Graphene-graphite phase transition at the surface of a carbonized metal |
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Authors: | E V Rut’kov A V Kuz’michev N R Gall |
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Institution: | 1.Ioffe Physicotechnical Institute,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | A phase transition leading to the transformation of a graphene layer into a multilayer graphite film at the surface of a carbonized
metal has been experimentally studied on the atomic level under ultrahigh-vacuum conditions. It has been shown that this process
is governed by dynamic equilibrium between edge atoms of graphene islands and a chemisorbed carbon phase, two-dimensional
carbon “gas,” and is observed in the temperature range of 1000–1800 K. The features of the phase transition at the surfaces
Ni(111), Rh(111), and Re(10-10) are similar, although the specific kinetic characteristics of the process depend on the properties
of the substrate. It has been shown that change in the emissivity of the substrate after the formation of a multilayer graphite
film increases the rate of the phase transition and leads to a temperature hysteresis. |
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