Transferrable superhydrophobic surface constructed by a hexagonal CuI powder without modification by low-free-energy materials.
A new route combining a facile wet-chemical process and spin coating was developed to fabricate a CuI film assembled by hexagonal crystals. Remarkably, such a CuI film displays excellent superhydrophobicity without further modification by low-free-energy materials (thiol or fluoroalkylsilane). The special wettability is attributed to a hierarchical morphology of CuI crystals with two length-scale roughnesses and the nature of the material itself. Importantly, this superhydrophobicity is quite stable and the water contact angle of the as-prepared sample only decreases slightly, even when it is kept in air for about half a year. The superhydrophobicity of the as-prepared CuI powder is a bulk property of the material and not just of its surface, so such a powder coating could then prove useful in conferring superhydrophobicity to other surfaces to which it is applied. These facts might improve its practical application with environmental friendship in superhydrophobic coatings.
Gao
Shuyan
S
College of Chemistry and Environmental Science, Henan Normal University, 46 Jianshe Street, Xinxiang, 453007 Henan, People's Republic of China. shuyangao@henannu.edu.cn
Li
Zhengdao
Z
Yang
Shuxia
S
Jiang
Kai
K
Li
Yue
Y
Zeng
Haibo
H
Li
Liang
L
Wang
Hongqiang
H