Mass transportation of thermally driven nanotube nanomotors with defects

TL;DR

This study uses molecular dynamics simulations to explore how defects in nanotubes impede thermally driven nanomotor mass transportation, providing insights for improved nanomotor design.

Contribution

It reveals the impact of defects on nanomotor efficiency and discusses optimal structures, advancing understanding of defect effects in thermally driven nanotube nanomotors.

Findings

Defects create potential barriers that impede mass transport.

Optimal nanotube structures enhance nanomotor performance.

Defect consideration aids in designing more efficient nanomotors.

Abstract

Thermally driven nanotube nanomotors provide linear mass transportation controlled by a temperature gradient. However, the underlying mechanism is still unclear where the mass transportation velocity in experiment is much lower than that resulting from simulations. Considering that defects are common in fabricated nanotubes, we use molecular dynamics simulations to show that the mass transportation would be considerably impeded by the potential barriers or wells induced by the defects, which provides a possible picture to understand the relative low value at microscopic level. The optimal structure and the factors which would affect the performance are discussed. The result indicates considering defects is helpful in designing nanotube nanomotor and other new nanomotor-based devices.