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Study on the transport of water molecules under the geometry confinement of aquaporin-like nanopores

Authors
Journal
Applied Thermal Engineering
1359-4311
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/j.applthermaleng.2014.02.049
Keywords
  • Fast Water Transport
  • Flexible Hourglass-Shaped Pore
  • Aquaporin Water Channel
Disciplines
  • Computer Science

Abstract

Abstract Aquaporin water channels enable fast water transport while maintaining the resistance against protons and ions. We mimic this aquaporin with a rigid or flexible hourglass-shaped nanopore in our molecular dynamics simulation. The simulation was non-equilibrium one with applied uniform external forces with the purpose of mimicking osmosis-driven flows. The simplified computational model successfully captures the important physics of real aquaporin to confirm the validity of our flexible hourglass-shaped pore model. We also found that the hourglass-shaped pore has the ability to occupy more water molecules and conduct faster water transport than the straight pores with the pore diameter. We suggest that deforming straight nanopores into hourglass-shape may enhance the ability of water transport in thin membranes.

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