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A new microfabrication technique creates bubble-based acoustic swimmers at the 10-m scale---the size of a red blood cell. The authors use experiments and a three-dimensional analytical model to analyze the efficient propulsion mechanism of these artificial microswimmers. Such active matter could be used to transport a payload within the bloodstream, or to mix fluids in a lab-on-chip device.
Bertin et al. (Tue,) studied this question.
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