Different mechanisms of graphene wall nucleation on Fe and Ni particles - École polytechnique Access content directly
Conference Papers Advances in Imaging and Electron Physics Year : 2013

Different mechanisms of graphene wall nucleation on Fe and Ni particles

Abstract

We compare, by in situ annealing of carbon nanofibres (CNFs) in the TEM, the catalytic activities of Ni and Fe for the nucleation of graphene layers. Graphene planes that are at an angle with the metal are dissolved in the case of Ni, while new graphene layers are generated parallel to the surface. In the case of Fe, we see no evolution of the particle in the same conditions, unless we start from an amorphized CNF. In that case, the amorphous carbon is easily dissolved into the Fe. These dissolved carbon atoms get out of the particle in the form of a new nanotube, where nucleation takes place - partly at least - perpendicular to the Fe surface.
Fichier principal
Vignette du fichier
CISCEMSaarbrucken_Maurice.pdf (248.14 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-00753768 , version 1 (19-11-2012)

Identifiers

Cite

Jean-Luc Maurice, Zhanbing He, Costel Sorin Cojocaru. Different mechanisms of graphene wall nucleation on Fe and Ni particles. Conference on in-situ and correlative electron microscopy (CISCEM), Nov 2012, Saarbrücken, Germany. pp.142, ⟨10.1016/B978-0-12-407700-3.00002-8⟩. ⟨hal-00753768⟩
303 View
344 Download

Altmetric

Share

Gmail Facebook X LinkedIn More