The repulsion trick: A self-solving puzzle for organic molecules

Researchers have succeeded in controlling the growth of organic molecules using a special trick. Due to their opposing forces, molecules that repel each other always keep a certain distance from their neighbors. Therefore, they mix easily with a second, mutually attracting type of molecule that acts as a sort of ‘glue.’ Tailored surface structures can thus be put together like pieces in a puzzle — in a seemingly self-solving manner.

(via WSJ)