Double-walled carbon nanotubes (DWCN) undergo oscillatory behavior in the separation of their centers of mass after an external axial force is applied to separate and telescope them [1-4]. The external axial force can be thought as a mechanical impulse applied for short periods in the scale of picoseconds. In this work we performed molecular dynamics simulations at constant energy with several time-dependent functional forms of the initial impulse. Nanotubes were modeled as carbon sites with inter- and intra-molecular interactions. The studied system is the DWCN with chiral conformations (7,0) / (9,9). When the external axial force is applied, strong friction processes produced a pronounced increase in the average temperature of the system, which depends on the functional form of the applied impulse. After the external axial force is eliminated, the system shows a monotonically increase in its average temperature due to the friction forces during the oscillatory behavior. We will show the dependence in the increase of temperature as a function of the functional form of the applied impulse.

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