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In this paper we provided the evidence that the Cassie-to-Wenzel transition can be exploited\udas an effective micro-fabrication strategy to obtain highly ordered three-dimensional (3D) arrays of biological\udobjects. To this purpose we fabricated a patterned surface wetted in the Cassie state where we deposited a\uddroplet containing genomic DNA.We found that, when the droplet wets the surface in the Cassie state, an array\udof DNA filaments pinned on the top edges between pillars are formed. Conversely when the Cassie-to-Wenzel\udtransition occurs, DNA can be pinned at different height between pillars. These results open the way to the\udrealization of 3D array of biological object

Controlling the Cassie-to-Wenzel Transition: an Easy Route towards the Realization of Tridimensional Arrays of Biological Objects