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Ko, Hyunhyub
Functional Nanomaterials & Devices Lab
Research Interests
  • Functional nanomaterials, flexible electronics, electronic skins, wearable sensors

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

Cited 65 times inthomson ciCited 52 times inthomson ci
Title
Optically- and Thermally-Responsive Programmable Materials Based on Carbon Nanotube-Hydrogel Polymer Composites
Author
Zhang, XiaoboPint, Cary L.Lee, Min HyungSchubert, Bryan EdwardJamshidi, ArashTakei, KuniharuKo, HyunhyubGillies, AndrewBardhan, RiziaUrban, Jeffrey J.Wu, MingFearing, RonaldJavey, Ali
Keywords
carbon nanotubes; composites; Poly(N-isopropylacrylamide); programmable actuators; responsive materials
Issue Date
201108
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.11, no.8, pp.3239 - 3244
Abstract
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.
URI
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DOI
http://dx.doi.org/10.1021/nl201503e
ISSN
1530-6984
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