Journal
POLYMER CHEMISTRY
Volume 12, Issue 37, Pages 5303-5309Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1py00984b
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Funding
- National Natural Science Foundation of China [52073092, 22001071, 51873061]
- Shanghai Scientific and Technological Innovation Projects [19JC1411700, 18JC1410802]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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This study reports the crafting of a superhydrophobic surface with tunable microstructures and wettability using an azobenzene-containing memory polymer as the substrate, and achieves reversible and reliable transformation among different wetting states through photo-manipulation.
New-generation smart surfaces responsive to external stimuli with a controllable wettability have garnered increasing attention in recent years. Notably, a smart surface with a switchable wettability that manifests the facile transition between water-adhesive, rolling isotropic, and rolling anisotropic forms has yet to be explored. Herein, we report the crafting of a superhydrophobic surface with both tunable microstructures and wettability by capitalizing on the azobenzene-containing memory polymer as the substrate. Intriguingly, through photo-manipulation, the azo-polymer film is reversibly and reliably transformed among three wetting states, that is, rose-petal-like water-adhesion, lotus-leaf-like rolling isotropy, and rice-leaf-like rolling anisotropy. Furthermore, the smart superhydrophobic surface is employed as a rewritable platform for droplet transportation. As such, our study expands the category of responsive bio-inspired superhydrophobicity and provides a new strategy to design and access superwetting materials.
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