The Removal of Metallic Single-Walled Carbon Nanotubes Using an Aqueous Two-Phase System

被引：10

作者：

Tang, Malcolm S. Y. ^{[1
]}

Whitcher, T. J. ^{[1
]}

Yeoh, K. H. ^{[1
]}

Chua, C. L. ^{[1
]}

Woon, K. L. ^{[1
]}

Show, P. L. ^{[3
]}

Lin, Y. K. ^{[2
]}

Ling, T. C. ^{[2
]}

机构：

[1] Univ Malaya, Fac Sci, Dept Phys, Low Dimens Mat Res Ctr, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Fac Sci, Inst Biol Sci, Kuala Lumpur 50603, Malaysia

[3] Univ Nottingham, Dept Chem & Environm Engn, Jalan Broga 43500, Semenyih Selang, Malaysia

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2014年 / 14卷 / 05期

关键词：

Carbon Nanotube; Aqueous Two Phase; Purification; FIELD-EFFECT TRANSISTORS; SELECTIVE REMOVAL; SEPARATION; DISPERSION; SPECTROSCOPY; DISSOLUTION; FABRICATION; ELECTRODES; SENSORS; ARRAYS;

D O I：

10.1166/jnn.2014.8680

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here we report our findings on the removal of metallic single-walled carbon nanotubes using an aqueous two-phase system. The aqueous two-phase system contained as received carbon nanotubes, polyethylene glycol, dextran, N-methylpyrrolidone, cetyltrimethylammonium bromide, and water which phase separated into top and bottom phases. The top phase was dominated by polyethylene glycol whereas the bottom phase was dominated by dextran. The dextran-rich phase contained more semiconducting species while metallic species was more abundant in the polyethylene glycol rich-phase. It was found via Fourier-Transform Infrared Spectroscopy that cetyltrimethylammonium bromide only present in the dextran-rich phase. A selectivity mechanism is tentatively proposed and discussed.

引用

页码：3398 / 3402

页数：5

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