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  Direct Observation of Graphene Growth and Associated Copper Substrate Dynamics by in Situ Scanning Electron Microscopy

Wang, Z.-J., Weinberg, G., Zhang, Q., Lunkenbein, T., Klein-Hoffmann, A., Kurnatowska, M., et al. (2015). Direct Observation of Graphene Growth and Associated Copper Substrate Dynamics by in Situ Scanning Electron Microscopy. ACS Nano, 9(2), 1506-1519. doi:10.1021/nn5059826.

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In-situ-ESEM-Willinger-revision-II.pdf (Any fulltext), 3MB
 
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 Creators:
Wang, Zhu-Jun1, Author              
Weinberg, Gisela1, Author              
Zhang, Qiang1, Author              
Lunkenbein, Thomas1, Author              
Klein-Hoffmann, Achim1, Author              
Kurnatowska, Michalina2, Author
Plodinec, Milivoj3, Author
Li, Qing4, Author
Chi, Lifeng4, Author
Schlögl, Robert1, Author              
Willinger, Marc Georg1, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 52-422 Wroclaw, Poland, ou_persistent22              
3Laboratory for Molecular Physics, Ruđer Bošković Institute, 10000 Zagreb, Croatia, ou_persistent22              
4Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, Jiangsu, China, ou_persistent22              

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Free keywords: in situ; graphene growth; electron microscopy; catalysis
 Abstract: This work highlights the importance of in situ experiments for an improved understanding of graphene growth on copper via metal-catalyzed chemical vapor deposition (CVD). Graphene growth inside the chamber of a modified environmental scanning electron microscope under relevant low-pressure CVD conditions allows visualizing structural dynamics of the active catalyst simultaneously with graphene nucleation and growth in an unparalleled way. It enables the observation of a complete CVD process from substrate annealing through graphene nucleation and growth and, finally, substrate cooling in real time and nanometer-scale resolution without the need of sample transfer. A strong dependence of surface dynamics such as sublimation and surface premelting on grain orientation is demonstrated, and the influence of substrate dynamics on graphene nucleation and growth is presented. Insights on the growth mechanism are provided by a simultaneous observation of the growth front propagation and nucleation rate. Furthermore, the role of trace amounts of oxygen during growth is discussed and related to graphene-induced surface reconstructions during cooling. Above all, this work demonstrates the potential of the method for in situ studies of surface dynamics on active metal catalysts.

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Language(s): eng - English
 Dates: 2014-10-202015-01-132015-01-132015-02-24
 Publication Status: Published in print
 Pages: 14
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/nn5059826
 Degree: -

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Title: ACS Nano
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 9 (2) Sequence Number: - Start / End Page: 1506 - 1519 Identifier: Other: 1936-0851
CoNE: https://pure.mpg.de/cone/journals/resource/1936-0851