Van der Waals energy surface of carbon nanotubes sheet

Details Van der Waals energy surface of carbon nanotubes sheet Van der Waals energy surface of carbon nanotubes sheet

2011-05-12

arxiv.org/abs/1105.2538v1

Solid State Communications (152), 225 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

The van der Walls interaction between a carbon nanotubes sheet (CNTS) and a rare gas atom, is studied using both atomistic and continuum approaches. We present analytical expressions for the van der Waals energy of continuous nanotubes interacting with a rare gas atom. It is found that the continuum approach dose not properly treat the effect of atomistic configurations on the energy surfaces. The energy barriers are small as compared to the thermal energy, which implies the free motion above the CNTS in heights about one nanometer. In contrast to the energy surface of a graphene sheet, the honeycomb lattice structure in the energy surface of a CNTS is imperceivable. Defects alter the energy surface which therefore influence the gas absorbtion mechanism. (Corresponding author:neekamal@srttu.edu)

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