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김성엽

Kim, Sung Youb
Computational Advanced Nanomechanics Lab.
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dc.citation.number 30 -
dc.citation.startPage 1800022 -
dc.citation.title ADVANCED MATERIALS -
dc.citation.volume 30 -
dc.contributor.author Kwak, Jinsung -
dc.contributor.author Kim, Se-Yang -
dc.contributor.author Jo, Yongsu -
dc.contributor.author Kim, Na Yeon -
dc.contributor.author Kim, Sung Youb -
dc.contributor.author Lee, Zonghoon -
dc.contributor.author Kwon, Soon-Yong -
dc.date.accessioned 2023-12-21T20:38:22Z -
dc.date.available 2023-12-21T20:38:22Z -
dc.date.created 2018-05-23 -
dc.date.issued 2018-07 -
dc.description.abstract Graphene has recently attracted particular interest as a flexible barrier film preventing permeation of gases and moistures. However, it has been proved to be exceptionally challenging to develop large-scale graphene films with little oxygen and moisture permeation suitable for industrial uses, mainly due to the presence of nanometer-sized defects of obscure origins. Here, the origins of water permeable routes on graphene-coated Cu foils are investigated by observing the micrometer-sized rusts in the underlying Cu substrates, and a site-selective passivation method of the nanometer-sized routes is devised. It is revealed that nanometer-sized holes or cracks are primarily concentrated on graphene wrinkles rather than on other structural imperfections, resulting in severe degradation of its water impermeability. They are found to be predominantly induced by the delamination of graphene bound to Cu as a release of thermal stress during the cooling stage after graphene growth, especially at the intersection of the Cu step edges and wrinkles owing to their higher adhesion energy. Furthermore, the investigated routes are site-selectively passivated by an electron-beam-induced amorphous carbon layer, thus a substantial improvement in water impermeability is achieved. This approach is likely to be extended for offering novel barrier properties in flexible films based on graphene and on other atomic crystals. -
dc.identifier.bibliographicCitation ADVANCED MATERIALS, v.30, no.30, pp.1800022 -
dc.identifier.doi 10.1002/adma.201800022 -
dc.identifier.issn 0935-9648 -
dc.identifier.scopusid 2-s2.0-85050401900 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/24139 -
dc.identifier.url https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201800022 -
dc.identifier.wosid 000439737700005 -
dc.language 영어 -
dc.publisher WILEY-V C H VERLAG GMBH -
dc.title Unraveling the Water Impermeability Discrepancy in CVD-Grown Graphene -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter -
dc.relation.journalResearchArea Chemistry; Science & Technology - Other Topics; Materials Science; Physics -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor chemical vapor deposition -
dc.subject.keywordAuthor flexible barrier film -
dc.subject.keywordAuthor graphene wrinkles -
dc.subject.keywordAuthor site-selective passivation -
dc.subject.keywordAuthor water impermeability -
dc.subject.keywordPlus CHEMICAL-VAPOR-DEPOSITION -
dc.subject.keywordPlus CARBON NANOTUBES -
dc.subject.keywordPlus MONOLAYER GRAPHENE -
dc.subject.keywordPlus INTRINSIC DEFECTS -
dc.subject.keywordPlus ADHESION ENERGY -
dc.subject.keywordPlus FILMS -
dc.subject.keywordPlus NANORIBBONS -
dc.subject.keywordPlus PERMEATION -
dc.subject.keywordPlus TRANSPORT -
dc.subject.keywordPlus MEMBRANES -

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