Figure 3.
Suitable volumetric flow for efficient delivery of molecules to the sensor as a function of sensor size. The geometry is based on the channel in Figure 1 and the flow is calculated from Equation (5). A diffusion constant of 10−10 m2/s is assumed for the Brownian motion perpendicular to the surface. Flow rates higher than Qcapt will still increase the delivery rate of molecules but relatively little.