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Superhydrophobic nano Cu/Al 2 O 3 Ni–Cr composited coating with a low adhesive force was deposited onto the Q345 carbon steel via electro-brush plating. Surface morphologies of nano Cu/Al 2 O 3 Ni–Cr composited coating were investigated by scanning electron microscope (SEM). Chemical compositions were characterized by energy dispersive spectroscopy (EDS). First of all, by adjusting different process parameters such as working voltage, relative velocity, Cu particles concentration and plating time, we obtain the most optimal parameters: working voltage is 15 V, relative velocity is 4.8 m/min, Cu particles concentration is 5 g/L and plating time is 60 s. Under the best process parameters, the water contact angle reaches to 156° and a sliding angle is less than 2° on the nano Cu/Al 2 O 3 Ni–Cr coating. Then the mechanism of the superhydrophobic and low adhesion characteristic of this surface were explained by Cassie's model. Low adhesive force can be characterized by max rebound height of water droplet. As a result, to achieve low adhesive surface it is necessary to decrease the fraction of the solid/liquid interface under the water droplet. Finally the coating was proved to have an excellent self-cleaning performance. [ABSTRACT FROM AUTHOR]

We demonstrate the formation of micro/nanoparticles and nanogratings on the zinc surface induced by a 150 fs, 775 nm laser. The nanoprotrusions or nanocavities of different sizes were fabricated by different laser pulses and laser fluences. A smaller nanoprotrusion or nanocavity can be produced by a smaller number of laser pulses and lower laser fluences. Also we report the formation of nanogratings and micro/nanoparticles when the laser beam scans the zinc surface. We observe a composite structure with nanogratings and microparticles on the zinc surface when the laser fluence is 0.3 J/cm. This phenomenon proves that the process of transformation from microparticles to nanogratings is a dynamic processing. Therefore, the use of femtosecond-laser ablation of zinc surfaces may be considered as an efficient technology to obtain various micro/nanostructures. [ABSTRACT FROM AUTHOR]

Fabrication of surfaces with capability of repelling both water and oil is badly needed. Meanwhile, the widespread use of nanomaterials has also attracted great interest in this field. In this paper, we provided novel methods to synthesize nano amorphous tungsten oxide coatings on Al-Mg metals. After modification with FAS-17, the surface could obtain excellent superamphiphobic abilities with lower sliding angles and higher contact angles to water and oil. In addition, outstanding anti-oil pollutant and low adhesion were obtained. Furthermore, the as-prepared superamphiphobic surfaces could survive 200 cm abrasion distance under 19.6 kPa pressure on 1000 grid SiC sandpaper. It should be noted that this coatings could obtain different colors in different temperature. Meanwhile, we found that the droplets with lower surface energy and low viscosity are easier to bounce than the droplets with high surface energy and high viscosity. So the simple procedure and excellent superamphiphobicity about fabricating colorful tungsten oxide coatings have great potential in protecting Al-Mg metal and have potential applied in signals which need to prevent wetting or pollution by water and oils. On one level, this method about synthesizing nano amorphous tungsten oxide also has more promising using in other fields. [ABSTRACT FROM AUTHOR]