Figure 1: Selective adsorption.
(a) Poly(methyl methacrylate) (PMMA) was spin coated on the top of the sample (red) with the top two layers made of Cobalt (grey) and Gold (yellow). (b) Selective areas were patterned using e-beam lithography. (c) The sample was immersed in an ethanolic solution containing the organic molecules (AHPA-L or AHPA-D) (blue). (d) The molecular residue and remaining PMMA were removed by rinsing in ethanol and acetone several times under inert conditions. Selective adsorption areas ranged from 50 × 50 nm2 to 1 × 1 μm2 squares. The molecules were adsorbed at a 40° angle relative to the surface.
