Reference : Interdependency of Subsurface Carbon Distribution and Graphene− Catalyst Interaction
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/20098
Interdependency of Subsurface Carbon Distribution and Graphene− Catalyst Interaction
English
Weatherup, Robert S. [University of Cambridge > Department of Engineering]
Amara, Hakim [ONERA-CNRS, Chatillon > Laboratoire d'Etude des Microstructures]
Blume, Raoul [Helmholtz-Zentrum Berlin für Materialen und Energie]
Dlubak, Bruno [Unité Mixte de Physique CNRS/Thales > > > ; University of Paris-Sud]
Bayer, Bernhard C. [University of Cambridge > Department of Engineering]
Diarra, Mamadou mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit > ; Aix-Marseille Université CNRS, CINaM UMR]
Bahri, Mounib [ONERA-CNRS, Chatillon > Laboratoire d'étude des Microstructures]
Cabrero-Vilatela, Andrea [University of Cambridge > Department of Engineering]
Caneva, Sabina [University of Cambridge > Department of Engineering]
Kidambi, Piran R. [University of Cambridge > Department of Engineering]
Martin, Marie-Blandine [Unité Mixte de recherche CNRS / Thales > > > ; University of Paris-Sud]
Deranlot, Cyrile [Unité Mixte de Physique CNRS / Thales > > > ; University of Paris-Sud]
Seneor, Pierre [Unité mixte de Physique CNRS / Thales > > > ; University of Paris-Sud]
Schloegl, Robert [Fritz Haber Institute]
Ducastelle, François [ONERA-CNRS > Laboratoire d'étude des Microstructures]
Bichara, Christophe [Aix-Marseille Université CNRS, CINaM UMR 7325]
Hofmann, Stephan [University of Cambridge > Department of Engineering]
4-Sep-2014
Journal of the American Chemical Society
American Chemical Society
136
39
3698-13708
Yes (verified by ORBilu)
International
0002-7863
1520-5126
Washington
DC
[en] CHEMICAL-VAPOR-DEPOSITION; RAY PHOTOELECTRON-SPECTROSCOPY; HIGH-QUALITY GRAPHENE; IN-SITU OBSERVATIONS; NANOTUBE GROWTH; LAYER GRAPHENE; NICKEL; COPPER; MECHANISMS; DYNAMICS
[en] The dynamics of the graphene-catalyst interaction during chemical vapor deposition are investigated using in situ, time- and depth-resolved X-ray photoelectron
spectroscopy, and complementary grand canonical Monte Carlo simulations coupled to a tight-binding model. We thereby reveal the interdependency of the distribution of
carbon close to the catalyst surface and the strength of the graphene-catalyst interaction. The strong interaction of epitaxial graphene with Ni(111) causes a depletion of
dissolved carbon close to the catalyst surface, which prevents additional layer formation leading to a self-limiting graphene growth behavior for low exposure pressures
(10(-6)-10(-3) mbar). A further hydrocarbon pressure increase (to similar to 10(-1) mbar) leads to weakening of the graphene-Ni(111) interaction accompanied by additional
graphene layer formation, mediated by an increased concentration of near-surface dissolved carbon. We show that growth of more weakly adhered, rotated graphene on
Ni(111) is linked to an initially higher level of near-surface carbon compared to the case of epitaxial graphene growth. The key implications of these results for graphene
growth control and their relevance to carbon nanotube growth are highlighted in the context of existing literature.
http://hdl.handle.net/10993/20098
10.1021/ja505454v

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