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Published on: July 26, 2016
Effects of gas molecules on nanofluidic behaviors
1Department of Structural Engineering, University of California at San Diego, La Jolla, California 92093-0085, USA.
Abstract:
Most previous studies on nanofluidic motions were focused on liquid-solid interactions, with the important role of gas phase being ignored. Through a molecular dynamics simulation, we show that the gas-liquid interaction can be an indispensable factor in nanoenvironments. Gas molecules in relatively large nanochannels can be dissolved in the liquid during pressure-induced infiltration, leading to the phenomenon of "nonoutflow". By contrast, gas molecules tend to form clusters in relatively small nanochannels, which triggers liquid defiltration at a reduced pressure. The results qualitatively fit with the observations in a high-pressure-resting experiment on nanoporous silica gels.
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