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Liyan Zhu
다차원 탄소재료 연구단
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How the moiré superstructure determines the formation of highly stable graphene quantum dots on Ru(0001) surface

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Title
How the moiré superstructure determines the formation of highly stable graphene quantum dots on Ru(0001) surface
Author(s)
Liyan Zhu; Feng Ding
Publication Date
2019-05
Journal
NANOSCALE HORIZONS, v.4, no.3, pp.625 - 633
Publisher
Royal society Chemistry
Abstract
© The Royal Society of Chemistry. Highly stable graphene quantum dots (HSGQDs) are widely observed in the initial stages of graphene chemical vapor deposition (CVD) growth on lattice-mismatched transition metal surfaces, e.g. Ru(0001), but their formation mechanism has so far remained a mystery. Using a combination of density functional theory calculations and theoretical modeling, we show that the sizes and the morphologies of HSGQDs are determined by the interaction of the graphene edge to the metal substrate interaction, which in turn, is modulated by the moiré superstructure, while the relatively weak interaction of the central atoms of graphene (or graphene bulk atoms (GB)) with the substrate plays a secondary role. The theoretical understanding of the effect of moiré superstructure on graphene CVD growth allows us to predict the formation of HSGQDs on various metal surfaces and provides a guideline to select the best catalyst for graphene growth. ©The Royal Society of Chemistry 2019
URI
https://pr.ibs.re.kr/handle/8788114/5843
ISSN
2055-6756
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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