Abstract
We investigated the van der Waals (vdW) interaction effect between the carbon nanotube (CNT) and the substrate for the fullerene-shuttle device based on nanopeapod using the atomistic simulations. For the fullerene-shuttle memory devices, the vdW interactions between the CNT and the substrate made the compressive deformations of the CNT; then, affected the speed of their operations. As the vdW interaction increased, the CNT was compressed, the positions of the C 60 fullerenes were confined between both the compressed CNT regions; and then, the peapod regions were exactly distinguished from the nanotube regions. The compressions of the peapod regions were smaller than those in the nanotube region because of the vdW interactions between the C 60 fullerenes and the CNT. The C 60 migrations found in our molecular dynamics simulations were the rolling mode in the CNT. As the vdW interactions increased, although the C 60 fullerene was accelerated in the short region, the C 60 fullerene was blocked by the compressed CNT regions; then, the C 60 fullerene was moved back against the direction of the externally applied force.
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