Low power sessile droplets actuation via modulated surface acoustic waves

Michael Baudoin, Philippe Brunet, Olivier Bou Matar, Etienne Herth

doi:10.1063/1.3701725

Low power sessile droplets actuation via modulated surface acoustic waves

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Michael Baudoin

International Associated Laboratory LEMAC, IEMN, UMR CNRS 8520, Université des Sciences et Technologies de Lille and EC Lille 1 , 59652 Villeneuve dAscq Cédex, France
Philippe Brunet

Laboratoire MSC, UMR 75057, 10 rue Alice Domon et Léonie Duquet 2 , 75205 Paris, France
Olivier Bou Matar

International Associated Laboratory LEMAC, IEMN, UMR CNRS 8520, Université des Sciences et Technologies de Lille and EC Lille 1 , 59652 Villeneuve dAscq Cédex, France
Etienne Herth

International Associated Laboratory LEMAC, IEMN, UMR CNRS 8520, Université des Sciences et Technologies de Lille and EC Lille 1 , 59652 Villeneuve dAscq Cédex, France

書誌事項

公開日: 2012-04-09

DOI

10.1063/1.3701725

公開者: AIP Publishing

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説明

<jats:p>Low power actuation of sessile droplets is of primary interest for portable or hybrid lab-on-a-chip and harmless manipulation of biofluids. In this paper, we show that the acoustic power required to move or deform droplets via surface acoustic waves can be substantially reduced through the forcing of the drops inertio-capillary modes of vibrations. Indeed, harmonic, superharmonic, and subharmonic (parametric) excitation of these modes are observed when the high frequency acoustic signal (19.5 MHz) is modulated around Rayleigh-Lamb inertio-capillary frequencies. This resonant behavior results in larger oscillations and quicker motion of the drops than in the non-modulated case.</jats:p>