Optical properties of microconfined liquid crystals

Ch Cramer, H. Binder, M. Schubert, B. Rheinländer, H. Schmiedel

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

This paper is concerned with studies of birefringence and optical activity of the twisted nematic mixture 5CB/CB15 confined to cylindrical pores of ANOPORE (AP) membranes. Both birefringence and optical activity of the liquid crystal (LC) filled membranes exhibit unusual properties. The sign of the optical activity is reversed with respect to the bulk LC phase. Measurements have been performed using polarizing microscopy and generalized transmission ellipsometry. By means of 13C-NMR and FTIR experiments an increase of the tilt angle between local director and membrane normal with raising chiral dopant concentration could be proved. However, an unambiguous model for the structure of the chiral director field inside the pores could not be established up to now.

Original languageEnglish (US)
Pages (from-to)395-405
Number of pages11
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume282
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Condensed Matter Physics

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