Microfluidics and Nanofluidics

, Volume 18, Issue 5–6, pp 1107–1114 | Cite as

Focused surface acoustic wave induced jet formation on superhydrophobic surfaces

  • Marten Darmawan
  • Doyoung ByunEmail author
Research Paper


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.


Focused 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

Supplementary material 1 (MP4 1144 kb)


  1. Brunet P, Baudoin M, Matar OB, Zoueshtiagh F (2010) Droplet displacements and oscillations induced by ultrasonic surface acoustic waves: a quantitative study. Phys Rev E 81:036315CrossRefGoogle Scholar
  2. 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
  3. De Gennes P-G (1985) Wetting: statics and dynamics. Rev Mod Phys 57:827CrossRefGoogle Scholar
  4. Dentry MB, Yeo LY, Friend JR (2014) Frequency effects on the scale and behavior of acoustic streaming. Phys Rev E 89:013203CrossRefGoogle Scholar
  5. Eckart C (1948) Vortices and streams caused by sound waves. Phys Rev 73:68CrossRefzbMATHMathSciNetGoogle Scholar
  6. Faraday M (1831) On a peculiar class of acoustical figures; and on certain forms assumed by groups of particles upon vibrating elastic surfaces. Philos Trans R Soc Lond 121:299–340CrossRefGoogle Scholar
  7. Friend J, Yeo LY (2011) Microscale acoustofluidics: Microfluidics driven via acoustics and ultrasonics. Rev Mod Phys 83:647CrossRefGoogle Scholar
  8. Luong T-D, Phan V-N, Nguyen N-T (2011) High-throughput micromixers based on acoustic streaming induced by surface acoustic wave. Microfluid Nanofluidics 10:619–625CrossRefGoogle Scholar
  9. Manor O, Dentry M, Friend JR, Yeo LY (2011) Substrate dependent drop deformation and wetting under high frequency vibration. Soft Matter 7:7976–7979CrossRefGoogle Scholar
  10. Qi A, Yeo LY, Friend JR (2008) Interfacial destabilization and atomization driven by surface acoustic waves. Phys Fluids (1994-present) 20:074103CrossRefGoogle Scholar
  11. Quintero R, Simonetti F (2013) Rayleigh wave scattering from sessile droplets. Phys Rev E 88:043011CrossRefGoogle Scholar
  12. Rayleigh JWSB (1896) The theory of sound, vol 2. Macmillan, NewyorkzbMATHGoogle Scholar
  13. Schmid L, Wixforth A, Weitz DA, Franke T (2012) Novel surface acoustic wave (SAW)-driven closed PDMS flow chamber. Microfluid Nanofluid 12:229–235CrossRefGoogle Scholar
  14. Schröder CT, Scott WR Jr (2001) On the complex conjugate roots of the Rayleigh equation: the leaky surface wave. J Acoust Soc Am 110:2867–2877CrossRefGoogle Scholar
  15. Shi J, Huang H, Stratton Z, Huang Y, Huang TJ (2009) Continuous particle separation in a microfluidic channel via standing surface acoustic waves (SSAW). Lab Chip 9:3354–3359CrossRefGoogle Scholar
  16. 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
  17. 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
  18. Tan MK, Friend JR, Yeo LY (2009) Interfacial jetting phenomena induced by focused surface vibrations. Phys Rev Lett 103:024501CrossRefGoogle Scholar
  19. Wu T-T, Tang H-T, Chen Y-Y, Liu P-L (2005) Analysis and design of focused interdigital transducers. IEEE Trans Ultrason Ferroelectr Freq Control 52:1384–1392CrossRefGoogle Scholar
  20. Xu W, Choi C-H (2012) From sticky to slippery droplets: dynamics of contact line depinning on superhydrophobic surfaces. Phys Rev Lett 109:024504CrossRefGoogle Scholar
  21. Xuan X, Zhu J, Church C (2010) Particle focusing in microfluidic devices. Microfluid Nanofluidics 9:1–16CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringSungkyunkwan UniversitySuwonRepublic of Korea

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