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다차원 탄소재료 연구단
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The alignment-dependent properties and applications of graphene moiré superstructures on the Ru(0001) surface

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Title
The alignment-dependent properties and applications of graphene moiré superstructures on the Ru(0001) surface
Author(s)
Leining Zhang; Jichen Dong; Zhaoyong Guan; Xiuyun Zhang; Feng Ding
Subject
EPITAXIAL GRAPHENE, ; NANOCLUSTERS, ; ORIENTATION
Publication Date
2020-06
Journal
NANOSCALE, v.12, no.24, pp.12831 - 12839
Publisher
ROYAL SOC CHEMISTRY
Abstract
© 2020 The Royal Society of Chemistry. The moiré superstructure of graphene on a lattice-mismatched metal substrate has profound effects on the electronic properties of graphene and can be used for many applications. Here, we propose to systematically tune the moiré superstructure of graphene on the Ru(0001) surface by rotating the graphene layer. Our study reveals two kinds of graphene moiré superstructures: (i) the ultra-flat graphene layers with height variations of less than 0.1 A for rotation angles greater than 20° that have the same structural and electronic properties everywhere, and (ii) the highly corrugated graphene moiré superstructures with height variations from 0.4 to 1.6 A for rotation angles less than 20°, whose electronic properties are highly modulated by the interaction with the substrate. Moreover, these rotated graphene moiré superstructures can serve as templates to produce matrices of size-tunable metal clusters from a few to ∼100 atoms. This study reveals the causes of the structural fluctuation of moiré superstructures of graphene on the transition metal surface and suggests a pathway to tune graphene's electronic properties for various applications
URI
https://pr.ibs.re.kr/handle/8788114/7814
DOI
10.1039/d0nr02370a
ISSN
2040-3364
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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