Disjoining Pressure of Water in Nanochannels

An Zou, Sajag Poudel, Manish Gupta, Shalabh C. Maroo

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The disjoining pressure of water was estimated from wicking experiments in 1D silicon dioxide nanochannels of heights of 59, 87, 124, and 1015 nm. The disjoining pressure was found to be as high as ∼1.5 MPa while exponentially decreasing with increasing channel height. Such a relation resulting from the curve fitting of experimentally derived data was implemented and validated in computational fluid dynamics. The implementation was then used to simulate bubble nucleation in a water-filled 59 nm nanochannel to determine the nucleation temperature. Simultaneously, experiments were conducted by nucleating a bubble in a similar 58 nm nanochannel by laser heating. The measured nucleation temperature was found to be in excellent agreement with the simulation, thus independently validating the disjoining pressure relation developed in this work. The methodology implemented here integrates experimental nanoscale physics into continuum simulations thus enabling numerical study of various phenomena where disjoining pressure plays an important role.

Original languageEnglish (US)
Pages (from-to)7769-7774
Number of pages6
JournalNano Letters
Issue number18
StatePublished - Sep 22 2021
Externally publishedYes


  • capillary pressure
  • disjoining pressure
  • nanochannel
  • nucleation
  • water
  • wicking

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


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