Letter

Light-Controlled Graphene-Elastin Composite Hydrogel Actuators

Department of Bioengineering, University of California, Berkeley, Berkeley, California 94720, United States
Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
Nano Lett., 2013, 13 (6), pp 2826–2830
DOI: 10.1021/nl401088b
Publication Date (Web): May 6, 2013
Copyright © 2013 American Chemical Society

Abstract

Abstract Image

Hydrogels actuators (HAs) that can reversibly respond to stimuli have applications in diverse fields. However, faster response rates and improved control over actuation timing and location are required to fulfill their potential. To address these criteria, we synthesized near-infrared light-driven HAs by interfacing genetically engineered elastin-like polypeptides with reduced-graphene oxide sheets. The resulting nanocomposites exhibited rapid and tunable motions controlled by light position, intensity, and path, including finger-like flexing and crawling. This work demonstrates the ability of rationally designed proteins to be combined with synthetic nanoparticles for the creation of macroscale functional materials.

ELP sequences, characterization, and binding data; hybrid nanoparticle colloidal stability and organic solvent dispersibility data; hydrogel fatigue and patterning data; hydrogel actuation movies; and detailed experimental methods. This material is available free of charge via the Internet at http://pubs.acs.org.

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Article Views: 7,960 Times
Received 25 March 2013
Published online 6 May 2013
Published in print 12 June 2013
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