Antidurotaxis Droplet Motion onto Gradient Brush Substrates

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dc.contributor.authorKajouri, Russellcs
dc.contributor.authorTheodorakis, Panagiotis E.cs
dc.contributor.authorŽídek, Jancs
dc.contributor.authorMilchev, Andreycs
dc.coverage.issue43cs
dc.coverage.volume39cs
dc.date.issued2023-09-06cs
dc.description.abstractDurotaxis motion is a spectacular phenomenon manifesting itself by the autonomous motion of a nano-object between parts of a substrate with different stiffness. This motion usually takes place along a stiffness gradient from softer to stiffer parts of the substrate. Here, we propose a new design of a polymer brush substrate that demonstrates antidurotaxis droplet motion, that is, droplet motion from stiffer to softer parts of the substrate. By carrying out extensive molecular dynamics simulation of a coarse-grained model, we find that antidurotaxis is solely controlled by the gradient in the grafting density of the brush and is favorable for fluids with a strong attraction to the substrate (low surface energy). The driving force of the antidurotaxial motion is the minimization of the droplet-substrate interfacial energy, which is attributed to the penetration of the droplet into the brush. Thus, we anticipate that the proposed substrate design offers a new understanding and possibilities in the area of autonomous motion of droplets for applications in microfluidics, energy conservation, and biology.en
dc.formattextcs
dc.format.extent15285-15296cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationLangmuir. 2023, vol. 39, issue 43, p. 15285-15296.en
dc.identifier.doi10.1021/acs.langmuir.3c01999cs
dc.identifier.issn1520-5827cs
dc.identifier.other187490cs
dc.identifier.urihttp://hdl.handle.net/11012/245068
dc.language.isoencs
dc.publisherAmerican Chemical Societycs
dc.relation.ispartofLangmuircs
dc.relation.urihttps://pubs.acs.org/doi/10.1021/acs.langmuir.3c01999cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1520-5827/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectTRANSPORTen
dc.subjectSURFACESen
dc.subjectDRIVENen
dc.subjectMASSen
dc.subjectDUROTAXISen
dc.subjectGRAPHENEen
dc.titleAntidurotaxis Droplet Motion onto Gradient Brush Substratesen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-187490en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:51:23en
sync.item.modts2025.01.17 16:52:17en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé polymerní materiály a kompozitcs
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Pokročilé polymerní materiály a kompozit