A reusable, pressure sensitive adhesive surface with non-uniform, hierarchical nanopillar structures and a method of preparing the same by morphological self-organization and crosslinking of a porous hydrogel template, controlling the 5 amount of water removed from the gel layer and further by moulding the template with a cured elastomer layer. The pore size and shape of the gel template can be controlled by the crystals of the precipitant which are formed during the gel forming reaction and the adhesion strength of the adhesive can be varied from 0.2-1.3 N/cm2 by varying the aspect ratio of 10 the pillars.
