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Liquid Crystals Volume 40, 2013 - Issue 6
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Original Articles

Light shutters from nanocrystalline cellulose rods in a nematic liquid crystal

Yong Geng CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
,
Pedro Brogueira Departamento de Física, Instituto Superior Técnico, IST, Universidade Técnica de Lisboa, and CFMC, Av. Prof. Gama Pinto, 2, P-1649-003 Lisboa, Portugal
,
João Luis Figueirinhas Departamento de Física, Instituto Superior Técnico, IST, Universidade Técnica de Lisboa, and CFMC, Av. Prof. Gama Pinto, 2, P-1649-003 Lisboa, Portugal
,
Maria Helena Godinho CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
&
Pedro Lúcio Almeida CENIMAT/I3N, Departamento de Ciência dos Materiais, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal; Área Departamental de Física, Instituto Superior de Engenharia de Lisboa, Lisboa, PortugalCorrespondence[email protected]
Pages 769-773 | Received 21 Jan 2013, Accepted 04 Mar 2013, Published online: 22 Mar 2013
 
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Abstract

This work reports a recently developed electro-optical (EO) device that can potentially be used as a light shutter or a privacy window. By using nanocrystalline cellulose rods, we were able to improve some of the most relevant parameters characterising the EO behaviour. A brief description of the proposed working mechanism for these devices is presented, and numerical simulations based on this mechanism of both the optical transmission and the cells' electrical capacitance are compared with the obtained results, validating the underlying working model considered.

Acknowledgements

This work was sponsored by the Portuguese Science and Technology Foundation grant SFRH/BD/63574/2009 and projects PTDC/CTM/099595/2008, PTDC/FIS/110132/2009 and PEst-C/CTM/LA0025/2011 (Strategic Project – LA 25-2011-2012)

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