Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 4, Pages 686-689Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.686
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The dynamic behavior of nickel atoms in graphitic carbon onions, observed by in situ atomic-resolution electron microscopy, shows the formation of stable new C-Ni phases. Nickel is observed to take substitutional in-plane positions in graphene layers, forming a planar graphitelike C-Ni lattice. Evidence is furthermore seen for the formation of a cubic C-NI phase, suggesting a possible phase transformation in C-Ni from a graphitelike to a diamondlike structure. The stability of the planar phases is shown by first-principles calculations which also indicate that the C-NI planes are metallic.
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