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Communication Dans Un Congrès Année : 2012

Tunable and Label-Free Bacteria Alignment Using Standing Surface Acoustic Waves

Sylvain Toru
  • Fonction : Auteur
Marie Frénéa-Robin
Naoufel Haddour
François Buret

Résumé

This paper describes a new technique for focusing bacteria in a microfluidic channel and subsequently controlling their trajectory. Bacteria alignment is obtained using standing surface acoustic waves (SSAW) generated by two interdigitated transducer electrodes (IDTs) patterned on a piezoelectric wafer. The bacteria are focused in the standing wave pressure nodes, separated by half a wavelength, the electrode geometry and applied voltage frequency being chosen accordingly. Interestingly, the position of a pressure node can be modulated by introducing a phase shift between the electrical signals applied to both IDTs. The bacteria, trapped in this node, follow it and can therefore be deflected. This technique works with label-free bacteria in their culture medium and induces low power consumption, which is very interesting for portable devices.
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Dates et versions

hal-00734026 , version 1 (20-09-2012)

Identifiants

Citer

Sylvain Toru, Marie Frénéa-Robin, Naoufel Haddour, François Buret. Tunable and Label-Free Bacteria Alignment Using Standing Surface Acoustic Waves. 34th IEEE EMBC, Aug 2012, San Diego, United States. pp.FrC07.3, ⟨10.1109/EMBC.2012.6347115⟩. ⟨hal-00734026⟩
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