Molecular transport directed via patterned functionalized surfaces

Patterned polymer brushes are shown to direct the solid-state diffusion of dye molecules on solid surfaces. The dye molecules diffuse rapidly across the patterned regions, but not on the bare substrate. A poly(dimethyl siloxane) device containing a singular fluidic channel covers the patterns and bare regions and serves to introduce the diffusive species into the polymer brush. Transportation of dye to desired locations on the substrate is demonstrated.