Formation Mechanism, Growth Kinetics, and Stability Limits of Graphene Adlayers in Metal-Catalyzed CVD Growth
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Title
- Formation Mechanism, Growth Kinetics, and Stability Limits of Graphene Adlayers in Metal-Catalyzed CVD Growth
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Author(s)
- Zhu-Jun Wang; Feng Ding; Gyula Eres; Markus Antonietti; Robert Schloegl; Marc Georg Willinger
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Subject
- adlayer nucleation, ; catalytic chemical vapor deposition, ; graphene growth, ; in-situ, ; self-limited growth
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Publication Date
- 2018-07
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Journal
- ADVANCED MATERIALS INTERFACES, v.5, no.14, pp.1800255
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Publisher
- WILEY
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Abstract
- A new mechanism by which catalytic chemical vapor deposition of graphene spontaneously terminates at a single layer on Pt foils is discussed. This self-limited growth regime is identified by direct imaging of adlayer graphene evolution using in-situ environmental scanning electron microscopy. Two fundamentally different mechanisms for adlayer nucleation are revealed. Besides primary nucleation, which is the standard nucleation that occurs only at the onset of growth, a secondary nucleation of adlayers is observed near full coverage of the substrate. Direct observation reveals layer-dependent growth kinetics and the establishment of a dynamic equilibrium between the forward reaction of carbon incorporation and the reverse reaction of graphene etching. Increasing coverage of the active catalyst gives rise to a spontaneous reversal of adlayer evolution from growth to etching. The growth reversal has important practical benefits. It creates a self-limited growth regime in which all adlayer graphene is removed and it enables large-scale production of 100% single-layer graphene © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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URI
- https://pr.ibs.re.kr/handle/8788114/5544
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DOI
- 10.1002/admi.201800255
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ISSN
- 2196-7350
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Appears in Collections:
- Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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