871208.fig.005a
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871208.fig.005b
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871208.fig.005c
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Figure 5: Variation in the diameter of the carbon nanocapsules and the encapsulated clusters and the thickness of graphitic layers in Co-encapsulated carbon nanocapsules with heating temperature. The encapsulated clusters are hexagonal-closed-packed Co (the open triangles in the middle frame) at 873–1173 K and orthorhombic Co2C (the filled triangles in the middle frame) at 1273 K.