Low-cost hydrophobic layer as a top plate in two-plate digital microfluidicsGhiasadin Tabatabaeipour, Hassan Hajghassem and Mansoor MohtashamiFarEur. Phys. J. Appl. Phys., 71 1 (2015) 11101DOI: https://doi.org/10.1051/epjap/2015150238