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  • Low-frequency acoustic atomization with oscillatory flow around micropillars in a microfluidic device

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    Author(s)
    Cheung, Yin Nee
    Nam, Trung Nguyen
    Wong, Teck Neng
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2014
    Metadata
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    Abstract
    This letter reports a low frequency acoustic atomization technique with oscillatory extensional flow around micropillars. Large droplets passing through two micropillars are elongated. Small droplets are then produced through the pinch-off process at the spindle-shape ends. As the actuation frequency increases, the droplet size decreases with increasing monodispersity. This method is suitable for in-situ mass production of fine droplets in a multi-phase environment without external pumping. Small particles encapsulation was demonstrated with the current technique.This letter reports a low frequency acoustic atomization technique with oscillatory extensional flow around micropillars. Large droplets passing through two micropillars are elongated. Small droplets are then produced through the pinch-off process at the spindle-shape ends. As the actuation frequency increases, the droplet size decreases with increasing monodispersity. This method is suitable for in-situ mass production of fine droplets in a multi-phase environment without external pumping. Small particles encapsulation was demonstrated with the current technique.
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    Journal Title
    Applied Physics Letters
    Volume
    105
    Issue
    14
    DOI
    https://doi.org/10.1063/1.4897343
    Copyright Statement
    © 2014 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 105, 144103 (2014) and may be found at dx.doi.org/10.1063/1.4897343.
    Subject
    Physical sciences
    Acoustics and acoustical devices; waves
    Engineering
    Microelectromechanical systems (MEMS)
    Publication URI
    http://hdl.handle.net/10072/63737
    Collection
    • Journal articles

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