Inspired from butterfly wing, superhydrophobic copper mesh films were fabricated via a facile and environmental friendly method by electroplating Cu nanoparticles on the as-cleaned copper mesh films and followed by a thiol grafting. As-fabricated hierarchical structured copper mesh film showed efficient and rapid oil/water separation ability and could be repeatedly used for numerous times. The key parameters of the fabrication of suitable surface morphologies, including the electroplating time, current, electrolyte temperature, and electrolyte concentration, were particularly studied. The stability of as-prepared copper mesh film was also evaluated by compression, thermal, and ultrasonic tests.

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See supplementary material at http://dx.doi.org/10.1063/1.4817922 for details about the materials and methods, theoretical consideration, SEM images of butterfly wing and as-prepared copper mesh films with different electroplating times, photographs of pristine and superhydrophobic copper mesh film, potential-time curve, relationship of the electrolyte temperature and concentration of CuSO4 with water CA and SA, compression, thermal and ultrasonic tests, and permeation test.

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