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dc.contributor.authorGregg, A
dc.contributor.authorDe Volder, MFL
dc.contributor.authorBaumberg, JJ
dc.date.accessioned2022-03-26T00:30:42Z
dc.date.available2022-03-26T00:30:42Z
dc.date.issued2022
dc.identifier.issn2195-1071
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/335356
dc.description.abstractOver the past decades, functional hydrogels that respond to a variety of mechanical and chemical stimuli with a volume change of more than 100% have been developed. Despite this impressive behavior, practical applications of conventional hydrogels are limited by the need to transform their isotropic swelling/contraction into useful deformations, as well as their slow response times. Here, these challenges are addressed by combining poly(N-isopropylacrylamide) (PNIPAM), a widely used temperature-responsive polymer, with carbon nanotubes (CNTs). To ensure strong PNIPAM-CNT cohesion, the hydrogel is synthesized directly on the CNT surfaces using in-situ redox polymerization. The anisotropy of vertically-aligned CNT forests is used to transform the isotropic (de)swelling of PNIPAM into anisotropic motion. This material combination is particularly attractive because the high optical absorption and heat conductivity of carbon nanotubes converts light irradiation into PNIPAM actuation. A wide variety of CNT-skeleton microstructures are tested to reveal a range of actuation behaviors. We demonstrate fast reversible movement, active switching from low to high light absorption states, lattice shape changes, and good cycling stability.
dc.description.sponsorshipERC
dc.publisherWiley
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleLight-Actuated Anisotropic Microactuators from CNT/Hydrogel Nanocomposites
dc.typeArticle
dc.publisher.departmentDepartment of Physics Student
dc.date.updated2022-03-25T11:36:48Z
prism.publicationNameAdvanced Optical Materials
dc.identifier.doi10.17863/CAM.82788
dcterms.dateAccepted2022-03-25
rioxxterms.versionofrecord10.1002/adom.202200180
rioxxterms.versionVoR
dc.contributor.orcidBaumberg, JJ [0000-0002-9606-9488]
dc.identifier.eissn2195-1071
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEPSRC (2338185)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (883703)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Research Infrastructures (RI) (861950)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/N016920/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L015978/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L027151/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/S022953/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P029426/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R020965/1)
cam.issuedOnline2022-05-11
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.82776
cam.orpheus.successWed May 25 11:13:27 BST 2022 - Embargo updated
cam.orpheus.counter3
cam.depositDate2022-03-25
pubs.licence-identifierapollo-deposit-licence-2-1
pubs.licence-display-nameApollo Repository Deposit Licence Agreement


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International