sentences:  There are two structures of CNBs that are ferromagnetic in their ground state, and two that are nonmagnetic.The attached C60 molecule on the surface of the CNTs gives more space between the nanotubes and adhesion between the single walled CNTS can be weakened to prevent the formation of tight bundles of CNTs.Carbon nanobuds can be used as molecular support to prevent slipping of the matrix in composite materials and to increase the mechanical strength of them.