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dc.contributor.authorLee, Wei Li
dc.contributor.authorLow, Hong Yee
dc.date.accessioned2016-06-08T14:25:23Z
dc.date.available2016-06-08T14:25:23Z
dc.date.issued2016-03
dc.date.submitted2016-02
dc.identifier.issn2045-2322
dc.identifier.urihttp://hdl.handle.net/1721.1/103052
dc.description.abstractMicro- and nanoscale surface textures, when optimally designed, present a unique approach to improve surface functionalities. Coupling surface texture with shape memory polymers may generate reversibly tuneable surface properties. A shape memory polyetherurethane is used to prepare various surface textures including 2 μm- and 200 nm-gratings, 250 nm-pillars and 200 nm-holes. The mechanical deformation via stretching and recovery of the surface texture are investigated as a function of length scales and shapes. Results show the 200 nm-grating exhibiting more deformation than 2 μm-grating. Grating imparts anisotropic and surface area-to-volume effects, causing different degree of deformation between gratings and pillars under the same applied macroscopic strain. Full distribution of stress within the film causes the holes to deform more substantially than the pillars. In the recovery study, unlike a nearly complete recovery for the gratings after 10 transformation cycles, the high contribution of surface energy impedes the recovery of holes and pillars. The surface textures are shown to perform a switchable wetting function. This study provides insights into how geometric features of shape memory surface patterns can be designed to modulate the shape programming and recovery, and how the control of reversibly deformable surface textures can be applied to transfer microdroplets.en_US
dc.description.sponsorshipSUTD-MIT International Design Centre (IDC) (Postdoctoral Fellowship)en_US
dc.language.isoen_US
dc.publisherSpringer Natureen_US
dc.relation.isversionofhttp://dx.doi.org/10.1038/srep23686en_US
dc.rightsCreative Commons Attributionen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceNature Publishing Groupen_US
dc.titleGeometry- and Length Scale-Dependent Deformation and Recovery on Micro- and Nanopatterned Shape Memory Polymer Surfacesen_US
dc.typeArticleen_US
dc.identifier.citationLee, Wei Li, and Hong Yee Low. “Geometry- and Length Scale-Dependent Deformation and Recovery on Micro- and Nanopatterned Shape Memory Polymer Surfaces.” Scientific Reports 6 (March 30, 2016): 23686.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Materials Science and Engineeringen_US
dc.contributor.mitauthorLee, Wei Lien_US
dc.relation.journalScientific Reportsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsLee, Wei Li; Low, Hong Yeeen_US
dspace.embargo.termsNen_US
mit.licenseOPEN_ACCESS_POLICYen_US
mit.metadata.statusComplete


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