Lyotropic Liquid-Crystalline Solutions of High-Concentration Dispersions of Single-Walled Carbon Nanotubes with Conjugated Polymers

被引：47

作者：

Lee, Hang Woo ^{[1
]}

You, Wei ^{[1
]}

Barman, Soumendra ^{[1
]}

Hellstrom, Sondra ^{[1
]}

LeMieux, Melburne C. ^{[1
]}

Oh, Joon Hak ^{[1
]}

Liu, Shuhong ^{[1
]}

Fujiwara, Takenori ^{[1
]}

Wang, Wechung Maria ^{[1
]}

Chen, Bin ^{[2
]}

Jin, Yong Wan ^{[3
]}

Kim, Jong Min ^{[3
]}

Bao, Zhenan ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

[2] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

[3] Samsung Adv Inst Technol, Younggin Si Gyunggi Do 449712, South Korea

来源：

SMALL | 2009年 / 5卷 / 09期

关键词：

alignment; carbon nanotubes; conjugated polymers; lyotropic liquid crystals; THIN-FILM TRANSISTORS; OPTICAL-PROPERTIES; SEPARATION; SOLUBILIZATION; MORPHOLOGY; ALIGNMENT; NETWORKS; DEVICES; ARRAYS; WATER;

D O I：

10.1002/smll.200800640

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A high-concentration dispersion of single-walled carbon nanotubes (SWNT) in an organic solvent enabled by conjugated polymers was reported. The solubilization of SWNTs into various organic solvents by using a series of conjugated polymers with different electronic properties and regioregularities was studied. The results show that high dispersion concentrations of more than 2 mg mL-1 for both HiPco and arc-discharge SWNTs are possible with polythiophenes and polyphenylene vinylene (PPV). The SWNT/polymer composites resemble rigid-rod polymers, and the side chains from the conjugated polymers used to disperse these SWNTs act as the corresponding solubilizing hair. The absorption intensity of SWNT is found to be higher for light polarized parallel instead of perpendicular to the shearing direction, indicating that both the polymer backbones and SWNTs are aligned along the shearing direction.

引用

页码：1019 / 1024

页数：6

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