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The Complexity of Surface Acoustic Wave Fields Used for Microfluidic Applications by Weser, R.; Winkler, A.; Weihnacht, M.; Menzel, S.; Schmidt, H. is a Engineering article available to read on EtoBox.

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Using surface acoustic waves (SAW) for the agitation and manipulation of fluids and immersed particles or cells in lab-on-a-chip systems has been state of the art for several years. Basic tasks comprise fluid mixing, atomization of liquids as well as sorting and separation (or trapping) of particles and cells, e.g. in so-called acoustic tweezers. Even though the fundamental principles governing SAW excitation and propagation on anisotropic, piezoelectric substrates are well-investigated, the complexity of wave field effects including SAW diffraction, refraction and interference cannot be comprehensively simulated at this point of time with sufficient accuracy. However, the design of microfluidic actuators relies on a profound knowledge of SAW propagation, including superposition of multiple SAWs, to achieve the predestined functionality of the devices. Here, we present extensive experimental results of high-resolution analysis of the lateral distribution of the complex displacement amplitude, i.e. the wave field, alongside with the electrical S-parameters of the generating transducers. These measurements were carried out and are compared in setups utilizing travelling SAW (tSAW) ex

Who reads The Complexity of Surface Acoustic Wave Fields Used for Microfluidic Applications?

Author

Weser, R.; Winkler, A.; Weihnacht, M.; Menzel, S.; Schmidt, H.

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0041-624X)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)