Figure 13.

‘Clam-shell’ plasma separator with top mounted filtration membrane for POC applications. Left: A drop of blood placed is deposited in well, and lid is closed. The top and bottom inner surfaces have been rendered superhydrophobic by applied coatings to contain the blood drop and discourage analyte adsorption to surfaces. Inset: Wetting angle of blood on superhydrophobic surface; Right: After ten minutes, allowing for sedimentation of hemocytes, plasma can be aspirated through separation membrane using a pipette. Inset: Compressed blood sample between two hydrophobic surfaces. From [165].