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Spherical carbon nanobeads (solid and hollow) of two sizes of around 500–850 nm (large) and 250 nm (small) were synthesized by pyrolysing camphor vapour at 1000 °C in an argon atmosphere, using ferrocene, as catalyst, for the first time. The EEL spectrum suggests the carbon beads to be non-graphitic and these are covered by a graphitic shell of 80–100 nm, revealed by transmission electron microscopy...
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