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

详细信息    查看全文

• 作者：Chengmin Jiang ; Avishek Saha ; Changsheng Xiang ; Colin C. Young ; James M. Tour ; Matteo Pasquali ; Angel A. Mart铆
• 刊名：ACS Nano
• 出版年：2013
• 出版时间：May 28, 2013
• 年：2013
• 卷：7
• 期：5
• 页码：4503-4510
• 全文大小：468K
• 年卷期：v.7,no.5(May 28, 2013)
• ISSN：1936-086X

文摘

The solubility of single-walled carbon nanotube (SWCNT) polyelectrolytes [K(THF)]_nSWCNT in dimethyl sulfoxide (DMSO) was determined by a combination of centrifugation, UV鈥搗is 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.

Keywords:

SWCNT polyelectrolytes; crown ethers; liquid crystal; diameter selectivity