Optically- and Thermally-Responsive Programmable Materials Based on Carbon Nanotube-Hydrogel Polymer Composites
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- Optically- and Thermally-Responsive Programmable Materials Based on Carbon Nanotube-Hydrogel Polymer Composites
- Zhang, Xiaobo; Pint, Cary L.; Lee, Min Hyung; Schubert, Bryan Edward; Jamshidi, Arash; Takei, Kuniharu; Ko, Hyunhyub; Gillies, Andrew; Bardhan, Rizia; Urban, Jeffrey J.; Wu, Ming; Fearing, Ronald; Javey, Ali
- carbon nanotubes; composites; Poly(N-isopropylacrylamide); programmable actuators; responsive materials
- Issue Date
- AMER CHEMICAL SOC
- NANO LETTERS, v.11, no.8, pp.3239 - 3244
- 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.
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