Synthesis of oriented bundle fibers of fullerene C70 crystal nanotubes.

We synthesized oriented bundle fibers of C70 crystal nanotubes (NTs) by a liquid-liquid interfacial precipitation method. The bundle fibers were characterized by transmission electron microscopy and scanning electron microscopy. We deduced that in the formation process, bundle fibers of C70 nanowhiskers (NWs) precipitate initially, and then elution occurs in the interior region of each NW to form C70 NT bundle fibers.