C-70 whiskers with submicrometer diameters (C-70 nanowhiskers, or C(70)NWs) have been successfully fabricated by forming liquid/liquid interfaces in systems that involve a toluene solution of C-70 and isopropyl alcohol. Transmission electron microscopy observations show that the C(70)NWs have a <110> growth axis and that the intercluster distance of C-70 molecules in the C(70)NWs are shortened by similar to3%, compared with that of face-centered cubic C-70 crystals in the 110 close-packed growth direction, which indicates the formation of strong chemical bonds between the C-70 molecules. It is suggested that the C-70 molecules are polymerized, with their short axis parallel to the growth axis of the C(70)NWs, from observation via high-resolution transmission electron microscopy.