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그래핀을 통한 기판 표면의 결정 정보 투과 현상
Lattice transparency of graphene

DC Field Value Language
dc.contributor.advisor김연상-
dc.contributor.author채시은-
dc.date.accessioned2017-10-31T08:21:54Z-
dc.date.available2017-10-31T08:21:54Z-
dc.date.issued2017-08-
dc.identifier.other000000145104-
dc.identifier.urihttps://hdl.handle.net/10371/137960-
dc.description학위논문 (석사)-- 서울대학교 융합과학기술대학원 융합과학부, 2017. 8. 김연상.-
dc.description.abstractHere, we demonstrated the transparency of graphene to the atomic arrangement of a substrate surface, i.e., the lattice transparency of graphene, by using hydrothermally grown ZnOnanorods as a model system. The growth behaviors of ZnO nanocrystals on graphene-coated and uncoated substrates with various crystal structures were investigated. The atomic arrangements of the nucleating ZnO nanocrystals exhibited a close match with those of the respective substrates despite the substrates being bound to the other side of the graphene. By using first-principles calculations based on density functional theory, we confirmed the energetic favorability of the nucleating phase following the atomic arrangement of the substrate even with the graphene layer present in between. We also found thatthe lattice transparency depends critically on its interface with a supporting substrate. Graphene showed lattice transparency when supported on an atomically flat substrate whereas it became completely opaque when suspended on a substrate with nanoscale topography. In addition to transmitting information about the atomic lattice of the substrate, graphene also protected its surface. This dual role enabled the hydrothermal growth of ZnOnanorods on a Cu substrate, which otherwise dissolved in the reaction conditions when graphene was absent.-
dc.description.tableofcontentsChapter 1. Introduction 1
Chapter 2. Experimental methods 4
2.1 Preparation of various supporting substrates 4
2.2 Synthesis of graphene and transfer graphene onto the target substrates 4
2.3 Synthesis of ZnO nanocrystals 5
Chapter 3. Results and discussion 6
3.1 Growth of ZnOnanorod for 2 hrs on a variety of substrates, each with and without a monolayer graphene coating 6
3.2 Nucleation of ZnO nanocrystals on a variety of graphene coated substrates 7
3.3 The atomic interface in the ZnO nucleus/graphene/ZnO substrate composite investigated by performing HRTEM 9
3.4 The effect of graphene layers on the transparency of graphene 10
3.5 Investigation of lattice transparency of graphene by DFT calculation 11
3.6 The role of substrate morphology in the transparency of graphene 15
Chapter 4. Conclusion 33
Reference 25
Figures 31
Publication List 52
초록 (국문) 53
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dc.formatapplication/pdf-
dc.format.extent6560601 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 융합과학기술대학원-
dc.subjectgraphene-
dc.subjecttransparency-
dc.subjecthydrothermal growth-
dc.subjectlattice-
dc.subjectZnO nanorod-
dc.subject.ddc620.5-
dc.title그래핀을 통한 기판 표면의 결정 정보 투과 현상-
dc.title.alternativeLattice transparency of graphene-
dc.typeThesis-
dc.contributor.AlternativeAuthorSieun Chae-
dc.description.degreeMaster-
dc.contributor.affiliation융합과학기술대학원 융합과학부-
dc.date.awarded2017-08-
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Graduate School of Convergence Science and Technology (융합과학기술대학원)Dept. of Transdisciplinary Studies(융합과학부)Theses (Master's Degree_융합과학부)
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