Abstract
DOI: 10.1002/elps.202200054 The cover picture shows continuous focusing of nanoscale samples using a cascade AC electroosmosis (cACEO) flow. ACEO flow is produced by applying AC signal to the coplanar integrated electrode. The cascade electrode, combining chevron and double-gap geometry, was developed to perform efficient 3D nanoparticle focusing. Chevron electrode was used to generate inward flow from the sidewall to the center area to accumulate particles from the scattering area; then, the DG electrode provides the necessary ACEO to concentrate nanoparticles. The study shows that the cACEO concentrator holds significant potential to concentrate nanoscale samples, such as particles, rare samples, and biomaterials.
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