An optical microscopy study of the biaxial - calamitic nematic lyotropic phase transition
✍ Scribed by D. A. Oliveira; D. D. Luders; G. P. Souza; N. M. Kimura; A. J. Palangana
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 203 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0232-1300
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Lyotropic nematic textures are investigated, using optical microscopy, near the reentrant isotropic (I~RE~) ‐ discotic nematic (N~D~^‐^) ‐ biaxial nematic (N~B~) ‐ calamitic nematic (N~C~^+^) ‐ isotropic (I) phase transitions in a lyotropic mixture of potassium laurate, decanol and D~2~O. The N~B~, intermediate phase between the two uniaxial nematic ones, is characterized by optical birefringence measurements. In this way, using a polarizing microscope and a colour CCD digital camera, the N~B~ – N~C~^+^ phase transition is identified as well as the domain of the N~B~ phase and N~D~^‐^ – N~B~ transition point in accordance with optical birefringence data (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)