Kinetics of picoliter binary droplet evaporation on a substrate at reduced pressure

Abstract

The effects of different factors on the time of evaporation of a single picoliter droplet of a water-alcohol solution on a metal substrate with a high thermal conductivity have been studied in the free molecular regime. It has been experimentally shown that the evaporation of such droplets occurs in the pinning mode. The evaporation times have been measured for droplets of water-alcohol solutions of different concentrations on the substrate at a reduced pressure. The calculations performed in terms of a one-dimensional mathematical model have shown that the rates of evaporation of pico- and femtoliter droplets of water-alcohol solutions nonlinearly depend on alcohol concentration, initial droplet height, and substrate temperature.

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Correspondence to S. P. Fisenko.

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Original Russian Text © V.I. Saverchenko, S.P. Fisenko, Yu.A. Khodyko, 2015, published in Kolloidnyi Zhurnal, 2015, Vol. 77, No. 1, pp. 79–84.

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Saverchenko, V.I., Fisenko, S.P. & Khodyko, Y.A. Kinetics of picoliter binary droplet evaporation on a substrate at reduced pressure. Colloid J 77, 71–76 (2015). https://doi.org/10.1134/S1061933X15010147

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Keywords

  • Colloid Journal
  • Droplet Evaporation
  • Free Molecular Regime
  • Average Number Density
  • Stefan Condition