Design of Stimuli-responsive Surface for Reversible Wettability Switching by Vapor-Phase Assisted Photo-polymerization

In exploring the development of stimuli-responsive surfaces capable of reversible wettability switching, our study delved into the efficacy of vapor-phase-assisted surface photo-polymerization (photo-VASP). This innovative approach modulated Si-wafer and cotton surfaces’ chemical and physical attributes. The method involved strategically using a blend of hydrophobic and hydrophilic vinyl monomers, enabling fine-tuning surface properties. By carefully selecting monomer combinations, we achieved seamless copolymerization, effectively grafting the polymers onto the surfaces. The efficacy of this grafting process was validated through contact angle measurements post-solvent extraction of unattached polymers. Crucially, the surfaces engineered through this process demonstrated a remarkable capacity for reversible wettability switching, a feature dynamically controlled by the application and removal of external stimuli. This capability underscores the potential of our approach in creating advanced functional surfaces with tunable properties.