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  • Title: Multi-stimuli-responsive programmable biomimetic actuator.
    Author: Dong Y, Wang J, Guo X, Yang S, Ozen MO, Chen P, Liu X, Du W, Xiao F, Demirci U, Liu BF.
    Journal: Nat Commun; 2019 Sep 09; 10(1):4087. PubMed ID: 31501430.
    Abstract:
    Untethered small actuators have various applications in multiple fields. However, existing small-scale actuators are very limited in their intractability with their surroundings, respond to only a single type of stimulus and are unable to achieve programmable structural changes under different stimuli. Here, we present a multiresponsive patternable actuator that can respond to humidity, temperature and light, via programmable structural changes. This capability is uniquely achieved by a fast and facile method that was used to fabricate a smart actuator with precise patterning on a graphene oxide film by hydrogel microstamping. The programmable actuator can mimic the claw of a hawk to grab a block, crawl like an inchworm, and twine around and grab the rachis of a flower based on their geometry. Similar to the large- and small-scale robots that are used to study locomotion mechanics, these small-scale actuators can be employed to study movement and biological and living organisms.
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