Light scattering studies in cellulose derivative based PDLC type cells

P. L. Almeida, M. T. Cidade, M. H. Godinho, António C. Ribeiro, J. L. Figueirinhas

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

In this work we have analysed the light scattering pattern produced by the cellulose derivative based PDLC type cells when illuminated at normal incidence by a laser light beam. The voltage dependence of the scattering pattern was obtained along with the voltage dependence of the cells' transmission coefficient. Two different types of cells were studied, one assembled with films of hydroxypropylcellulose (HPC), and the other assembled with films of HPC and cellulose acetate (CA) (9.1% w/w), both cross linked and not. The presence of CA, which was seen to affect the films' surface increasing significantly its rugosity, is correlated with the scattering patterns obtained. The light scattering results are globally analysed in terms of their implications for the optimisation of electro-optical properties of these types of cells.

Original languageEnglish
Pages (from-to)79-88
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals
Volume359
DOIs
Publication statusPublished - Apr 2001
EventVIIIth International Topical Meeting on Optics of Liquid Crystals (OLC'99) - Humacao, Puerto Rico
Duration: 27 Sep 19991 Oct 1999

Keywords

  • Electro-optical properties
  • Light scattering
  • Liquid crystals
  • PDLC
  • Solid films of cross-linked cellulose derivatives

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