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dc.contributor.authorHelseth, Lars Egil
dc.date.accessioned2020-04-20T12:40:44Z
dc.date.available2020-04-20T12:40:44Z
dc.date.issued2019
dc.PublishedHelseth LE. The influence of microscale surface roughness on water-droplet contact electrification. Langmuir. 2019;35(25):8268-8275eng
dc.identifier.issn0743-7463en_US
dc.identifier.issn1520-5827en_US
dc.identifier.urihttps://hdl.handle.net/1956/21940
dc.descriptionUnder embargo until: 29.05.2020
dc.description.abstractWhen water comes in contact with a hydrophobic fluoropolymer, a triboelectric charge tends to form on the surface. Here, it is investigated how the triboelectric charge formed upon contact with water drops depends on the microscale surface statistics of the polymer. In particular, it is found that the transition to a superhydrophobic fakir state results in a considerable reduction in triboelectric contact charge, due to a reduced liquid?solid contact area. Thus, when processing charge-sensitive electronic systems one may want to utilize such surfaces promoting reduced tribocharging. This also has implications for energy harvesting purposes, where one may collect electrical energy by letting water droplets move on the polymer with an interdigitated current-collecting electrode on its back side. In such a situation, it is observed that the surfaces promoting the superhydrophobic fakir state give rise to larger water droplet velocities and smaller collected charge, which explains the need for careful assessment of surface treatment before applying microstructured polymers for water droplet energy harvesting.en_US
dc.language.isoengeng
dc.publisherACSen_US
dc.titleThe influence of microscale surface roughness on water-droplet contact electrificationen_US
dc.typePeer reviewed
dc.typeJournal article
dc.date.updated2020-01-24T14:07:02Z
dc.description.versionacceptedVersionen_US
dc.rights.holderCopyright 2019 American Chemical Societyen_US
dc.identifier.doihttps://doi.org/10.1021/acs.langmuir.9b00988
dc.identifier.cristin1707849
dc.source.journalLangmuir


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