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Acoustophoresis of hollow and core-shell particles in two-dimensional resonance modes

Leibacher, Ivo ; Dietze, Wolfgang ; Hahn, Philipp ; Wang, Jingtao ; Schmitt, Steven ; Dual, Jürg

In: Microfluidics and Nanofluidics, 2014, vol. 16, no. 3, p. 513-524

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    Titre
    • Acoustophoresis of hollow and core-shell particles in two-dimensional resonance modes
    Auteur
    • Leibacher, Ivo. Department of Mechanical and Process Engineering, Institute of Mechanical Systems (IMES), Swiss Federal Institute of Technology (ETH Zurich), Tannenstrasse 3, 8092, Zurich, Switzerland
    • Dietze, Wolfgang. Department of Mechanical and Process Engineering, Institute of Mechanical Systems (IMES), Swiss Federal Institute of Technology (ETH Zurich), Tannenstrasse 3, 8092, Zurich, Switzerland
    • Hahn, Philipp. Department of Mechanical and Process Engineering, Institute of Mechanical Systems (IMES), Swiss Federal Institute of Technology (ETH Zurich), Tannenstrasse 3, 8092, Zurich, Switzerland
    • Wang, Jingtao. Department of Mechanical and Process Engineering, Institute of Mechanical Systems (IMES), Swiss Federal Institute of Technology (ETH Zurich), Tannenstrasse 3, 8092, Zurich, Switzerland
    • Schmitt, Steven. Department of Biosystems Science and Engineering, Bioprocess Laboratory (BPL), Swiss Federal Institute of Technology (ETH Zurich), Mattenstrasse 26, 4058, Basel, Switzerland
    • Dual, Jürg. Department of Mechanical and Process Engineering, Institute of Mechanical Systems (IMES), Swiss Federal Institute of Technology (ETH Zurich), Tannenstrasse 3, 8092, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Microfluidics and Nanofluidics, 2014, vol. 16, no. 3, p. 513-524. Springer Berlin Heidelberg
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:324947
    Summary
    Motivated by the applications of ultrasonic particle manipulation in a biotechnological context, a study on acoustophoresis of hollow and core-shell particles is presented with analytical derivations, numerical simulations and confirming experiments. For a long-wavelength calculation of the acoustic radiation forces, the Gor'kov potential of hollow, air-filled particles and particles with solid or fluid core and shell is derived. The validity as well as the applicable range of the long-wavelength calculation is evaluated with numerical simulations in Comsol Multiphysics®. The results are experimentally verified in the acoustic field of an intrinsically two-dimensional fluid resonance mode, which allows for a more complex analysis than the common one-dimensional ultrasonic standing waves or their superposition to two-dimensional fields. Experiments were conducted with hollow glass particles (13.9μm diameter) in a microfluidic chamber of 1.2mm×1.2mm×0.2mm on a silicon-based device with piezoelectric excitation around 870kHz. The described resonance mode is of additional interest for particle trapping and medium exchange on certain particle types, and it reveals a novel approach for particle characterization or separation.