High Frequency Acoustic Reflectometry for Solid/Liquid Interface Characterization: Application to Droplet Evaporation
Abstract
Evolution of the local concentration in a 1 μL 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.
- Publication:
-
Physics Procedia
- Pub Date:
- 2015
- DOI:
- 10.1016/j.phpro.2015.08.285
- Bibcode:
- 2015PhPro..70..459C
- Keywords:
-
- acoustic;
- concentration;
- droplet;
- evaporation