Improving the Effectiveness of Interfacial Trapping in Removing Single-Walled Carbon Nanotube Bundles

被引：36

作者：

Wang, Randy K. ^{[1
]}

Park, Hyun-Ok ^{[1
]}

Chen, Wei-Chiang ^{[1
]}

Silvera-Batista, Carlos ^{[1
]}

Reeves, Ryan D. ^{[1
]}

Butler, Jason E. ^{[1
]}

Ziegler, Kirk J. ^{[1
,2
]}

机构：

[1] Univ Florida, Dept Chem Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Ctr Surface Sci & Engn, Gainesville, FL 32611 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2008年 / 130卷 / 44期

关键词：

D O I：

10.1021/ja804982b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single-walled carbon nanotube (SWNT) bundles are selectively removed from an aqueous dispersion containing individually suspended carbon nanotubes coated with gum Arabic via interfacial trapping. The suspensions are characterized with absorbance, fluorescence, and Raman spectroscopy as well as atomic force microscopy (AFM) and rheology. The resulting aqueous suspensions have better dispersion quality after interfacial trapping and can be further improved by altering the processing conditions. A two-step extraction process offers a simple and fast approach to preparing high-quality dispersions of individual SWNTs comparable to ultracentrifugation. Partitioning of SWNTs to the liquid-liquid interface is described by free energy changes. SWNT bundles prefer to reside at the interface over individually suspended SWNTs because of greater free energy changes.

引用

页码：14721 / 14728

页数：8

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