sentences:  The stability of CNBs is dependent on the type of carbon-carbon bond that is dissociated in the cycloaddition reaction.It has been shown that carbon atoms of the SWCNT near the fullerene C60 molecule were pulled outward from the original wall surface due to the covalent bonding with cycloaddition reaction between the fullerene and nanotube; in addition, their bonding was transformed from sp2 to sp3 hybridization.An analysis using Raman scattering spectroscopy shows that the CNB sample had stronger chemical modification compared to CNTs.