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  • Modeling and optimization of planar microcoils

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    95969_1.pdf (446.2Kb)
    Author(s)
    Beyzavi, Ali
    Nguyen, Nam-Trung
    Griffith University Author(s)
    Nguyen, Nam-Trung
    Year published
    2008
    Metadata
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    Abstract
    Magnetic actuation has emerged as a useful tool for manipulating particles, droplets and biological samples in microfluidics. A planar coil is one of the suitable candidates for magnetic actuation and has the potential to be integrated in digital microfluidic devices. A simple model of microcoils is needed to optimize their use in actuation applications. This paper first develops an analytical model for calculating the magnetic field of a planar microcoil. The model was validated by experimental data from microcoils fabricated on printed circuit boards (PCB). The model was used for calculating the field strength and the force ...
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    Magnetic actuation has emerged as a useful tool for manipulating particles, droplets and biological samples in microfluidics. A planar coil is one of the suitable candidates for magnetic actuation and has the potential to be integrated in digital microfluidic devices. A simple model of microcoils is needed to optimize their use in actuation applications. This paper first develops an analytical model for calculating the magnetic field of a planar microcoil. The model was validated by experimental data from microcoils fabricated on printed circuit boards (PCB). The model was used for calculating the field strength and the force acting on a magnetic object. Finally, the effect of different coil parameters such as the magnitude of the electric current, the gap between the wires and the number of wire segments is discussed. Both analytical and experimental results show that a smaller gap size between wire segments, more wire segments and a higher electric current can increase both the magnitude and the gradient of the magnetic field, and consequently cause a higher actuating force. The planar coil analyzed in the paper is suitable for applications in magnetic droplet-based microfluidics.
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    Journal Title
    Journal of Micromechanics and Microengineering
    Volume
    18
    Issue
    9
    DOI
    https://doi.org/10.1088/0960-1317/18/9/095018
    Subject
    Engineering
    Other engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/62156
    Collection
    • Journal articles

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