Fabrication of Stable Superhydrophobic Cupric Hydroxide Surface with Hierarchical Structure on Copper Substrate |
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Authors: | LIU Hong-qin XU Wen-guo LU Shi-xiang |
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Affiliation: | Institute for Chemical Physics, School of Science, Beijing Institute of Technology, Beijing 100081, China |
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Abstract: | Cupric hydroxide films with a new hierarchical architecture consisting of beautiful nanotubes and nanoflowers were directly fabricated on copper substrate via a solution-immersion process at a constant temperature of 23℃. Stable superhydrophobic Cu(OH)2 surface was obtained after Cu(OH)2 films were modified with hydrolyzed 1H, 1H, 2H, 2H-perfluorooctyltrichlorosilane (C8H4Cl3F13Si, FOTMS). The surface morphology and composition of the film were studied using scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), respectively. Result shows that the surface of Cu(OH)2 films directly grown on copper substrate was hydrophilic, whereas the modified Cu(OH)2 films exhibited the superhydrophobicity with a water contact angle (CA) of about 160.8°, as well as a small sliding angle (SA) of about 1°. The special hierarchical structure, along with the slow surface energy leads to the high superhydrophobicity of the surface. |
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Keywords: | Cu(OH)2 films hierarchical architecture superhydrophobic surface contact angle |
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