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. 2010 Jan 7;10(2):567–572. doi: 10.1021/nl903468p

Figure 1.

Figure 1

A biosensor, such as a microarray, frequently employs multiplexed sensor patches arrayed on a surface. Analytes may reach the sensor patches by (A) conventional 3D diffusion to the sensor patch of radius r, or two-stage capture of analytes by surface transporters operating in a compartment with radius R and moving to the sensor via (B) diffusive motion or (C) via directed movement along defined tracks.