Realizing temperature-controlled digital microfluidic chips with versatile microelectrodes

Jen Hung Wei, Wen-Syang Hsu, Shih Kang Fan*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

Droplet heating and pumping were performed on a versatile microelectrode by selectively applying appropriate electric signals. The designed electrode is in a meander-line shape and covered by an insulator. On the one hand, when a potential difference is applied along the electrode, power dissipated by the resistance of the electrode causes droplet heating. On the other hand, when an electric field exists across the insulator above the electrode, the charges stored in the capacitor alter the surface wettability and pump droplet. Manipulated droplets were placed between parallel plates with passivated versatile microelectrodes on the bottom plate and a Teflon-coated blank ITO on the top plate. We successfully applied a DC voltage at the two terminals of the meander-line electrode to heat up the electrode as well as the droplet above. Besides, pumping droplets by EWOD was demonstrated by applying a proper AC voltage between the electrode on the bottom plate and the ITO on the top plate. With the proposed versatile microelectrode design and actuation scheme, heating and EWOD were obtained on an identical electrode. A digital microfluidic chip capable of droplet manipulation by EWOD and droplet heating was presented.

Original languageEnglish
Title of host publicationProceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
Pages981-984
Number of pages4
DOIs
StatePublished - 28 Aug 2007
Event2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 - Bangkok, Thailand
Duration: 16 Jan 200719 Jan 2007

Publication series

NameProceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007

Conference

Conference2007 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007
CountryThailand
CityBangkok
Period16/01/0719/01/07

Keywords

  • Digital microfluidics
  • EWOD
  • Resistance heater

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    Wei, J. H., Hsu, W-S., & Fan, S. K. (2007). Realizing temperature-controlled digital microfluidic chips with versatile microelectrodes. In Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007 (pp. 981-984). [4160485] (Proceedings of the 2nd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2007). https://doi.org/10.1109/NEMS.2007.352182