Predicting the Conditions for Homeotropic Anchoring of Liquid Crystals at a Soft Surface. 4-n-Pentyl-4′-cyanobiphenyl on Alkylsilane Self-Assembled Monolayers

被引：23

作者：

Roscioni, Otello Maria ^{[1
]}

Muccioli, Luca ^{[1
]}

Zannoni, Claudio ^{[1
]}

机构：

[1] Univ Bologna, Dipartimento Chim Ind Toso Montanari, Viale Risorgimento 4, IT-40136 Bologna, Italy

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 13期

关键词：

liquid crystals; molecular-dynamics; self-assembled monolayers; homeotropic alignment; anchoring coefficient; surface science; thin films; organic functional materials; MOLECULAR-DYNAMICS SIMULATIONS; THIN-FILM; ALIGNMENT; ORGANIZATION; ALKANETHIOLS;

D O I：

10.1021/acsami.6b16438

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We: have, studied, using atom stir molecular dynamics simulations, the alignment of the nematic crystal 4-n-penyl-4'-cyariobiphenyl (SCB) on,self-ssembled monolayers (SAMs) formed from octadecyl- -and/or.hexyltrichloro$ilane (0I'S and HTS) attached to glassy silica. We find a planar alignment on OTS at full coverage and, an intermediate":sitriation at partial OTS coverage, because of the penetration of SCB molecules into the monolayer, which also removes the tilt of the OTS SAM. Binary mixtures of HTS and OTS SAMs instead induce homeotropic perpendicular) alignment. A comparison with the existing experimental literature is provided.

引用

页码：11993 / 12002

页数：10

共 5 条

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APPLIED PHYSICS LETTERS, 1996, 69 (13) : 1852 - 1854
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Chiou, DR
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APPLIED PHYSICS LETTERS, 2006, 88 (13)
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Yoo, Heemin
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2008, 235
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BECKMANN, PA
EMSLEY, JW
LUCKHURST, GR
TURNER, DL
MOLECULAR PHYSICS, 1986, 59 (01) : 97 - 125
[5] DIELECTRIC STUDIES OF LIQUID-CRYSTALS UNDER HIGH-PRESSURE .2. LOW-FREQUENCY RELAXATION PROCESS IN 4-N-PENTYL-4'-CYANOBIPHENYL IN RELATION TO THEORIES OF THE NEMATIC STATE
URBAN, S
KREUL, HG
WURFLINGER, A
LIQUID CRYSTALS, 1992, 12 (06) : 921 - 930

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