Dynamically reconfigurable acoustofluidic metasurface for subwavelength particle manipulation and assembly

Sushruta Surappa, Suraj Pavagada, Fernando Soto, Demir Akin, Charles Wei, F. Levent Degertekin and Utkan Demirci ()
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Sushruta Surappa: Stanford University
Suraj Pavagada: Stanford University
Fernando Soto: Stanford University
Demir Akin: Stanford University
Charles Wei: Georgia Institute of Technology
F. Levent Degertekin: Georgia Institute of Technology
Utkan Demirci: Stanford University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Particle manipulation plays a pivotal role in scientific and technological domains such as materials science, physics, and the life sciences. Here, we present a dynamically reconfigurable acoustofluidic metasurface that enables precise trapping and positioning of microscale particles in fluidic environments. By harnessing acoustic-structure interaction in a passive membrane resonator array, we generate localized standing acoustic waves that can be reconfigured in real-time. The resulting radiation force allows for subwavelength manipulation and patterning of particles on the metasurface at individual and collective scales, with actuation frequencies below 2 MHz. We further demonstrate the capabilities of the reconfigurable metasurface in trapping and enriching beads and biological cells flowing in microfluidic channels, showcasing its potential in high-throughput bioanalytical applications. Our versatile and biocompatible particle manipulation platform is suitable for applications ranging from the assembly of colloidal particles to enrichment of rare cells.

Date: 2025
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DOI: 10.1038/s41467-024-55337-0

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