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Hydrogen-Assisted Fast Growth of Large Graphene Grains by Recrystallization of Nanograins.

ABSTRACT: Chemical vapor deposition has been highlighted as a promising tool for facile graphene growth in a large area. However, grain boundaries impose detrimental effects on the mechanical strength or electrical mobility of graphene. Here, we demonstrate that high-pressure hydrogen treatment in the preannealing step plays a key role in fast and large grain growth and leads to the successful synthesis of large grain graphene in 10 s. Large single grains with a maximum size of ?160 ?m grow by recrystallization of nanograins, but ?1% areal coverage of nanograins remains with 28-30° misorientation angles. Our findings will provide insights into mass production of high-quality graphene.

SUBMITTER: Lee H

PROVIDER: S-EPMC7745212 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Hydrogen-Assisted Fast Growth of Large Graphene Grains by Recrystallization of Nanograins.

Lee Hyunjong H Baek Jinwook J Dae Kyun Seong KS Jeon Seokwoo S Yuk Jong Min JM

ACS omega 20201202 49

Chemical vapor deposition has been highlighted as a promising tool for facile graphene growth in a large area. However, grain boundaries impose detrimental effects on the mechanical strength or electrical mobility of graphene. Here, we demonstrate that high-pressure hydrogen treatment in the preannealing step plays a key role in fast and large grain growth and leads to the successful synthesis of large grain graphene in 10 s. Large single grains with a maximum size of ∼160 μm grow by recrystalli ...[more]

PMID: 33344801

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