Comparative structural study of thin films of a columnar liquid crystal aligned by mechanical shearing and zone casting

被引：12

作者：

Anokhin, Denis V. ^{[2
]}

Rosenthal, Martin ^{[2
]}

Makowski, Tomasz ^{[1
]}

Tracz, Adam ^{[1
]}

Bras, Wim ^{[3
]}

Kvashnina, Kristina ^{[3
]}

Ivanov, Dimitri A. ^{[2
]}

机构：

[1] Polish Acad Sci, Ctr Mol & Macromol Studies, PL-90363 Lodz, Poland

[2] Inst Chim Surfaces & Interfaces, CNRS, UPR 9069, F-68057 Mulhouse, France

[3] European Synchrotron Radiat Facil, Netherlands Org Sci Res NWO, DUBBLE CRG, F-38043 Grenoble, France

来源：

THIN SOLID FILMS | 2008年 / 517卷 / 02期

关键词：

Columnar liquid crystal; Columnar alignment; Grazing Incidence X-ray Diffraction; Epitaxy; Phthalocyanine;

D O I：

10.1016/j.tsf.2008.07.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zone casting is a promising method for fabrication of open highly oriented crystalline and liquid crystalline (LC) films for various applications in (opto)electronics. We have performed a comparative structural analysis of mechanically sheared and zone-cast films of a model columnar LC. Grazing Incidence X-ray diffraction and UV-vis spectroscopy show that, contrary to the mechanically sheared films, the columns in the zone-cast films are aligned perpendicular to the casting direction. In the films, two LC domains with [20] or [11] reciprocal space vectors perpendicular to the substrate plane are observed. This can be explained by a small lattice mismatch allowing epitaxial growth of the LC domains on each other. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：982 / 985

页数：4

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