Corona enhanced electrowetting and dielectrophoresis in a dielectric fluid

E. Capria, Stephen Wilson

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

    1 Citation (Scopus)

    Abstract

    The response to a step voltage of a system comprising a needle-like upper electrode partially immersed in dielectric oil, and a bottom flat electrode has been analysed. The fluid meniscus at the oil-air interface around needle electrode rises up when a voltage is applied and drops down on switch off with characteristic time constants. In the case where the interface has been charged by corona. spraying, after the voltage is switched off and the meniscus has decayed, a secondary lift of the fluid occurs, which raises the fluid to a higher level than before. This is connected to the relaxation of the surface charges and it is present only when corona injection exists. Surprisingly, the system reacts in a similar way when a very low frequency is applied. In this case the fluid can rise to twice the height of that in the DC case.

    Original languageEnglish
    Title of host publicationICPASM 2005: Proceedings of the 8th International Conference on Properties and Applications of Dielectric Materials, Vols 1 and 2
    Place of PublicationNEW YORK
    PublisherIEEE Computer Society
    Pages865-868
    Number of pages4
    ISBN (Print)1-4244-0189-5
    Publication statusPublished - 2006
    EventIEEE 8th International Conference on Properties and Applications of Dielectric Materials - Denpasar, Bali, Indonesia
    Duration: 26 Jun 200630 Jun 2006

    Conference

    ConferenceIEEE 8th International Conference on Properties and Applications of Dielectric Materials
    Abbreviated titleICPADM 2006
    CountryIndonesia
    CityDenpasar, Bali
    Period26/06/0630/06/06

    Cite this

    Capria, E., & Wilson, S. (2006). Corona enhanced electrowetting and dielectrophoresis in a dielectric fluid. In ICPASM 2005: Proceedings of the 8th International Conference on Properties and Applications of Dielectric Materials, Vols 1 and 2 (pp. 865-868). IEEE Computer Society. http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?arnumber=4062803&tag=1