Thermally switchable one- and two-dimensional arrays of single-walled carbon nanotubes in a polymeric system

Changwoo Doe; Hyung Sik Jang; Tae Hwan Kim; Steven R. Kline; Sung Min Choi

doi:10.1021/ja9073479

Thermally switchable one- and two-dimensional arrays of single-walled carbon nanotubes in a polymeric system

Changwoo Doe, Hyung Sik Jang, Tae Hwan Kim, Steven R. Kline, Sung Min Choi

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Abstract

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.

Original language	English
Pages (from-to)	16568-16572
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	131
Issue number	45
DOIs	https://doi.org/10.1021/ja9073479
State	Published - 2009

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abstract = "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.",

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AU - Doe, Changwoo

AU - Jang, Hyung Sik

AU - Kim, Tae Hwan

AU - Kline, Steven R.

AU - Choi, Sung Min

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AB - 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.

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Thermally switchable one- and two-dimensional arrays of single-walled carbon nanotubes in a polymeric system

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