Dergiler / Celal Bayar Üniversitesi Fen Bilimleri Dergisi / 2018 / Cilt: 14 - Sayı: 2

Effect of Dopant Structure on Birefringences and Symmetric Tensor Invariants of Lyotropic Nematic Phases

Effect of Dopant Structure on Birefringences and Symmetric Tensor Invariants of Lyotropic Nematic Phases

Erol AKPINAR

Sayfa
229–235
DOI
—

Abstract

In this study,we investigated the effect of the dopant structure on the birefringences andthe symmetric tensor invariants of lyotropic discotic nematic (ND),calamitic nematic (NC) and biaxial nematic (NB) phases.Lyotropic host mixture consisted of potassium laurate (KL)/decanol(DeOH)/water. Some dopant molecules were added to this host mixture to obtainquaternary mixtures and to investigate the nematic phase properties bypolarizing optical microscopy and laser conoscopy. It was found that the dopantmolecules with aromatic ring affect the birefringences and symmetric tensorinvariants more efficiently than those with straight alkyl chain.