THE SELECTIVE BINDING TECHNIQUE USING HYDROPHILIC/HYDROPHOBIC PATTERNING FOR SELF-ASSEMBLY

Abstract

We propose and test a technique for selective self-assembly of a several kinds of PDMS blocks with the identical size and shape, using the patterned application of adhesive material. Hydrophilic treatment in specific patterns is applied to the surface of millimeter PDMS blocks using excimer light, which makes the adhesive to attach only on the hydrophobic part. As a result, the PDMS blocks bound selectively to those with identical patterns in the stirring container. We defined the bonds between the same pattern as “correct” bonds and unintended bonds as “erroneous” bonds. We confirmed that the contrast of bonding force between the “correct” and “erroneous” bonds is responsible for the bonding selectivity.