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Thermally driven nanotube nanomotors provide linear mass transportationcontrolled by a temperature gradient. However, the underlying mechanism isstill unclear where the mass transportation velocity in experiment is muchlower than that resulting from simulations. Considering that defects are commonin fabricated nanotubes, we use molecular dynamics simulations to show that themass transportation would be considerably impeded by the potential barriers orwells induced by the defects, which provides a possible picture to understandthe relative low value at microscopic level. The optimal structure and thefactors which would affect the performance are discussed. The result indicatesconsidering defects is helpful in designing nanotube nanomotor and other newnanomotor-based devices.

Mass transportation of thermally driven nanotube nanomotors with defects