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High yields of graphitic conical nanofibres (5-70 nm OD; <5μm long) are produced by pyrolysing palladium precursors under Ar at 850-1000 o C. The fibres exhibit diamond-shaped Pd particles at their tips, which are responsible for the formation of stacked graphene cones (open, lampshade-type, or closed). The cones observed with apex angles of ca. 30 o , 50 o and 70 o...
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