Optically- and Thermally-Responsive Programmable Materials Based on Carbon Nanotube-Hydrogel Polymer Composites
| Autor: | Jeffrey J. Urban, Ming C. Wu, Andrew G. Gillies, Hyunhyub Ko, Kuniharu Takei, Ronald S. Fearing, Bryan Edward Schubert, Rizia Bardhan, Xiaobo Zhang, Arash Jamshidi, Cary L. Pint, Ali Javey, Min Hyung Lee |
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| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Nanotube Materials science Mechanical Engineering Response time Bioengineering Nanotechnology General Chemistry Carbon nanotube Polymer Condensed Matter Physics law.invention Condensed Matter::Soft Condensed Matter chemistry.chemical_compound chemistry law Self-healing hydrogels Poly(N-isopropylacrylamide) General Materials Science Thin film Composite material Absorption (electromagnetic radiation) |
| Zdroj: | Nano Letters. 11:3239-3244 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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