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Jichen Dong
다차원 탄소재료 연구단
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Formation of Twinned Graphene Polycrystals

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Title
Formation of Twinned Graphene Polycrystals
Author(s)
Jichen Dong; Dechao Geng; Fengning Liu; Feng Ding
Publication Date
2019-06
Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.58, no.23, pp.7723 - 7727
Publisher
WILEY-V C H VERLAG GMBH
Abstract
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Liquid metals have been widely used as substrates to grow graphene and other 2D materials. On a homogeneous and isotropic liquid surface, a polycrystalline 2D material is formed by coalescence of many randomly nucleated single-crystal islands, and as a result, the domains in a polycrystal are expected to be randomly aligned. Here, we report the unexpected finding that only 30°-twinned graphene polycrystals are grown on a liquid Cu surface. Atomic simulations confirm that the unique domain alignment in graphene polycrystals is due to the free rotation of graphene islands on the liquid Cu surface and the highly stable 30°-grain boundaries in graphene. In-depth analysis predicts 30 types of possible 30°-twinned graphene polycrystals and 27 of them are observed. The revealed formation mechanism of graphene polycrystals on a liquid Cu surface deepens our fundamental understanding on polycrystal growth and could serve as a guideline for the controlled synthesis of 2D materials. (c) 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/5839
ISSN
1433-7851
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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