	https://doi.org/10.1063/1.2903063
State	Published - 2008
Externally published	Yes

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title = "Effect of size polydispersity in polymer-dispersed liquid-crystal films",

abstract = "The electro-optical effect of size polydispersity in polymer-dispersed liquid-crystal (PDLC) films is investigated. Liquid crystal (LC) droplets of different sizes require different electric field amplitudes for director reorientation, which will produce a mismatch of effective refractive indices. This, in turn, will produce an increase in interdroplet scattering (i.e., decrease in the direct transmitted light) within a specific range of electric field amplitudes. We propose a phenomenological {"}two-size{"} model describing this enhanced {"}pseudo-off-state{"} achieved under application of an electrical field and present validation experiments. Our approach may be used to get more insight into the transmittance behavior of PDLCs affecting the contrast ratio.",

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T1 - Effect of size polydispersity in polymer-dispersed liquid-crystal films

AU - Ferrari, Joś A.

AU - Dalchiele, Enrique A.

AU - Frins, Erna M.

AU - Gentilini, Juan A.

AU - Perciante, Ćsar D.

AU - Scherschener, Elizabeth

PY - 2008

Y1 - 2008

N2 - The electro-optical effect of size polydispersity in polymer-dispersed liquid-crystal (PDLC) films is investigated. Liquid crystal (LC) droplets of different sizes require different electric field amplitudes for director reorientation, which will produce a mismatch of effective refractive indices. This, in turn, will produce an increase in interdroplet scattering (i.e., decrease in the direct transmitted light) within a specific range of electric field amplitudes. We propose a phenomenological "two-size" model describing this enhanced "pseudo-off-state" achieved under application of an electrical field and present validation experiments. Our approach may be used to get more insight into the transmittance behavior of PDLCs affecting the contrast ratio.

AB - The electro-optical effect of size polydispersity in polymer-dispersed liquid-crystal (PDLC) films is investigated. Liquid crystal (LC) droplets of different sizes require different electric field amplitudes for director reorientation, which will produce a mismatch of effective refractive indices. This, in turn, will produce an increase in interdroplet scattering (i.e., decrease in the direct transmitted light) within a specific range of electric field amplitudes. We propose a phenomenological "two-size" model describing this enhanced "pseudo-off-state" achieved under application of an electrical field and present validation experiments. Our approach may be used to get more insight into the transmittance behavior of PDLCs affecting the contrast ratio.

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U2 - 10.1063/1.2903063

DO - 10.1063/1.2903063

M3 - Artículo

AN - SCOPUS:43049127466

SN - 0021-8979

VL - 103

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

M1 - 084505

ER -

Effect of size polydispersity in polymer-dispersed liquid-crystal films

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