Volume of a nanoscale water bridge

Lucel Sirghi, Robert Szoszkiewicz, Elisa Riedo

Research output: Contribution to journalArticle

Abstract

Water bridges formed through capillary condensation at nanoscale contacts first stretch and then break during contact rupture. Atomic force microscopy (AFM) pull-off experiments performed in air with hydrophilic tips and samples show that stretched nanoscopic water bridges are in mechanical equilibrium with the external pull-off force acting at the contact but not in thermodynamic equilibrium with the water vapor in air. The experimental findings are explained by a theoretical model that considers constant water volume and decrease of water meniscus curvature during meniscus stretching. The model predicts that the water bridge breakup distance will be roughly equal to the cubic root of the water bridge volume. A thermodynamic instability was noticed for large water bridges formed at the contact of a blunt AFM tip (curvature radius of 400 nm) with a flat sample. In this case, experiments showed rise and stabilization of the volume of the water at the contact in about 1 s. For sharp AFM tips (curvature radius below 50 nm), the experiments indicated that formation of stable water bridges occurs in a much shorter time (below 5 ms).

Original languageEnglish (US)
Pages (from-to)1093-1098
Number of pages6
JournalLangmuir
Volume22
Issue number3
DOIs
StatePublished - Jan 31 2006

Fingerprint

Water
water
Atomic force microscopy
menisci
curvature
atomic force microscopy
Thermodynamics
radii
Experiments
air
Steam
thermodynamic equilibrium
Air
Water vapor
Stretching
water vapor
Condensation
Stabilization
condensation
stabilization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Sirghi, L., Szoszkiewicz, R., & Riedo, E. (2006). Volume of a nanoscale water bridge. Langmuir, 22(3), 1093-1098. https://doi.org/10.1021/la052167h

Volume of a nanoscale water bridge. / Sirghi, Lucel; Szoszkiewicz, Robert; Riedo, Elisa.

In: Langmuir, Vol. 22, No. 3, 31.01.2006, p. 1093-1098.

Research output: Contribution to journalArticle

Sirghi, L, Szoszkiewicz, R & Riedo, E 2006, 'Volume of a nanoscale water bridge', Langmuir, vol. 22, no. 3, pp. 1093-1098. https://doi.org/10.1021/la052167h
Sirghi L, Szoszkiewicz R, Riedo E. Volume of a nanoscale water bridge. Langmuir. 2006 Jan 31;22(3):1093-1098. https://doi.org/10.1021/la052167h
Sirghi, Lucel ; Szoszkiewicz, Robert ; Riedo, Elisa. / Volume of a nanoscale water bridge. In: Langmuir. 2006 ; Vol. 22, No. 3. pp. 1093-1098.
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