Dresden 2026 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 7: Poster Session I
BP 7.55: Poster
Montag, 9. März 2026, 15:00–17:00, P5
Remotely Actuated Elastic Meta-Lattices using Bjerknes Forces — •Laurin Sartori1, Peer Fischer1,2, and Athanasios G. Athanassiadis1,2 — 1Heidelberg University, Heidelberg, Germany — 2Max-Planck Institute for Medical Research, Heidelberg, Germany
Acoustically-responsive elastic structures have recently gained interest as tools for gentle, wireless manipulation of biological materials. By combining acoustic effects with elastic structures, they can be actuated dynamically to even manipulate single cells in fluidic chambers. However, there is currently a large gap between existing manipulators designed for single cells and larger-scale acoustically-actuatable materials that could be integrated with larger biological tissues or organoids.
Here, we introduce a dynamic acoustic metamaterial that can be change both its geometric configuration and elastic properties in response to sound. The metamaterial consists of an elastic lattice with embedded gas bubbles, and is actuated leveraging the secondary radiation forces between embedded bubbles. By tuning the driving or the microscopic structures the specific response of the material can be tailored. We introduce a numerical model to predict the response of arbitrary lattices, and validate the model experimentally using carefully designed structures that achieve the desired motion.
The engineered lattices shown in this work can be used as building blocks for metamaterials with a remotely tunable stiffness, auxetic properties and memory behavior, providing new interaction paradigms for applications in bio-interfaced soft robotics.
Keywords: Acoustic Actuation; Radiation Forces; Meta-materials