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김대식

Kim, Dai-Sik
Nano Optics Group
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dc.citation.number 3 -
dc.citation.startPage 035304 -
dc.citation.title NANOTECHNOLOGY -
dc.citation.volume 31 -
dc.contributor.author Kim, Sunghwan -
dc.contributor.author Bahk, Young-Mi -
dc.contributor.author Kim, Dasom -
dc.contributor.author Yun, HyeongSeok -
dc.contributor.author Lim, Yi Rang -
dc.contributor.author Song, Wooseok -
dc.contributor.author Kim, Dai-Sik -
dc.date.accessioned 2023-12-21T18:10:22Z -
dc.date.available 2023-12-21T18:10:22Z -
dc.date.created 2019-12-27 -
dc.date.issued 2020-01 -
dc.description.abstract y Arrays of van der Waals gaps were manufactured by synthesizing the vertically aligned graphene layer stacked between two copper (Cu) catalytic films. The Cu-graphene-Cu laminated structure was obtained by directly synthesizing graphene on a patterned Cu film followed by depositing a second copper layer for optical measurements. The synthesis of graphene on the Cu surface was optimized by adjusting the synthesis temperatures and pre-annealing time using plasma enhanced chemical vapor deposition (PECVD). Resonant Raman spectroscopy measurements reveal that graphene can be synthesized on both bulk Cu foil and relatively thin Cu film under the same growth mechanism using PECVD. Structural and optical characterizations of the array of graphene van der Waals gaps were implemented by the transmission electron microscope and terahertz-time domain spectroscopy (THz-TDS). In THz-TDS, the measured THz amplitude transmitted through the graphene van der Waals gap slit array was constant regardless of the gap width determined by the number of graphene layers between the Cu thin films in a single slit. These results imply that the optical dielectric constant of graphene at THz frequencies in the out-of-plane direction is linearly proportional to the gap width. Our results of the manufacturing method can be adopted to investigate mechanical, electrical, and optical properties of other 2D materials such as h-BN, MoS2, and others. Furthermore, metal-graphene-metal structures with vertical orientations can be used in many electronic, optic, and optoelectronic applications. -
dc.identifier.bibliographicCitation NANOTECHNOLOGY, v.31, no.3, pp.035304 -
dc.identifier.doi 10.1088/1361-6528/ab3dd2 -
dc.identifier.issn 0957-4484 -
dc.identifier.scopusid 2-s2.0-85073644680 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/31898 -
dc.identifier.url https://iopscience.iop.org/article/10.1088/1361-6528/ab3dd2 -
dc.identifier.wosid 000501840300004 -
dc.language 영어 -
dc.publisher Institute of Physics Publishing -
dc.title Fabrication of vertical van der Waals gap array using single-and multi-layer graphene -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied -
dc.relation.journalResearchArea Science & Technology - Other Topics; Materials Science; Physics -
dc.type.docType Article -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor graphene synthesis -
dc.subject.keywordAuthor van der Waals gap -
dc.subject.keywordAuthor plasma enhanced chemical vapor deposition -
dc.subject.keywordAuthor Raman spectroscopy -
dc.subject.keywordAuthor terahertz-time domain spectroscopy -
dc.subject.keywordPlus ENHANCED RAMAN-SCATTERING -
dc.subject.keywordPlus SUBNANOMETER GAPS -
dc.subject.keywordPlus CU FOIL -
dc.subject.keywordPlus MONOLAYER -
dc.subject.keywordPlus THICKNESS -
dc.subject.keywordPlus SIZE -

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