Effect of enantiomeric excess on surface structures and phase sequences in free-standing liquid-crystal films

被引：17
|
作者：
Cady, A [1 ]
Liu, ZQ
Han, XF
Wang, ST
Veum, M
Janarthanan, N
Hsu, CS
Olson, DA
Huang, CC
机构：
[1] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
[2] Univ Wisconsin, Dept Phys, Stevens Point, WI 54481 USA
[3] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30050, Taiwan
来源：
PHYSICAL REVIEW E | 2002年 / 66卷 / 06期
关键词：
D O I：
10.1103/PhysRevE.66.061704
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We present differential optical reflectivity and null transmission ellipsometry data from several mixtures of MHPBC enantiomers. From this data, we have determined the chiral smectic phase sequence as a function of enantiomeric excess. The data suggest a change in the structure of the smectic-C-alpha* phase and the surface tilt state as the enantiomeric excess is reduced. The results also show that the intermediate phases, smectic C-FI2*, smectic C-FI1*, and smectic C-alpha*, disappear sequentially on reducing the net chirality.
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页数：6
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