Dynamic Self-Assembly Adhesion of a Paraquat Droplet on a Pillar[5]arene Surface.

The adhesion of herbicide droplets on leaf surfaces plays an important role in the herbicide's adsorption by crops. How to control the adhesive binding which occurs through dynamic self-assembly between the macroscopic droplet and the surface is a challenging task. We introduce a host onto surfaces that controls the binding of guests in the paraquat droplets. The pillar[5]arene-functional surface showed the selective binding of paraquat droplets via the host-guest interaction. The work is promising for improving the efficiency of herbicides.