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  • A combined ElectroWetting O...
    Accardo, Angelo; Gentile, Francesco; Coluccio, Maria Laura; Mecarini, Federico; De Angelis, Francesco; Di Fabrizio, Enzo

    Microelectronic engineering, 10/2012, Volume: 98
    Journal Article, Conference Proceeding

    Display omitted ► Si micro-structured superhydrophobic surfaces by plasma etch and optical lithography. ► High water contact angles up to 168°. ► Facile Electrowetting On Dielectric platform working at low DC voltages. ► Potential coupling of the setup with analytical in situ techniques (X-Rays, Raman). A simple and ready to use approach for combining silicon superhydrophobic surfaces with ElectroWetting On Dielectrics (EWOD) phenomenon is presented. The substrate is fabricated using a two-phases process, where a first optical lithography step is used to define the position of the micro-pillars and a second one exploits the characteristics of reactive ion etch Bosch technique. The fabricated substrate has been then coupled with a micro-manipulator tip to show the local changes mechanism of contact angle by applying very low DC voltages in the range from 5 to 30V. The device can be of interest for a wide variety of microfluidics applications related to the biomedical field.