Nanoscale fluid transport: Size and rate effects

Xi CHEN, Guoxin CAO, Aijie HAN, Venkata K. PUNYAMURTULA, Ling LIU, Patricia J. CULLIGAN, Taewan KIM, Yu QIAO*

*Corresponding author for this work

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

253 Citations (Scopus)


The transport behavior of water molecules inside a model carbon nanotube is investigated by using nonequilibrium molecular dynamcis (NMED) simulations. The shearing stress between the nanotube wall and the water molecules is identified as a key factor in determining the nanofluidic properties. Due to the effect of nanoscale confinement, the effective shearing stress is not only size sensitive but also strongly dependent on the fluid flow rate. Consequently, the nominal viscosity of the confined water decreases rapidly as the tube radius is reduced or when a faster flow rate is maintained. An infiltration experiment on a nanoporous carbon is performed to qualitatively validate these findings. © 2008 American Chemical Society.
Original languageEnglish
Pages (from-to)2988-2992
Number of pages5
JournalNano Letters
Issue number9
Early online date23 Aug 2008
Publication statusPublished - 10 Sept 2008
Externally publishedYes

Bibliographical note

Acknowledgment: The work was supported by ARO under Grant W911NF-05-1-0288, by NSF and Sandia National Laboratory under Grant CMMI-0623973, and by NSF under Grant CMMI-0643726.


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