Laser diagnostics of the Bubston phase in the bulk of aqueous salt solutions

Abstract

Stable gas nanobubbles in the bulk of NaCl aqueous solutions and clusters of these nanobubbles have been investigated at different ion concentrations by four independent laser techniques (phase microscopy, dynamic light scattering, optical breakdown, and measurement of angular dependences of the light scattering matrix). The results obtained by these radically different techniques are in good agreement. It is found that the nanobubble size is practically constant and amounts to approximately 100nm in the range of ion concentrations 10−6<C <1M. It is shown that a necessary condition for nanobubble nucleation is the saturation of solution with dissolved air. It is revealed that nanobubble clusters form a thermodynamically nonequilibrium phase with a lifetime of several months.

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Bunkin, N.F., Shkirin, A.V., Babenko, V.A. et al. Laser diagnostics of the Bubston phase in the bulk of aqueous salt solutions. Phys. Wave Phen. 23, 161–175 (2015). https://doi.org/10.3103/S1541308X15030012

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Keywords

  • Refractive Index
  • Dynamic Light Scattering
  • Wave Phenomenon
  • Optical Breakdown
  • Aqueous Salt Solution