Electro-optical cells using a cellulose derivative and cholesteric liquid crystals

P. L. Almeida; S. Kundu; J. L. Figueirinhas; M. H. Godinho

doi:10.1080/02678290802604045

Electro-optical cells using a cellulose derivative and cholesteric liquid crystals

P. L. Almeida, S. Kundu, J. L. Figueirinhas, M. H. Godinho

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

7 Citations (Scopus)

Abstract

A cellulose derivative/liquid crystal composite-type electro-optical cell using a commercial cholesteric liquid crystal (CLC) was investigated. The electro-optical properties of the system were examined, i.e. the dependence on applied voltage of the reflected wavelength and the minimum and maximum transmissions. A thin film of the CLC was dispersed with a cross-linked cellulose film of 25 μm thickness. In the voltage dependence of the reflected wavelength it was verified that there is a hysteresis in the reflected wavelength. The variation of the reflected wavelength with temperature was also determined. The results are analysed in the framework of similar systems described in the literature for CLC dispersed in a polymer matrix.

Original language	English
Pages (from-to)	1345-1350
Number of pages	6
Journal	Liquid Crystals
Volume	35
Issue number	12
DOIs	https://doi.org/10.1080/02678290802604045
Publication status	Published - Dec 2008

Keywords

Cellulose derivative
Cholesteric liquid crystal
Electro-optical cell
Pitch
Temperature effect

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title = "Electro-optical cells using a cellulose derivative and cholesteric liquid crystals",

abstract = "A cellulose derivative/liquid crystal composite-type electro-optical cell using a commercial cholesteric liquid crystal (CLC) was investigated. The electro-optical properties of the system were examined, i.e. the dependence on applied voltage of the reflected wavelength and the minimum and maximum transmissions. A thin film of the CLC was dispersed with a cross-linked cellulose film of 25 μm thickness. In the voltage dependence of the reflected wavelength it was verified that there is a hysteresis in the reflected wavelength. The variation of the reflected wavelength with temperature was also determined. The results are analysed in the framework of similar systems described in the literature for CLC dispersed in a polymer matrix.",

keywords = "Cellulose derivative, Cholesteric liquid crystal, Electro-optical cell, Pitch, Temperature effect",

author = "Almeida, {P. L.} and S. Kundu and Figueirinhas, {J. L.} and Godinho, {M. H.}",

note = "This work was partly supported by projects POCTI/CTM/56382/2004 and by the Portuguese Science Foundation (FCT) through Pluriannual contracts with CENIMAT. S. Kundu thanks the Portuguese Science Foundation (FCT) for the granted fellowship SFRH/BPD/34096/2006.",

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T1 - Electro-optical cells using a cellulose derivative and cholesteric liquid crystals

AU - Almeida, P. L.

AU - Kundu, S.

AU - Figueirinhas, J. L.

AU - Godinho, M. H.

N1 - This work was partly supported by projects POCTI/CTM/56382/2004 and by the Portuguese Science Foundation (FCT) through Pluriannual contracts with CENIMAT. S. Kundu thanks the Portuguese Science Foundation (FCT) for the granted fellowship SFRH/BPD/34096/2006.

PY - 2008/12

Y1 - 2008/12

N2 - A cellulose derivative/liquid crystal composite-type electro-optical cell using a commercial cholesteric liquid crystal (CLC) was investigated. The electro-optical properties of the system were examined, i.e. the dependence on applied voltage of the reflected wavelength and the minimum and maximum transmissions. A thin film of the CLC was dispersed with a cross-linked cellulose film of 25 μm thickness. In the voltage dependence of the reflected wavelength it was verified that there is a hysteresis in the reflected wavelength. The variation of the reflected wavelength with temperature was also determined. The results are analysed in the framework of similar systems described in the literature for CLC dispersed in a polymer matrix.

AB - A cellulose derivative/liquid crystal composite-type electro-optical cell using a commercial cholesteric liquid crystal (CLC) was investigated. The electro-optical properties of the system were examined, i.e. the dependence on applied voltage of the reflected wavelength and the minimum and maximum transmissions. A thin film of the CLC was dispersed with a cross-linked cellulose film of 25 μm thickness. In the voltage dependence of the reflected wavelength it was verified that there is a hysteresis in the reflected wavelength. The variation of the reflected wavelength with temperature was also determined. The results are analysed in the framework of similar systems described in the literature for CLC dispersed in a polymer matrix.

KW - Cellulose derivative

KW - Cholesteric liquid crystal

KW - Electro-optical cell

KW - Pitch

KW - Temperature effect

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DO - 10.1080/02678290802604045

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VL - 35

SP - 1345

EP - 1350

JO - Liquid Crystals

JF - Liquid Crystals

IS - 12

ER -

Electro-optical cells using a cellulose derivative and cholesteric liquid crystals

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Keywords

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