Shape-Programmed Fabrication and Actuation of Magnetically Active Micropost Arrays

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dc.contributor.authorJeon, Jisooko
dc.contributor.authorPark, Jeong Eunko
dc.contributor.authorPark, Sei Jinko
dc.contributor.authorWon, Sukyoungko
dc.contributor.authorZhao, Hangboko
dc.contributor.authorKim, Sanhako
dc.contributor.authorShim, Bong Supko
dc.contributor.authorUrbas, Augustineko
dc.contributor.authorHart, A. Johnko
dc.contributor.authorKu, Zahyunko
dc.contributor.authorWie, Jeong Jaeko
dc.date.accessioned2020-10-21T01:55:14Z-
dc.date.available2020-10-21T01:55:14Z-
dc.date.created2020-07-24-
dc.date.created2020-07-24-
dc.date.created2020-07-24-
dc.date.created2020-07-24-
dc.date.issued2020-04-
dc.identifier.citationACS APPLIED MATERIALS & INTERFACES, v.12, no.14, pp.17113 - 17120-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10203/276743-
dc.description.abstractMicro- and nanotextured surfaces with reconfigurable textures can enable advancements in the control of wetting and heat transfer, directed assembly of complex materials, and reconfigurable optics, among many applications. However, reliable and programmable directional shape in large scale is significant for prescribed applications. Herein, we demonstrate the self-directed fabrication and actuation of large-area elastomer micropillar arrays, using magnetic fields to both program a shape-directed actuation response and rapidly and reversibly actuate the arrays. Specifically, alignment of magnetic microparticles during casting of micropost arrays with hemicylindrical shapes imparts a deterministic anisotropy that can be exploited to achieve the prescribed, large-deformation bending or twisting of the pillars. The actuation coincides with the finite element method, and we demonstrate reversible, noncontact magnetic actuation of arrays of tens of thousands of pillars over hundreds of cycles, with the bending and twisting angles of up to 72 and 61 degrees, respectively. Moreover, we demonstrate the use of the surfaces to control anisotropic liquid spreading and show that the capillary self-assembly of actuated micropost arrays enables highly complex architectures to be fabricated. The present technique could be scaled to indefinite areas using cost-effective materials and casting techniques, and the principle of shape-directed pillar actuation can be applied to other active material systems.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleShape-Programmed Fabrication and Actuation of Magnetically Active Micropost Arrays-
dc.typeArticle-
dc.identifier.wosid000526583500120-
dc.identifier.scopusid2-s2.0-85083073509-
dc.type.rimsART-
dc.citation.volume12-
dc.citation.issue14-
dc.citation.beginningpage17113-
dc.citation.endingpage17120-
dc.citation.publicationnameACS APPLIED MATERIALS & INTERFACES-
dc.identifier.doi10.1021/acsami.0c01511-
dc.contributor.localauthorKim, Sanha-
dc.contributor.nonIdAuthorJeon, Jisoo-
dc.contributor.nonIdAuthorPark, Jeong Eun-
dc.contributor.nonIdAuthorPark, Sei Jin-
dc.contributor.nonIdAuthorWon, Sukyoung-
dc.contributor.nonIdAuthorZhao, Hangbo-
dc.contributor.nonIdAuthorShim, Bong Sup-
dc.contributor.nonIdAuthorUrbas, Augustine-
dc.contributor.nonIdAuthorHart, A. John-
dc.contributor.nonIdAuthorKu, Zahyun-
dc.contributor.nonIdAuthorWie, Jeong Jae-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthoractuation-
dc.subject.keywordAuthormicropillar-
dc.subject.keywordAuthormagnetic-
dc.subject.keywordAuthorwetting-
dc.subject.keywordAuthorself-assembly-
dc.subject.keywordPlusLIQUID-
dc.subject.keywordPlusMANIPULATION-
dc.subject.keywordPlusPATTERNS-
dc.subject.keywordPlusDRIVEN-
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