Abstract
A novel approach was developed to fabricate a lotus-leaf-like superhydrophobic surface on a copper foil by simple self-assembly method with the assistance of the porous PDMS template which was used to adjust the oxidized parts of the copper foil surface before self-assembly. The results showed a series of beautiful flower-like microstructures resulting from the self-assembly of cupric stearate that were distributed at regular intervals on the as-prepared copper foil surface similar to the papillae of lotus leaf surface. The water contact angle of the as-prepared copper surface was up to 161° and its sliding angle was only 3°. Its great superhydrophobicity could be kept unchanged after 6 months in air. The formation mechanism of the lotus-leaf-like structure was discussed. This simple and low-cost method is expected to be applied to design and prepare complicated superhydrophobic surfaces with beautiful regular microstructures on different substrates such as stainless steel, zinc, and so on.
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Acknowledgments
The authors would like to acknowledge the support of the Natural Science Foundation of China (Nos. 51103036, 51203183), the Natural Science Foundation of Hunan province (Nos. 10JJ4033, 11JJ3047), the Youth Foundation of Hunan Educational Committee (No. 11B035), and the Science Foundation of Hunan University of Technology (No. 2011HZX06).
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Yuan, Z., Wang, X., Bin, J. et al. Controllable fabrication of lotus-leaf-like superhydrophobic surface on copper foil by self-assembly. Appl. Phys. A 116, 1613–1620 (2014). https://doi.org/10.1007/s00339-014-8472-6
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DOI: https://doi.org/10.1007/s00339-014-8472-6