TY - JOUR
T1 - Three-level cobblestone-like TiO
2
micro/nanocones for dual-responsive water/oil reversible wetting without fluorination
AU - Zhou, Chen
AU - Li, Guoqiang
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
Y1 - 2017/10/2
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.
UR - http://www.scopus.com/inward/record.url?scp=85031749096&partnerID=8YFLogxK
UR - https://aip.scitation.org/doi/10.1063/1.4998297
U2 - 10.1063/1.4998297
DO - 10.1063/1.4998297
M3 - Article
AN - SCOPUS:85031749096
SN - 0003-6951
VL - 111
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 14
M1 - 141607
ER -