Single-walled carbon nanotubes (SWNTs) that incorporate arrays of fullerene molecules , the so-called fullerene peapods.

This class of carbon nanotubes is called Peapod, which has buckyball-like bullets embedded in the shell and inside the carbon nanotube. This class is the latest class of carbon nanotube CNT structures. In the empty CNT carbon nanotubes, we find an unusual temperature dependence of the Coulomb confinement oscillations, indicating the existence of a nanoelectromechanical coupling between the electronic states of the nanotube and the mechanical vibrations of the fullerenes .

There are two types of connections in the structure of diamond nanographites:

1-  Covalent bond, the connection between the carbon atoms of each honeycomb layer.

2-  It is a connection that connects the layers of the honeycomb.

Nano graphite, like honeycomb plates, has high strength due to having a strong covalent bond; On the contrary, this structure is much less strong than the honeycomb panels. The structure of diamond nanographite has a lattice structure. In nano-graphite, atomic bonds are established only on the surface, while in the diamond structure, these bonds fill the space in a three-dimensional network. In graphite, the carbon atom forms a covalent bond with three other carbon atoms, while in diamond, the carbon atom forms a covalent bond with four other carbon atoms.

The interplay between electrical and mechanical excitation in peapods, resulting in the emergence of a new class of nanoelectromechanical systems. Single-walled carbon nanotubes (SWNTs) that   incorporate arrays of fullerene molecules , the so-called fullerene peapods.

Conclusion :

It is a nanoelectromechanical coupling between the electronic and quantum states of carbon nanotubes (CNTs) and the mechanical vibrations of fullerenes.  Carbon peapods  are hybrid nanomaterials consisting of  spherical fullerenes enclosed in a CNT .  They are named because of their resemblance to the seeds of the pea plant.  Since the properties of carbon rocks are different from those of nanotubes and fullerenes, carbon peapods can be recognized as a new type of self-assembled graphene structure.