期刊
NANOSCALE
卷 10, 期 42, 页码 19957-19963出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr06204h
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资金
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA0003525]
- DOE National Energy Technology Laboratory project
- Center for Frontiers in Subsurface Energy Security, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001114]
A fluid flow in a nanochannel highly depends on the wettability of the channel surface to the fluid. The permeability of the nanochannel is usually very low, largely due to the adhesion of fluid at the solid interfaces. Using molecular dynamics (MD) simulations, we demonstrate that the flow of water in a nanochannel with rough hydrophilic surfaces can be significantly enhanced by the presence of a thin layer of supercritical carbon dioxide (scCO(2)) at the water-solid interfaces. The thin scCO(2) layer acts like an atomistic lubricant that transforms a hydrophilic interface into a super-hydrophobic one and triggers a transition from a stick- to- a slip boundary condition for a nanoscale flow. This work provides an atomistic insight into multicomponent interactions in nanochannels and illustrates that such interactions can be manipulated, if needed, to increase the throughput and energy efficiency of nanofluidic systems.
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