Process for printing an adhesive pattern on a polymer brush extending at the surface of a support (1), forming a nanometric anti-fouling layer (2), the process comprising the following steps: —placing the layer (2) in contact with a first aqueous solution (4) containing a benzophenone, —then illuminating the layer with radiation (3) at a wavelength within the absorption spectrum of benzophenone, according to the pattern and according to a surface energy.