Focused surface acoustic wave induced jet formation on superhydrophobic surfaces
- 713 Downloads
We investigated the unusual droplet jetting formation as a response to the high intensity of a focused acoustic wave on superhydrophobic surface. When focused surface acoustic waves come into contact with a free surface droplet, an elongated pinched liquid column is formed due to the translation of the acoustic radiation force into the inertial body force on the bulk of the droplet. This phenomenon, however, was found to differ as the surface wettability changed. We examined this phenomenon by conducting an experimental observation of the droplet deformation, and a further analysis was carried out using a numerical study, providing a quasi-quantitative analysis of the acoustic radiation pressure distribution.
KeywordsFocused surface acoustic wave Droplet jetting Surface wettability Acoustic radiation force
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science, and Technology (2011-0016461), and by the Industrial Core Technology Development Project through the Ministry of Knowledge and Commerce (10035644-2012-03).
Supplementary material 1 (MP4 1144 kb)
- Darmawan M, Jeon K, Ju JM, Yamagata Y, Byun D (2014) Deposition of poly (3, 4-ethylenedioxythiophene)–poly (styrenesulfonate)(PEDOT-PSS) particles using standing surface acoustic waves and electrostatic deposition method for the rapid fabrication of transparent conductive film. Sens Actuators A 205:177–185CrossRefGoogle Scholar
- Shilton RJ, Travagliati M, Beltram F, Cecchini M (2014) Nanoliter‐droplet acoustic streaming via ultra high frequency surface acoustic waves. Adv Mater 26(29):4941–4946Google Scholar
- Shiokawa S, Matsui Y, Ueda T (1989) Liquid streaming and droplet formation caused by leaky Rayleigh waves. In: Ultrasonics Symposium, 1989. Proceedings., IEEE 1989, pp 643–646Google Scholar