Superhydrophobic surfaces based on dandelion-like ZnO microspheres |
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Authors: | Qinmin Pan Yuexiang Cheng |
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Affiliation: | School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, PR China |
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Abstract: | This study presents a simple method to fabricate superhydrophobic surface based on ZnO nanoneedles. ZnO nanoneedles had been constructed on zinc layers by immersing in an aqueous NH4OH solution at 80 °C. The ZnO films were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. The ZnO films exhibited excellent superhydrophilicity (contact angle for water was 0°), while they changed wettability to superhydrophobicity with a water contact angle greater than 150° after further chemical modification with n-dodecanoic acid. The procedure reported here only needs readily available reagents and laboratory equipments, which can be applied to various substrates of any size and shape. |
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Keywords: | ZnO microspheres Dandelion-like Nanoneedles Superhydrophobicity |
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