| Issue |
EPL
Volume 96, Number 4, November 2011
|
|
|---|---|---|
| Article Number | 46003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/96/46003 | |
| Published online | 09 November 2011 | |
On the mechanisms of precipitation of graphene on nickel thin films
1
LPICM CNRS École polytechnique - Palaiseau 91120, France, EU
2
Department of Energy Science, Sungkyunkwan University - Suwon 440-746, Korea
a
jean-luc.maurice@polytechnique.edu
b
didier53@skku.edu
Received:
17
May
2011
Accepted:
2
October
2011
Growth on transition metal substrates is becoming a method of choice to prepare large-area graphene foils. In the case of nickel, where carbon has a significant solubility, such a growth process includes at least two elementary steps: 1) carbon dissolution into the metal, and 2) graphene precipitation at the surface. Here, we dissolve calibrated amounts of carbon in nickel films, using carbon ion implantation, and annealing at 725 ○C or 900 ○C. We then use transmission electron microscopy to analyse the precipitation process in detail: the latter appears to imply carbon diffusion over large distances and at least two distinct microscopic mechanisms.
PACS: 68.65.Pq – Graphene films / 81.05.ue – Graphene / 81.16.Hc – Catalytic methods
© EPLA, 2011
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