Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 5, Pages 6573-6580Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17639
Keywords
bioinspired reversible switch; superoleophobicity/superaerophobicity; oleophilicity/aerophilicity; ethanol; improved antireflective property
Funding
- National Key Research and Development Plan Project [2018YFB1107403]
- China-EU H2020 International Science and Technology Cooperation Program (FabSurfWAR) [2016YFE0112100, 644971]
- Jilin Province Scientific and Technological Development Program [Z20190101005JH]
- 111 Project of China [D17017]
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In this work, the bioinspired reversible switch between underwater superoleophobicity/superaerophobicity and oleophilicity/aerophilicity and improved antireflective property were successfully demonstrated on the nanosecond laser-structured titanium surfaces. Titanium materials were first transformed to be superhydrophobic after nanosecond laser ablation and low-temperature annealing treatments, showing oleophilicity/aerophilicity in water. If the surfaces were prewetted with absolute ethanol and then immersed into water, the surfaces showed superoleophobicity/superaerophobicity. More importantly, the underwater oleophilicity/aerophilicity of the surfaces could be easily recovered by natural drying, and the switch between the underwater superoleophobicity/superaerophobicity and oleophilicity/aerophilicity could be repeated many cycles. Moreover, based on the original antireflective performance of the surface of the laser-ablated micro/nanoscale structures, we demonstrated that the inspired improved antireflective property could be skillfully realized by the prewetting treatment. The developed bioinspired multifunctional materials provide a versatile platform for the potential applications, such as controlling oil droplets, bubbles, and optical behavior.
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