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다차원 탄소재료 연구단
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Wafer-scale single-crystal monolayer graphene grown on sapphire substrate

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Title
Wafer-scale single-crystal monolayer graphene grown on sapphire substrate
Author(s)
Li, Junzhu; Chen, Mingguang; Samad, Abdus; Dong, Haocong; Ray, Avijeet; Zhang, Junwei; Jiang, Xiaochuan; Schwingenschlögl, Udo; Domke, Jari; Chen, Cailing; Han, Yu; Fritz, Torsten; Rodney S. Ruoff; Tian, Bo; Zhang, Xixiang
Publication Date
2022-07
Journal
Nature Materials, v.21, no.7, pp.740 - 747
Publisher
Nature Research
Abstract
© 2022, The Author(s), under exclusive licence to Springer Nature Limited.The growth of inch-scale high-quality graphene on insulating substrates is desirable for electronic and optoelectronic applications, but remains challenging due to the lack of metal catalysis. Here we demonstrate the wafer-scale synthesis of adlayer-free ultra-flat single-crystal monolayer graphene on sapphire substrates. We converted polycrystalline Cu foil placed on Al2O3(0001) into single-crystal Cu(111) film via annealing, and then achieved epitaxial growth of graphene at the interface between Cu(111) and Al2O3(0001) by multi-cycle plasma etching-assisted–chemical vapour deposition. Immersion in liquid nitrogen followed by rapid heating causes the Cu(111) film to bulge and peel off easily, while the graphene film remains on the sapphire substrate without degradation. Field-effect transistors fabricated on as-grown graphene exhibited good electronic transport properties with high carrier mobilities. This work breaks a bottleneck of synthesizing wafer-scale single-crystal monolayer graphene on insulating substrates and could contribute to next-generation graphene-based nanodevices.
URI
https://pr.ibs.re.kr/handle/8788114/11913
DOI
10.1038/s41563-021-01174-1
ISSN
1476-1122
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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