Abstract
We perform ab initio density functional calculations to study the flow of water, methanol, and dimethyl ether through nanotubes of carbon and boron nitride with different diameters and chiralities. The liquids we choose are important solvents, with water and methanol being polar and dimethyl ether being nonpolar. In terms of activation barriers for liquid transport, we find the molecular-level drag to decrease with decreasing nanotube diameter but to be rather independent of the chiral index. We also find molecules with higher polarity to generally experience higher drag during flow. Counterintuitively, we find the drag for water in boron nitride nanotubes not to exceed that in carbon nanotubes due to frustration in competing long-range Coulomb interactions.
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