Stability of C-60-peapods under hydrostatic pressure

作者：Sohi A N; Naghdabadi R^*

来源：Acta Materialia, 2007, 55(16): 5483-5488.

DOI：10.1016/j.actamat.2007.06.007

• carbon nanopeapods
• continuum mechanics
• nanostructure
• mechanical properties
• buckling

The stability of single-walled carbon nanopeapods under hydrostatic pressure is investigated using a continuum-based elastic shell model. The model incorporates nonbonded van der Waals interactions between the nested fullerenes and the host carbon nanotube. By deriving an explicit equation, it is shown that the critical hydrostatic pressure for the onset of structural instability of a completely packed C-60@(10,10) nanopeapod is similar to 1.11 GPa, while for the case of the pristine host (10,10) nanotube it is similar to 1.84 GPa. Thus, it is concluded that the fullerene encapsulation weakens the host nanotube under hydrostatic pressure. In addition, it is quantitatively shown that any decrease in packing density of fullerenes lessens the weakening effect on the total stability of the nanopeapod.

• 出版日期2007-9