High Frequency Acoustic Reflectometry for Solid/Liquid Interface Characterization: Application to Droplet Evaporation

Julien Carlier (1) , Malika Toubal (1) , Sizhe Li (1) , Pierre Campistron (1) , Dorothée Debavelaere-Callens (1) , V. Thomy (2) , Vincent Senez (2) , Bertrand Nongaillard (1)

1 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520

Evolution of the local concentration in a 1 mL droplet of ethanol/water mixture during an evaporation process has been followed using high frequency acoustic reflectometry. This method has been developed for wetting characterization on micro/nanostructures and makes it possible to follow concentration evolution in a droplet deposited on a solid surface. This information gives the opportunity to predict wetting depending on surface tension linked to alcohol concentration evolution. The calibration of the method and concentration evolution in 50% and 30% ethanol droplets are presented. The evolution of a pure ethanol droplet composition is tracked so as to follow hydration process. (C) 2015 The Authors. Published by Elsevier B.V.

Mots clés: acoustic; concentration; droplet; evaporation

Domaines: Sciences de l'ingénieur [physics]; Physique [physics]

Julien Carlier, Malika Toubal, Sizhe Li, Pierre Campistron, Dorothée Debavelaere-Callens, et al.. High Frequency Acoustic Reflectometry for Solid/Liquid Interface Characterization: Application to Droplet Evaporation. 2015 ICU International Congress on Ultrasonics, May 2015, Metz, France. ⟨10.1016/j.phpro.2015.08.285⟩. ⟨hal-03280233⟩