Optically- and Thermally-Responsive Programmable Materials Based on Carbon Nanotube-Hydrogel Polymer Composites

被引：458

作者：

Zhang, Xiaobo ^{[1
,2
]}

Pint, Cary L. ^{[1
,2
]}

Lee, Min Hyung ^{[1
,2
]}

Schubert, Bryan Edward

Jamshidi, Arash ^{[1
]}

Takei, Kuniharu ^{[1
,2
]}

Ko, Hyunhyub ^{[1
,2
]}

Gillies, Andrew

Bardhan, Rizia ^{[3
]}

Urban, Jeffrey J. ^{[3
]}

Wu, Ming ^{[1
]}

Fearing, Ronald

Javey, Ali ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 08期

关键词：

Poly(N-isopropylacrylamide); carbon nanotubes; programmable actuators; composites; responsive materials; SHAPE-MEMORY POLYMERS; N-ISOPROPYLACRYLAMIDE; ARTIFICIAL MUSCLES; ACTUATORS; ELASTOMERS; DRIVEN; LIGHT; WATER; GELS;

D O I：

10.1021/nl201503e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simple approach is described to fabricate reversible, thermally- and optically responsive actuators utilizing composites of poly(N-isopropylacrylamide) (pNIPAM) loaded with single-walled carbon nanotubes. With nanotube loading at concentrations of 0.75 mg/mL, we demonstrate up to 5 times enhancement to the thermal response time of the nanotube-pNIPAM hydrogel actuators caused by the enhanced mass transport of water molecules. Additionally, we demonstrate the ability to obtain ultrafast near-infrared optical response in nanotube-pNIPAM hydrogels under laser excitation enabled by the strong absorption properties of nanotubes. The work opens the framework to design complex and programmable self-folding materials, such as cubes and flowers, with advanced built-in features, including tunable response time as determined by the nanotube loading.

引用

页码：3239 / 3244

页数：6

共 34 条

[1] Structure-assigned optical spectra of single-walled carbon nanotubes [J].