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Proceedings 2017, 1(4), 545;

Acoustic Streaming Actuator and Multifrequency Resonator Sensor

Institute for Microelectronics and Microsensors, Johannes Kepler University, 4040 Linz, Austria
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
Author to whom correspondence should be addressed.
Published: 8 August 2017
(This article belongs to the Proceedings of Eurosensors 2017)
PDF [548 KB, uploaded 5 September 2017]


We introduce an analysis platform for the viscoelastic properties of biological fluids such as the synovia found in articular joints. Small sample volumes are available for diagnostic purpose. Our approach uses a thickness shear mode quartz crystal integrated in an electrodynamically actuated spring structure. This combines the sensitivity of the quartz resonator operating at several overtones in the MHz range with previously introduced low kHz frequency multimode resonators. The latter is not only advantageous for characterizing viscoelastic fluids but is also used as an acoustic streaming actuator. Particulate matter in the sample thus can be resuspended and their settling is observed by tracking the resonance frequencies and Q-factors of both the quartz and electrodynamic resonator sensors.
Keywords: acoustic streaming; viscosity; viscoelasticity; biofluids; synovia acoustic streaming; viscosity; viscoelasticity; biofluids; synovia
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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Reichel, E.K.; Voglhuber-Brunnmaier, T.; Jakoby, B. Acoustic Streaming Actuator and Multifrequency Resonator Sensor. Proceedings 2017, 1, 545.

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