Increased Solubility, Liquid-Crystalline Phase, and Selective Functionalization of Single-Walled Carbon Nanotube Polyelectrolyte Dispersions

The solubility of single-walled carbon nanotube (SWCNT) polyelectrolytes [K(THF)] n SWCNT in dimethyl sulfoxide (DMSO) was determined by a combination of centrifugation, UV–vis spectral properties, and solution extraction. The SWCNT formed a liquid crystal at a concentration above 3.8 mg/mL. Also, c...

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Bibliographic Details
Published inACS nano Vol. 7; no. 5; pp. 4503 - 4510
Main Authors Jiang, Chengmin, Saha, Avishek, Xiang, Changsheng, Young, Colin C, Tour, James M, Pasquali, Matteo, Martí, Angel A
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 28.05.2013
Subjects
Crown ethers
Dimethyl sulfoxide
Dimethyl Sulfoxide - chemistry
Dispersions
Electrolytes - chemistry
Fluorescence
Liquid crystals
Liquid Crystals - chemistry
Models, Molecular
Molecular Conformation
Nanotubes, Carbon - chemistry
Polyelectrolytes
Single wall carbon nanotubes
Solubility
Spectra
crown ethers
diameter selectivity
liquid crystal
SWCNT polyelectrolytes
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Summary:The solubility of single-walled carbon nanotube (SWCNT) polyelectrolytes [K(THF)] n SWCNT in dimethyl sulfoxide (DMSO) was determined by a combination of centrifugation, UV–vis spectral properties, and solution extraction. The SWCNT formed a liquid crystal at a concentration above 3.8 mg/mL. Also, crown ether 18-crown-6 was found to increase the solubility of the SWCNT polyelectrolytes in DMSO. Raman spectroscopy and near-infrared (NIR) fluorescence analyses were applied to study the functionalization of SWCNTs. Small-diameter SWCNTs were found to be preferentially functionalized when the SWCNT polyelectrolytes were dispersed in DMSO.
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ISSN:1936-0851
1936-086X
DOI:10.1021/nn4011544