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다차원 탄소재료 연구단
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Growth and Selective Etching of Twinned Graphene on Liquid Copper Surface

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Title
Growth and Selective Etching of Twinned Graphene on Liquid Copper Surface
Author(s)
Fengning Liu; Jichen Dong; Na Yeon Kim; Zonghoon Lee; Feng Ding
Publication Date
2021-10-01
Journal
Small, v.17, no.40
Publisher
John Wiley and Sons Inc
Abstract
© 2021 Wiley-VCH GmbH Although grain boundaries (GBs) in two-dimensional (2D) materials have been extensively observed and characterized, their formation mechanism still remains unexplained. Here a general model has reported to elucidate the mechanism of formation of GBs during 2D materials growth. Based on our model, a general method is put forward to synthesize twinned 2D materials on a liquid substrate. Using graphene growth on liquid Cu surface as an example, the growth of twinned graphene has been demonstrated successfully, in which all the GBs are ultra-long straight twin boundaries. Furthermore, well-defined twin boundaries (TBs) are found in graphene that can be selectively etched by hydrogen gas due to the preferential adsorption of hydrogen atoms at high-energy twins. This study thus reveals the formation mechanism of GBs in 2D materials during growth and paves the way to grow various 2D nanostructures with controlled GBs.
URI
https://pr.ibs.re.kr/handle/8788114/10356
DOI
10.1002/smll.202103484
ISSN
1613-6810
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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