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  • Tunable Particle Focusing in a Straight Channel with Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects

    Author(s)
    Yuan, Dan
    Pan, Chao
    Zhang, Jun
    Yan, Sheng
    Zhao, Qianbin
    Alici, Gursel
    Li, Weihua
    Griffith University Author(s)
    Zhang, Jun
    Year published
    2016
    Metadata
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    Abstract
    In this work, a novel microfluidic platform for tunable particle focusing in a straight channel with symmetric semicircle obstacle arrays using electrophoresis (EP)-modified inertial effects was presented. By exerting an EP force on the charged microparticles, a relative velocity gap between microspheres and fluid in a straight channel with symmetric semicircle obstacle arrays was implemented. The relative velocity and fluid shear will induce shear-slip lift force (Saffman lift force) perpendicular to the mainstream direction. Therefore, the focusing pattern can be altered using the electrophoresis-induced Saffman force. The ...
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    In this work, a novel microfluidic platform for tunable particle focusing in a straight channel with symmetric semicircle obstacle arrays using electrophoresis (EP)-modified inertial effects was presented. By exerting an EP force on the charged microparticles, a relative velocity gap between microspheres and fluid in a straight channel with symmetric semicircle obstacle arrays was implemented. The relative velocity and fluid shear will induce shear-slip lift force (Saffman lift force) perpendicular to the mainstream direction. Therefore, the focusing pattern can be altered using the electrophoresis-induced Saffman force. The effects of electric field direction, flow rate, electric field magnitude, and particle size were also studied. This demonstrates the possibility of adjusting the particle inertial focusing pattern in a straight channel with with symmetric semicircle obstacle arrays using electrophoresis. Manipulation of the lateral migration of focusing streaks increases controllability in applications such as blood cell filtration and the separation of cells by size..
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    Journal Title
    Micromachines
    Volume
    7
    Issue
    11
    DOI
    https://doi.org/10.3390/mi7110195
    Subject
    Nanotechnology
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Analytical
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/408256
    Collection
    • Journal articles

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