Synthesis of Nickel-Encapsulated Carbon Nanocapsules and Cup-Stacked-Type Carbon Nanotubes via Nickel-Doped Fullerene Nanowhiskers

Figure 4

(a) Bright-field images of Ni-encapsulated carbon nanocapsules prepared by heating Ni-doped C₆₀ nanowhiskers (specimen A) at 973 K. (b) High-resolution image of Ni-encapsulated carbon nanocapsule. (c) High-resolution image of chain of Ni-encapsulated carbon nanocapsules.

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