Biomimetic Surface Coatings for Atmospheric Water Capture Prepared by Dewetting of Polymer Films

The synthesis of biomimetic, micro-patterned surface coatings with topographical and chemical features to capture water from a humid atmosphere is demonstrated. The coatings are prepared by dewetting thin polymer films to create materials consisting of raised hydrophilic bumps on a hydrophobic background. An enhanced rate of water condensation is measured on these surfaces under representative climatic conditions.