A computer simulation study of the anchoring transitions driven by rod-coil amphiphiles at aqueous-liquid crystal interfaces

被引：16

作者：

Zhang, Zunmin ^{[1
]}

Guo, Hongxia ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Chem, BNLMS, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China

来源：

SOFT MATTER | 2012年 / 8卷 / 19期

关键词：

DISSIPATIVE PARTICLE DYNAMICS; ORIENTATION; ADSORPTION; POLYMERS;

D O I：

10.1039/c2sm07342k

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：

Dissipative particle dynamics simulations have been conducted to study the anchoring transitions of nematic liquid crystals in the presence of a rod-coil amphiphilic monolayer at the aqueous-liquid crystal interface. Instead of amphiphile interfacial coverage, the repulsion interaction parameter (a(MR)) between the mesogens and rod blocks of the amphiphiles is used as a tunable and quantitative parameter to control the anchoring transition. Depending on a complicated interplay between the interfacial interactions and the packing effects, we have observed a novel anchoring transition sequence of planar-tilted-homeotropic-tilted-planar when continuously decreasing the value of a(MR).

引用

页码：5168 / 5174

页数：7

共 29 条

[1] Pressure tensor profiles at the isotropic-nematic interface [J].

Allen, MP .

CHEMICAL PHYSICS LETTERS, 2000, 331 (5-6) :513-518

[2] Surfactant-induced nematic wetting layer at a thermotropic liquid crystal/water interface [J].

Bahr, C .

PHYSICAL REVIEW E, 2006, 73 (03)

[3] Surface triple points and multiple-layer transitions observed by tuning the surface field at smectic liquid-crystal-water interfaces [J].

Bahr, Ch. .

PHYSICAL REVIEW LETTERS, 2007, 99 (05)

[4] Recent Advances in Colloidal and Interfacial Phenomena Involving Liquid Crystals [J].

Bai, Yiqun ;

Abbott, Nicholas L. .

LANGMUIR, 2011, 27 (10) :5719-5738

[5] Biomolecular interactions at phospholipid-decorated surfaces of liquid crystals [J].

Brake, JM ;

Daschner, MK ;

Luk, YY ;

Abbott, NL .

SCIENCE, 2003, 302 (5653) :2094-2097

[6] Effect of surfactant structure on the orientation of liquid crystals at aqueous-liquid crystal interfaces [J].

Brake, JM ;

Mezera, AD ;

Abbott, NL .

LANGMUIR, 2003, 19 (16) :6436-6442

[7] An experimental system for imaging the reversible adsorption of amphiphiles at aqueous-liquid crystal interfaces [J].

Brake, JM ;

Abbott, NL .

LANGMUIR, 2002, 18 (16) :6101-6109

[8] Atomistic modelling of liquid-crystal surface modification [J].

Downton, MT ;

Hanna, S .

EUROPHYSICS LETTERS, 2006, 74 (01) :69-75

[9] Computer simulation of liquid-crystal surface modification [J].

Downton, MT ;

Allen, MP .

EUROPHYSICS LETTERS, 2004, 65 (01) :48-54

[10] Nematic-isotropic interfaces in semiflexible polymer blends [J].

Drovetsky, BY ;

Liu, AJ ;

Mak, CH .

JOURNAL OF CHEMICAL PHYSICS, 1999, 111 (09) :4334-4342

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