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dc.contributor.authorTuvshindorj, U.en_US
dc.contributor.authorYildirim, A.en_US
dc.contributor.authorOzturk, F. E.en_US
dc.contributor.authorBayındır, Mehmeten_US
dc.date.accessioned2015-07-28T12:02:21Z
dc.date.available2015-07-28T12:02:21Z
dc.date.issued2014en_US
dc.identifier.issn1944-8244
dc.identifier.urihttp://hdl.handle.net/11693/12650
dc.description.abstractThis paper investigates the stability of the Cassie state of wetting in transparent superhydrophobic coatings by comparing a single-layer microporous coating with a double-layer micro/nanoporous coating. Increasing pressure resistance of superhydrophobic coatings is of interest for practical use because high external pressures may be exerted on surfaces during operation. The Cassie state stability against the external pressure of coatings was investigated by squeezing droplets sitting on surfaces with a hydrophobic plate. Droplets on the single-layer coating transformed to the Wenzel state and pinned to the surface after squeezing, whereas droplets on the double-layer micro/nanoporous coating preserved the Cassie state and rolled off the surface easily. In addition, the contact angle and contact-line diameter of water droplets during evaporation from surfaces were in situ investigated to further understand the stability of coatings against Wenzel transition. A droplet on a microporous coating gradually transformed to the Wenzel state and lost its spherical shape as the droplet volume decreased (i.e., the internal pressure of the droplet increased). The contact line of the droplet during evaporation remained almost unchanged. In contrast, a water droplet on a double-layer surface preserved its spherical shape even at the last stages of the evaporation process, where pressure differences as high as a few thousand pascals were generated. For this case, the droplet contact line retracted during evaporation and the droplet recovered the initial water contact angle. The demonstrated method for the preparation of robust transparent superhydrophobic coatings is promising for outdoor applications such as self-cleaning cover glasses for solar cells and nonwetting windows.en_US
dc.language.isoEnglishen_US
dc.source.titleACS Applied Materials and Interfacesen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/am502117aen_US
dc.subjectCassie State Stabilityen_US
dc.subjectSuperhydrophobicen_US
dc.subjectSelf-cleaningen_US
dc.subjectWettabilityen_US
dc.subjectEvaporationen_US
dc.subjectOrganically Modified Silicaen_US
dc.titleRobust cassie state of wetting in transparent superhydrophobic coatingsen_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.citation.spage9680en_US
dc.citation.epage9688en_US
dc.citation.volumeNumber6en_US
dc.citation.issueNumber12en_US
dc.identifier.doi10.1021/am502117aen_US
dc.publisherAmerican Chemical Societyen_US
dc.contributor.bilkentauthorBayındır, Mehmet


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