Conoscopic image of a biaxial negative nematic phase in a potassium laurate-decanol-D2O mixture

被引：23

作者：

Braga, W. S. ^{[1
,2
]}

Santos, O. R. ^{[1
,2
]}

Luders, D. D. ^{[1
]}

Sampaio, A. R. ^{[1
]}

Kimura, N. M. ^{[1
]}

Simoes, M. ^{[3
]}

Palangana, A. J. ^{[1
]}

机构：

[1] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana, Brazil

[2] Univ Tecnol Fed Parana, BR-87301006 Campo Mourao, Parana, Brazil

[3] Univ Estadual Londrina, Dept Fis, BR-86051990 Londrina, PR, Brazil

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2013年 / 187卷

关键词：

Conoscopic image; Discotic nematic; Biaxial positive nematic; Biaxial negative nematic; Calamitic nematic; TRANSITIONS; TEMPERATURE;

D O I：

10.1016/j.molliq.2013.05.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The discotic nematic (N-D)-biaxial nematic (N-B)-calamitic nematic (N-C) phase transitions are studied in a potassium laurate-decanol-D2O mixture by optical conoscopy. The N-D(+) (N-C(-)) phase is uniaxial positive (negative) as expected. Nevertheless, inside the biaxial range, beyond the known biaxial positive (N-B(+)) nematic phase we have also found a biaxial negative (N-B(-)) nematic phase optically characterized through conoscopic images. A transition point from a N-B(+) to a N-B(-) configuration is determined and discussed in this work. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：20 / 23

页数：4

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