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  • Navigation of Droplets through Micropillars using an AC Electric Field

    Author(s)
    Teo, AJT
    Ho, CMB
    Gao, Y
    Nguyen, NT
    Tan, SH
    Griffith University Author(s)
    Gao, Yongsheng
    Nguyen, Nam-Trung
    Tan, Say Hwa H.
    Year published
    2018
    Metadata
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    Abstract
    We propose a new active mechanism to navigate droplets through a micropillar using an AC electric field. This mechanism enables on-demand droplet merging after head-on collision with a micropillar. In the absence of the electric field, droplets will split into two daughter droplets after collision with the micropillar. By passing an AC electric field across the micropillar, we observed that the electric field allows the split droplets to merge and revert back to become a single droplet. This new phenomenon opens up various exciting new possibilities such as digital signal encoding, generation of droplets of various sizes ...
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    We propose a new active mechanism to navigate droplets through a micropillar using an AC electric field. This mechanism enables on-demand droplet merging after head-on collision with a micropillar. In the absence of the electric field, droplets will split into two daughter droplets after collision with the micropillar. By passing an AC electric field across the micropillar, we observed that the electric field allows the split droplets to merge and revert back to become a single droplet. This new phenomenon opens up various exciting new possibilities such as digital signal encoding, generation of droplets of various sizes and droplet barcoding. We present here the preliminary experimental results obtained by varying both the applied voltages and frequencies.
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    Conference Title
    22nd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2018
    Volume
    1
    Publisher URI
    https://cbmsociety.org/conferences/microtas2018/
    Subject
    Microelectromechanical systems (MEMS)
    Publication URI
    http://hdl.handle.net/10072/382600
    Collection
    • Conference outputs

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