Three-level cobblestone-like TiO2 micro/nanocones for dual-responsive water/oil reversible wetting without fluorination
In: Applied Physics Letters, Jg. 111 (2017-10-02), S. 141607-141607
Online
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Zugriff:
In this work, a kind of three-level cobblestone-like anatase TiO2 microcone array was fabricated on titanium sheets by femtosecond laser-induced self-assembly. This three level structure consisted of cobblestone-like features (15–25 μm in height and 20–35 μm in diameter), ∼460 nm ripple-like features, and smaller particles (10–500 nm). The formation of microcone arrays can be ascribed to the interaction of alternant laser beam ablation. TiO2 surfaces display dual-responsive water/oil reversible wetting via heat treatment and selective UV irradiation without fluorination. It is indicated that three-level scale surface roughness can amplify the wetting character of the Ti surface, and the mechanism for reversible switching between extreme wettabilities is caused by the conversion between Ti-OH and Ti-O. Moreover, the double-faced superhydrophobic and double-faced superhydrophilic Ti samples were constructed, which exhibited stable superhydrophobicity and underwater superoleophobicity in water-oil solution, ...
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Three-level cobblestone-like TiO2 micro/nanocones for dual-responsive water/oil reversible wetting without fluorination
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Autor/in / Beteiligte Person: | Chu, Jiaru ; Li, Chuanzong ; Hu, Yanlei ; Wu, Dong ; Li, Guoqiang ; Li, Jiawen ; Zhu, Wulin ; Hu, Zhijia ; Zhou, Chen ; Zhang, Yachao ; Wu, Sizhu ; Yu, Liandong ; Zhang, Zhen |
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Zeitschrift: | Applied Physics Letters, Jg. 111 (2017-10-02), S. 141607-141607 |
Veröffentlichung: | AIP Publishing, 2017 |
Medientyp: | unknown |
ISSN: | 1077-3118 (print) ; 0003-6951 (print) |
DOI: | 10.1063/1.4998297 |
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