Arrays of immobilized biomolecules on hydrogel-forming surfaces, their preparation and their use

The invention relates to arrays of immobilized biomolecules that are coupled to an organic surface layer, which is composed of interconnected star-shaped prepolymer essentially, wherein the star-shaped prepolymers having on average at least 4 polymeric arms A, are water-soluble per se, and devices such arrays have. The invention also relates to a process for producing such arrays, and the use of such arrays and devices for diagnostic / analytical purposes.