On account of their wide range of applications in self-cleaning, anti-icing, frost suppression, etc., superhydrophobic surfaces have attracted considerate attention. However, most of the superhydrophobic surfaces can only be prepared on the surfaces of specific materials and are easily damaged in the case of friction. In this work, we propose a facile method to achieve superhydrophobicity on various substrate surfaces. By femtosecond laser direct processing, micron-level grooves and protrusions are constructed on substrates to form a protective layer. Then, the substrates covered by polytetrafluoroethylene (PTFE) were scanned to make the surfaces of the substrates superhydrophobic. Since the PTFE micro-nano-particles are evenly distributed on the grooves and protrusions, the surfaces exhibit robust superhydrophobicity with excellent anti-friction performance that is independent of the substrate properties. This work provides an efficient and environmentally friendly path for achieving robust superhydrophobic surfaces on various substrates.

Facile fabrication of hierarchical textures for substrate-independent and durable superhydrophobic surfaces.

A review of modified metal bipolar plates for proton exchange membrane fuel cells

Cavitation erosion characteristics at various flow velocities in NaCl medium of carbide-based cermet coatings prepared by HVOF spraying

A superhydrophobic TPU/CNTs@SiO2 coating with excellent mechanical durability and chemical stability for sustainable anti-fouling and anti-corrosion

Enzyme hybrid virus-like hollow mesoporous CuO adhesive hydrogel spray through glucose-activated cascade reaction to efficiently promote diabetic wound healing

Design of mechanical robust superhydrophobic Cu coatings with excellent corrosion resistance and self-cleaning performance inspired by lotus leaf

A mosquito-eye-like superhydrophobic coating with super robustness against abrasion

Volcano-like hierarchical superhydrophobic surface synthesized via facile one-step secondary anodic oxidation

Cavitation erosion behaviors of surface chromizing layer on 316L stainless steel

The antibacterial properties of the microarc oxidation coating have gained wide attentions, and W-containing surface has been verified to be notably bactericidal. Herein, in this work, doping Na2WO4 into the electrolyte to prepare the antibacterial W-containing microarc oxidation coating is proposed for the first time. No obvious crystal phase related to hexavalent W exists in the coating, and sodium tungstate may transform into a trace amount of tungsten oxides and amorphous substances. The sodium tungstate plays a crucial role in the antibacterial capability of the coating, the W-containing coating exhibits conspicuous bactericidal performance against both planktonic and adherent Escherichia coli and Staphylococcus aureus. The antibacterial mechanism of the W-containing coating is first revealed to be linked to the extracellular and intracellular reactive oxygen species (ROS). The W-containing dissolved matters spontaneously trigger the formation of the extracellular ROS, which directly destroy the bacterial cytoderm and cytomembrane. Meanwhile, the nanoscale W-containing dissolved matters penetrate the cell wall, and stimulate the generation of intracellular ROS which interact with the cytoplasmic components. Ultimately, the bacteria die from the cooperative effects of the extracellular and intracellular ROS.

The antibacterial W-containing microarc oxidation coating on Ti6Al4V

Xinwen Zhang

Papers

Design of mechanical robust superhydrophobic Cu coatings with excellent corrosion resistance and self-cleaning performance inspired by lotus leaf

A mosquito-eye-like superhydrophobic coating with super robustness against abrasion

Volcano-like hierarchical superhydrophobic surface synthesized via facile one-step secondary anodic oxidation

Cavitation erosion behaviors of surface chromizing layer on 316L stainless steel

The antibacterial W-containing microarc oxidation coating on Ti6Al4V