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As the most common medical apparatuses, the scalpels are extensively used for tissue cutting. During the tissue cutting process, blood adhesion to the surface of the ordinary scalpel is unavoidable and seriously affects the usability of the scalpel, which may cause medical accidents. Therefore, developing an anti-blood scalpel is of great importance. Herein, we prepare a scalpel with outstanding anti-blood property through coating method. The cleaned ordinary scalpel is immersed in the mixed solution containing nanocomposite ceramic coatings and silicone oil. After drying, the anti-blood scalpel is obtained. It can be observed from the scanning electron microscope (SEM) images that the surface of the anti-blood scalpel possesses microstructures. Compared with the ordinary scalpel, our anti-blood scalpel demonstrates outstanding blood repellence. Blood droplets can easily slide on the anti-blood scalpel surface with ~5° sliding angle. Compared with the existing scalpels with anti-blood property, our scalpel has the ceramic slippery surface rather than the slippery liquid-infused porous surfaces (SLIPSs). The stability of the ceramic slippery surface is much better than the SLIPSs because the SLIPSs are vulnerable under high temperatures and the decomposition products possess poor biocompatibility, which are harmful to human health. Therefore, the anti-blood scalpel has great application prospects in medical treatment.

Superhydrophobic surfaces on aluminum, stainless steel, titanium alloy, and copper substrates were fabricated by nanosecond laser etching and fluoroalkylsilane modification. Compared with the existing laser beam machining technologies, such as femtosecond laser etching and picosecond laser etching, for fabricating superhydrophobic surface, the method developed by us is inexpensive and high efficiency. The influence of laser etching parameters on the surface morphology and wettability on the superhydrophobic surfaces were studied through orthogonal analysis method. The good superhydrophobicity with contact angle larger than 160° was achieved on the aforementioned 4 kinds of metals.