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Ding, Feng
IBS - Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Theoretical methods development for materials studies.

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How the moire superstructure determines the formation of highly stable graphene quantum dots on Ru(0001) surface

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Title
How the moire superstructure determines the formation of highly stable graphene quantum dots on Ru(0001) surface
Author
Zhu, LiyanDing, Feng
Issue Date
2019-05
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE HORIZONS, v.4, no.3, pp.625 - 633
Abstract
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 moire 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 moire 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.
URI
https://scholarworks.unist.ac.kr/handle/201301/27207
URL
https://pubs.rsc.org/en/content/articlelanding/2019/NH/C8NH00383A#!divAbstract
DOI
10.1039/c8nh00383a
ISSN
2055-6756
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