Abstract
Herein, we demonstrated a facile one-step fabrication strategy combining both chemical deposition and self-assembly of stearic acid for the fabrication of superhydrophobic porous Cu films on the Al substrates. The scanning electron microscopy and white light interferometer showed that the multi-scale porous structures comprising micron-sized pores and nano-sized fishbone-like dendrites were formed on the sample. X-ray diffraction and Fourier-transform infrared spectrophotometer revealed the deposition of Cu and the grafting process of stearic acid on the films. In addition, the formation mechanism of the superhydrohobic surface was explained, and the processing conditions were investigated to determine their effects on the wettability. The resultant sample revealed superhydrophobicity with a water contact angle of 159 ± 1°, a sliding angle of ca. 4° and great bouncing behaviour of water droplets. Moreover, such a surface exhibited a stable superhydrophobicity even after six weeks of ambient air exposure.
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