Composite systems for display applications from cellulose elastomers and nematic liquid crystals

M. H. Godinho, A. F. Martins, J. L. Figueirinhas

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Composite systems made from cellulose derivatives solid films impregnated by a nematic liquid crystal can be used as electro-optical devices [H.V. Craighead, J. Cheng, S. Hackwood, Appl. Phys. Lett., 40 (1982) 22; M.H. Godinho, J.L. Figueirinhas, A.F. Martins, Liquid Cryst., 20(3) (1996) 373]. The electro-optical behavior of such cells depends on the nature of the cellulose derivative used, the nematic liquid crystal, the preparation conditions of the cells and of the cellulosic films, and the rugosity of the films' surface [M.H. Godinho, J.L. Figueirinhas, A.F. Martins, Liquid Cryst., 20(3) (1996) 373; M.H. Godinho, A.F. Martins, A. Almeida, J.L. Figueirinhas, 16th International Liquid Crystal Conference, Kent USA, June 24-28, 1996]. In this work we study the influence of preparation techniques, number of polymer layers (1-3 layers each 9 μm thick), thickness of the liquid crystal layer (8-18 μm) and ageing (9 months), upon the electro-optical response of the cells. The cells used in this work were shown to exhibit high transmission coefficients (up to 82%) in the activated state and high contrast (up to 266). They also show good temporal stability and the cells' optical behaviour is strongly dependent on the number of films' layers.

Original languageEnglish
Pages (from-to)226-229
Number of pages4
JournalOptical Materials
Volume9
Issue number1-4
DOIs
Publication statusPublished - 1 Jan 1998
EventSymposium M on Materials, Physics and Devices for Molecular Electronics and Photonics of the 1997 Annual Meeting of the European Materials Research Society - Strasbourg, France
Duration: 16 Jun 199719 Jun 1997

Fingerprint Dive into the research topics of 'Composite systems for display applications from cellulose elastomers and nematic liquid crystals'. Together they form a unique fingerprint.

  • Cite this