Coalesced by 20 h EB irradiation. As indicated by the arrows in Fig. 2~c!, no IR peaks corresponding to graphite ~868 and 1588 cm and/or CNTs ~874 and 1600 cm! were observed. We predicted that IR-active modes arising from the wasted region of the peanut-shaped dimers ~see Fig. 1! appear in the range 1300–1400 cm, as indicated by the vector illustration below the IR spectra. Because, as polymerization proceeds, the frequency of the vibrational modes arising from a given structure does not change significantly ~become broad! and their intensity becomes increased, the results of Fig. 3 suggested that the broad intensive IR band appearing around 1360 cm is assigned to the in-plane stretching motion arising from the wasted region of the peanut-shaped C60 polymer.