Figure 2From: Helium beam shadowing for high spatial resolution patterning of antibodies on microstructured diagnostic surfaces Protein patterning by helium-beam antibody modification followed by BSA passivation. (a) A top-down beam exposure through a mask allows for selective inactivation of the transparent regions of the mask, while (b) a self-aligned beam exposure of the micro-retroreflector structures allowed for formation of patterns in the regions where shadows are cast.Back to article page