Figure 12.
DNA-FET sample holder arrangement. (a) The diamond sensor is mounted on a PEEK plate. The drain and source pads are contacted using Cu wire. A second PEEK part (b) with silicon rubber is mounted on top of part (a) and closed to seal the drain–source pads from electrolyte buffer (c). A Pt wire is used as gate electrode and the exposed sensor area is 0.7×1 mm.