Characterization of fullerene nanotubes prepared by the liquid-liquid interfacial precipitation method

C70 nanotubes were prepared by using pyridine and isopropyl alcohol and heated in air at 250 °C in order to eliminate the contained solvents 'heat treated C70'. The C70 nanotubes were also successfully prepared by use of pyridine and isobutyl alcohol. The C70 nanotubes heated at 1100 °C in vacuum became amorphous carbon, but retained the tubular structure. The structural characteristics of these C70 nanotubes are observed through their high-resolution transmission electron microscopy.