Fabricating Tunable Superhydrophobic Surfaces Enabled by Surface‐Initiated Emulsion Polymerization in Water

Abstract Fabricating controllable superhydrophobic surfaces remains challenging in various fields ranging from chemical industries to biomedical engineering. Conventional methods commonly require volatile organic solvents and the assistance of special surface deposition modification equipment, which are detrimental environment limit their applications micro‐devices. Herein, an equipment‐free method is reported directly transform fluorinated monomer micro‐droplets into hydrophobic polymer particles on flat substrate water, simultaneously depositing coatings with tunable structures. The as‐prepared show superior superhydrophobicity great stability extreme conditions (e.g., varying acidity, basicity, heating conditions), excellent anti‐fouling property. Meanwhile, hydrophobicity can be manipulated by adjusting emulsion droplet number density reaction time. Hence, gradients have been successfully fabricated one pot. This study provides facilely fabricate surfaces, potential development smart materials engineering industrial applications.