Fig. 6
From: A micro-dispenser for long-term storage and controlled release of liquids

Schematic illustration of the micro-dispenser technology (two configurations). Panels (a) and (b) show the micro-dispenser components and assembly, panel (c) shows manual actuation by pressing the micro-dispenser body. Panel (d) shows the micro-dispenser inserted in a lab-on-a-disc platform, when the centrifugal pressure is lower than membrane resistance, panel (e) by increasing the spinning speed, centrifugal force stretches the membrane that allows a temporary release of liquid. The micro-dispenser size is exaggerated for clarity