Dispersibility and stability improvement of unfunctionalized nanotubes in amide solvents by polymer wrapping

被引：16

作者：

Hasan, T. ^{[1
]}

Scardaci, V. ^{[1
]}

Tan, P. H. ^{[1
]}

Rozhin, A. G. ^{[1
]}

Milne, W. I. ^{[1
]}

Ferrari, A. C. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

SWNTs; dispersion; stability; organic solvent; amide solvent; photoluminescence;

D O I：

10.1016/j.physe.2007.09.161

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Improvement on the stability and loading of unfunctionalized single wall carbon nanotubes (SWNTs) in amide solvents is necessary to enhance the performances of SWNT-polymer composites used for optical applications (e.g., as non-linear saturable absorbers). We show that polyvinylpyrrolidone (PVP) can not only increase the stability of ultrasonically dispersed HiPco SWNTs in pure N-methyl-2-pyrrolidone (NMP), but also improve the photoluminescence emission signals from SWNTs even after I month of incubation. Compared to two non-ionic surfactants (Igepal DM-970 and Pluronic F-98), we find that PVP-aided SWNT dispersions in NMP can improve the SWNT loading by at least four times. Unlike surfactant-aided dispersions, the PVP-aided dispersions remain completely stable by close visual inspection even after 6 months of incubation. (c) 2007 Elsevier B.V. All rights reserved.

引用

收藏

页码：2414 / 2418

页数：5

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