Thermally Switchable One- and Two-Dimensional Arrays of Single-Walled Carbon Nanotubes in a Polymeric System

被引：27

作者：

Doe, Changwoo ^{[1
]}

Jang, Hyung-Sik ^{[1
]}

Kim, Tae-Hwan ^{[1
]}

Kline, Steven R. ^{[2
]}

Choi, Sung-Min ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Taejon 305701, South Korea

[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 45期

关键词：

ANGLE NEUTRON-SCATTERING; TRIBLOCK COPOLYMERS; AQUEOUS-SOLUTIONS; BLOCK-COPOLYMERS; FILM; COMPOSITES; MESOPHASES; DEPOSITION; MIXTURES; LAMELLAR;

D O I：

10.1021/ja9073479

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fabrication of highly ordered arrays of single-walled carbon nanotubes (SWNTs) has been of great interest for a wide range of potential applications. Here, we report thermally switchable one- and two-dimensional arrays of individually isolated SWNTs formed by cooperative self-assembly of functionalized SWNTs and a block copolymer/water system. Small-angle X-ray scattering measurements reveal that when the block copolymer/water system is in an isotropic phase, two-dimensional hexagonal arrays of SWNTs are formed by depletion attraction, and when the block copolymer/water system is in a lamellar phase, one-dimensional lattices of SWNTs intercalated in the polar regions of the polymeric lamellar structure are formed by entropically driven segregation and two-dimensional depletion attraction. These two SWNT arrays are thermally interchangeable, following the temperature-dependent phase behavior of the block copolymer/water system.

引用

页码：16568 / 16572

页数：5

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