Cholesteric and Nematic Liquid Crystalline Phase Behavior of Double-Stranded DNA Stabilized Single-Walled Carbon Nanotube Dispersions

被引：49

作者：

Ao, Geyou ^{[1
]}

Nepal, Dhriti ^{[1
]}

Aono, Michelle ^{[2
]}

Davis, Virginia A. ^{[1
]}

机构：

[1] Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA

[2] Auburn Univ, Coll Vet Med, Auburn, AL 36849 USA

来源：

ACS NANO | 2011年 / 5卷 / 02期

基金：

美国国家科学基金会;

关键词：

single-walled carbon nanotubes; double-stranded DNA; cholesteric liquid crystal; phase behavior; ELECTROSTATIC INTERACTION; FIBERS; SUSPENSIONS; FILMS; FLUORESCENCE; ORGANIZATION; SPHERES;

D O I：

10.1021/nn103225r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The first lyotropic cholesteric single-walled carbon nanotube (SWNT) liquid crystal phase was obtained by dispersing SWNTs in an aqueous solution of double-stranded DNA (dsDNA). Depending on the dispersion methodology, the polydomain nematic phase previously reported for other lyotropic carbon nanotube dispersions could also be obtained. The phase behavior and dispersion microstructure were affected by the relative concentrations of dsDNA and SWNT and whether small bundles were removed prior to concentrating the dispersions. This readily controlled phase behavior opens new routes for producing SWNT films with controlled morphology.

引用

页码：1450 / 1458

页数：9

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[1] Entropically driven microphase transitions in mixtures of colloidal rods and spheres [J].