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A novel method to construct 3D electrodes at the sidewall of microfluidic channel

Journal Article


Abstract


  • We report a simple, low-cost and novel method

    for constructing three-dimensional (3D) microelectrodes in

    microfluidic system by utilizing low melting point metal

    alloy. Three-dimensional electrodes have unique properties

    in application of cell lysis, electro-osmosis, electroporation

    and dielectrophoresis. The fabrication process involves

    conventional photolithography and sputtering techniques to

    fabricate planar electrodes, positioning bismuth (Bi) alloy

    microspheres at the sidewall of PDMS channel, plasma

    bonding and low temperature annealing to improve electrical

    connection between metal microspheres and planar

    electrodes. Compared to other fabrication methods for 3D

    electrodes, the presented one does not require rigorous

    experimental conditions, cumbersome processes and

    expensive equipments. Numerical analysis on electric field

    distribution with different electrode configurations was

    presented to verify the unique field distribution of

    arc-shaped electrodes. The application of 3D electrode

    configuration with high-conductive alloy microspheres was

    confirmed by particle manipulation based on dielectrophoresis.

    The proposed technique offers alternatives to

    construct 3D electrodes from 2D electrodes. More

    importantly, the simplicity of the fabrication process provides

    easy ways to fabricate electrodes fast with arc-shaped

    geometry at the sidewall of microchannel

Authors


  •   Li, Shunbo (external author)
  •   Li, Ming (external author)
  •   Hui, Yu Sanna. (external author)
  •   Cao, Wenbin (external author)
  •   Li, Weihua
  •   Wen, Weijia (external author)

Publication Date


  • 2013

Citation


  • Li, S., Li, M., Hui, Y. Sanna., Cao, W., Li, W. & Wen, W. (2013). A novel method to construct 3D electrodes at the sidewall of microfluidic channel. Microfluidics and Nanofluidics, 14 (3-4), 499-508.

Scopus Eid


  • 2-s2.0-84878604375

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/488

Number Of Pages


  • 9

Start Page


  • 499

End Page


  • 508

Volume


  • 14

Issue


  • 3-4

Abstract


  • We report a simple, low-cost and novel method

    for constructing three-dimensional (3D) microelectrodes in

    microfluidic system by utilizing low melting point metal

    alloy. Three-dimensional electrodes have unique properties

    in application of cell lysis, electro-osmosis, electroporation

    and dielectrophoresis. The fabrication process involves

    conventional photolithography and sputtering techniques to

    fabricate planar electrodes, positioning bismuth (Bi) alloy

    microspheres at the sidewall of PDMS channel, plasma

    bonding and low temperature annealing to improve electrical

    connection between metal microspheres and planar

    electrodes. Compared to other fabrication methods for 3D

    electrodes, the presented one does not require rigorous

    experimental conditions, cumbersome processes and

    expensive equipments. Numerical analysis on electric field

    distribution with different electrode configurations was

    presented to verify the unique field distribution of

    arc-shaped electrodes. The application of 3D electrode

    configuration with high-conductive alloy microspheres was

    confirmed by particle manipulation based on dielectrophoresis.

    The proposed technique offers alternatives to

    construct 3D electrodes from 2D electrodes. More

    importantly, the simplicity of the fabrication process provides

    easy ways to fabricate electrodes fast with arc-shaped

    geometry at the sidewall of microchannel

Authors


  •   Li, Shunbo (external author)
  •   Li, Ming (external author)
  •   Hui, Yu Sanna. (external author)
  •   Cao, Wenbin (external author)
  •   Li, Weihua
  •   Wen, Weijia (external author)

Publication Date


  • 2013

Citation


  • Li, S., Li, M., Hui, Y. Sanna., Cao, W., Li, W. & Wen, W. (2013). A novel method to construct 3D electrodes at the sidewall of microfluidic channel. Microfluidics and Nanofluidics, 14 (3-4), 499-508.

Scopus Eid


  • 2-s2.0-84878604375

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/488

Number Of Pages


  • 9

Start Page


  • 499

End Page


  • 508

Volume


  • 14

Issue


  • 3-4