Abstract

A new ordered fullerene phase encapsulated by large-diameter CNTs is systematicallyinvestigated by combining a growth technique by chemical vapour deposition, high-resolutiontransmission electron microscopy and molecular-dynamics simulations. In contrast to fullerenesin smaller (1–2 nm) diameter CNTs, where fullerenes are packed in linear or helical chains,fullerenes form a nanoscale cylinder in double-walled CNTs with diameters of∼4 nm.The fullerenes were shown to form a nanocylinder with a side wall that resembled the (111) plane ofsolid C60. This ordered phase is different from peapods or fullerene solids known so far, and a resultof the interaction between the CNT wall and fullerenes. This finding will open up a newfield of fullerene science.

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