Figure 9: Microfluidic pumping device for sandwich immunoassays
An image of the device used for sandwich immunoassays. The channels were filled with food coloring to make them easier to visualize. Reservoirs A, A', B, and B' and buffer reservoir A were not used in these experiments. The dashed square shows the region of the microfluidic device-the assay junction-where the immunoassay is imaged.