Effects of gas molecules on nanofluidic behaviors

Yu QIAO, Guoxin CAO, Xi CHEN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

123 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2355-2359
Number of pages5
JournalJournal of the American Chemical Society
Volume129
Issue number8
Early online date6 Feb 2007
DOIs
Publication statusPublished - Feb 2007
Externally publishedYes

Bibliographical note

The numerical study was supported by the National Science Foundation under Grant No. CMS-0407743 and CMS-0643726. The discussion and the pressure induced infiltration experiment were supported by the Army Research Office under Grant No. W911NF-05-1-0288.

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