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Proceedings 2017, 1(4), 392; doi:10.3390/proceedings1040392

Piezoelectric Actuators for In-Liquid Particle Manipulation in Microfluidic Applications

Department of Information Engineering, University of Brescia, 25121 Brescia, Italy
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
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Published: 8 August 2017
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Abstract

The possibility to generate acoustic modes based on FPWs (Flexural Plate Waves) in a generic non-piezoelectric substrate for microfludic applications by means of piezoelectric actuators has been explored and described in this paper. The FPW acoustic modes are generated by means of actuators made of Lead Zirconate Titanate (PZT) layers with InterDigital Transducers (IDTs) screen-printed on alumina (Al2O3) substrate. The experimental results show that, by exciting the resonances of the actuators, circular vortex rotations are obtained in a fluid drop placed on the substrate between the IDTs. Micrometric particles dispersed in the drop allow to demonstrate that standing waves can be generated in the liquid obtaining particle accumulation along circular lines. These results suggest the possibility to employ the proposed actuators for fluid mixing and controlled positioning of dispersed particles.
Keywords: acoustic wave; in-liquid particle manipulation; FPWs flexural plate waves; piezoelectric actuators acoustic wave; in-liquid particle manipulation; FPWs flexural plate waves; piezoelectric actuators
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Demori, M.; Baù, M.; Dalola, S.; Ferrari, M.; Ferrari, V. Piezoelectric Actuators for In-Liquid Particle Manipulation in Microfluidic Applications. Proceedings 2017, 1, 392.

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