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  Formation mechanism, growth kinetics, and stability limits of graphene adlayers in metal-catalyzed CVD growth

Wang, Z., Ding, F., Eres, G., Antonietti, M., Schloegl, R., & Willinger, M. G. (2018). Formation mechanism, growth kinetics, and stability limits of graphene adlayers in metal-catalyzed CVD growth. Advanced Materials Interfaces, 5(14): 1800255. doi:10.1002/admi.201800255.

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 Creators:
Wang, Zhu‐Jun, Author
Ding, Feng, Author
Eres, Gyula, Author
Antonietti, Markus1, Author              
Schloegl, Robert, Author
Willinger, Marc Georg2, Author              
Affiliations:
1Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              
2Marc Willinger, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2364728              

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Free keywords: adlayer nucleation; catalytic chemical vapor deposition; graphene growth; in‐situ; self‐limited growth
 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-cale production of 100% single-layer graphene.

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Language(s): eng - English
 Dates: 2018-05-142018
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/admi.201800255
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Title: Advanced Materials Interfaces
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 5 (14) Sequence Number: 1800255 Start / End Page: - Identifier: ISSN: 2196-7350