Asymmetric liquid wetting and spreading on surfaces with slanted micro-pillar arrays

Handle URI:
http://hdl.handle.net/10754/562546
Title:
Asymmetric liquid wetting and spreading on surfaces with slanted micro-pillar arrays
Authors:
Yang, Xiaoming; Zhong, Zhaowei; Li, Erqiang ( 0000-0002-5003-0756 ) ; Wang, Zhihong; Xu, Wenjin; Thoroddsen, Sigurdur T. ( 0000-0001-6997-4311 ) ; Zhang, Xixiang ( 0000-0002-3478-6414 )
Abstract:
Uni-directional liquid spreading on asymmetric silicone-fabricated nanostructured surfaces has recently been reported. In this work, uniformly deflected polydimethylsiloxane (PDMS) micro-pillars covered with silver films were fabricated. Asymmetric liquid wetting and spreading behaviors in a preferential direction were observed on the slanted micro-pillar surfaces and a micro-scale thin liquid film advancing ahead of the bulk liquid droplet was clearly observed by high-speed video imaging. It is found that the slanted micro-pillar array is able to promote or inhibit the propagation of this thin liquid film in different directions by the asymmetric capillary force. The spreading behavior of the bulk liquid was guided and finally controlled by this micro-scale liquid film. Different spreading regimes are defined by the relationship between the liquid intrinsic contact angle and the critical angles, which were determined by the pillar height, pillar deflection angle and inter-pillar spacing. © The Royal Society of Chemistry 2013.
KAUST Department:
Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center; Mechanical Engineering Program; Materials Science and Engineering Program; Core Labs; High-Speed Fluids Imaging Laboratory
Publisher:
Royal Society of Chemistry
Journal:
Soft Matter
Issue Date:
2013
DOI:
10.1039/c3sm51809d
Type:
Article
ISSN:
1744683X
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Physical Sciences and Engineering (PSE) Division; Materials Science and Engineering Program; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorYang, Xiaomingen
dc.contributor.authorZhong, Zhaoweien
dc.contributor.authorLi, Erqiangen
dc.contributor.authorWang, Zhihongen
dc.contributor.authorXu, Wenjinen
dc.contributor.authorThoroddsen, Sigurdur T.en
dc.contributor.authorZhang, Xixiangen
dc.date.accessioned2015-08-03T10:42:08Zen
dc.date.available2015-08-03T10:42:08Zen
dc.date.issued2013en
dc.identifier.issn1744683Xen
dc.identifier.doi10.1039/c3sm51809den
dc.identifier.urihttp://hdl.handle.net/10754/562546en
dc.description.abstractUni-directional liquid spreading on asymmetric silicone-fabricated nanostructured surfaces has recently been reported. In this work, uniformly deflected polydimethylsiloxane (PDMS) micro-pillars covered with silver films were fabricated. Asymmetric liquid wetting and spreading behaviors in a preferential direction were observed on the slanted micro-pillar surfaces and a micro-scale thin liquid film advancing ahead of the bulk liquid droplet was clearly observed by high-speed video imaging. It is found that the slanted micro-pillar array is able to promote or inhibit the propagation of this thin liquid film in different directions by the asymmetric capillary force. The spreading behavior of the bulk liquid was guided and finally controlled by this micro-scale liquid film. Different spreading regimes are defined by the relationship between the liquid intrinsic contact angle and the critical angles, which were determined by the pillar height, pillar deflection angle and inter-pillar spacing. © The Royal Society of Chemistry 2013.en
dc.publisherRoyal Society of Chemistryen
dc.titleAsymmetric liquid wetting and spreading on surfaces with slanted micro-pillar arraysen
dc.typeArticleen
dc.contributor.departmentAdvanced Nanofabrication, Imaging and Characterization Core Laben
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentCore Labsen
dc.contributor.departmentHigh-Speed Fluids Imaging Laboratoryen
dc.identifier.journalSoft Matteren
dc.contributor.institutionSchool of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singaporeen
kaust.authorYang, Xiaomingen
kaust.authorLi, Erqiangen
kaust.authorWang, Zhihongen
kaust.authorThoroddsen, Sigurdur T.en
kaust.authorZhang, Xixiangen
kaust.authorXu, Wenjinen
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