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. Author manuscript; available in PMC: 2008 Oct 31.
Published in final edited form as: Biosens Bioelectron. 2007 Jul 20;23(3):444–448. doi: 10.1016/j.bios.2007.05.008

Figure 1. Demonstration of the size -exclusion capability of the porous sensor.

Figure 1

a-b; SEM images of PSi microcavity structure (biosensor substrate) showing erythrocytes filtered out of porous matrix and crosslinked to the surface via glutaraldehyde fixation. a, cross-sectional view. Note the high and low porosity layers in microcavity structure; b, top view with inset showing magnified pores (∼88 nm pore diameter).