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Hydrophobic ZnO used in EWOD technology and SAW devices for better bio-fluid slip AT microchannel walls controlled by DC pulses

In this paper, we will review the electrowetting on dielectric (EWOD) principles applied to microfluidic devices. We replaced the usually used teflon surface by ZnO transparent film in order to obtain a device with an optical weak absorption in the diapason ranged from VIS to far-MIR and THz waves. We studied the piezoelectric characteristics of ZnO films obtained by RF magnetron sputtering in Ar+O2 plasma. ZnO films have been grown on SiO2/Si(100) substrate using a zinc oxide target. The morphological characteristics of the films were investigated by atomic force microscopy (AFM). We present the THz spectra from ZnO films.