Three-level cobblestone-like TiO
                        2
                         micro/nanocones for dual-responsive water/oil reversible wetting without fluorination

Chen Zhou; Guoqiang Li; Chuanzong Li; Zhen Zhang; Yachao Zhang; Sizhu Wu; Yanlei Hu; Wulin Zhu; Jiawen Li; Jiaru Chu; Zhijia Hu; Dong Wu; Liandong Yu

doi:10.1063/1.4998297

Three-level cobblestone-like TiO ₂ micro/nanocones for dual-responsive water/oil reversible wetting without fluorination

Chen Zhou, Guoqiang Li, Chuanzong Li, Zhen Zhang, Yachao Zhang, Sizhu Wu, Yanlei Hu, Wulin Zhu, Jiawen Li, Jiaru Chu, Zhijia Hu, Dong Wu, Liandong Yu

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

In this work, a kind of three-level cobblestone-like anatase TiO ₂ 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. TiO ₂ 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, respectively, even when strongly shaken. Finally, we present the hybrid-patterned TiO ₂ surface and realized reversible switching pattern wettability.

Original language	English
Article number	141607
Journal	Applied Physics Letters
Volume	111
Issue number	14
DOIs	https://doi.org/10.1063/1.4998297
Publication status	Published - 2 Oct 2017

Funding

This work was supported by the National Natural Science Foundation of China (Nos. 51275502, 61475149, 51405464, 51605463, 61505047, 61675190, and 51675503), the Natural Science Foundation of Anhui Province (No. 1408085ME104), the Fundamental Research Funds for the Central Universities (Nos. WK2090000006, WK6030000007, and WK2090090018), the China Postdoctoral Science Foundation (Nos. 2015M571922 and 2016M590578), Fundamental Research Funds for the Central Universities (No. JZ2017YYPY0240), and the “Chinese Thousand Young Talents Program.”

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Zhou, C., Li, G., Li, C., Zhang, Z., Zhang, Y., Wu, S., Hu, Y., Zhu, W., Li, J., Chu, J., Hu, Z., Wu, D., & Yu, L. (2017). Three-level cobblestone-like TiO ₂ micro/nanocones for dual-responsive water/oil reversible wetting without fluorination. Applied Physics Letters, 111(14), Article 141607. https://doi.org/10.1063/1.4998297

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title = "Three-level cobblestone-like TiO 2 micro/nanocones for dual-responsive water/oil reversible wetting without fluorination",

abstract = " In this work, a kind of three-level cobblestone-like anatase TiO 2 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. TiO 2 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, respectively, even when strongly shaken. Finally, we present the hybrid-patterned TiO 2 surface and realized reversible switching pattern wettability. ",

author = "Chen Zhou and Guoqiang Li and Chuanzong Li and Zhen Zhang and Yachao Zhang and Sizhu Wu and Yanlei Hu and Wulin Zhu and Jiawen Li and Jiaru Chu and Zhijia Hu and Dong Wu and Liandong Yu",

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AU - Zhou, Chen

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AU - Li, Chuanzong

AU - Zhang, Zhen

AU - Zhang, Yachao

AU - Wu, Sizhu

AU - Hu, Yanlei

AU - Zhu, Wulin

AU - Li, Jiawen

AU - Chu, Jiaru

AU - Hu, Zhijia

AU - Wu, Dong

AU - Yu, Liandong

PY - 2017/10/2

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N2 - In this work, a kind of three-level cobblestone-like anatase TiO 2 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. TiO 2 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, respectively, even when strongly shaken. Finally, we present the hybrid-patterned TiO 2 surface and realized reversible switching pattern wettability.

AB - In this work, a kind of three-level cobblestone-like anatase TiO 2 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. TiO 2 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, respectively, even when strongly shaken. Finally, we present the hybrid-patterned TiO 2 surface and realized reversible switching pattern wettability.

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Three-level cobblestone-like TiO ₂ micro/nanocones for dual-responsive water/oil reversible wetting without fluorination

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