# Anti-Adhesion Superhydrophobic High-Frequency Electrotome
## 3 Results and Discussion
This not only enhances the electrical conductivity of the HFE, but also provides a good basis for subsequent meat-cutting experiments. In this experiment, we selected porcine blood and pork tissues as the experiment materials to evaluate the anti-adhesion performance of HFE and SH-HFE. The experiments were conducted to investigate the anti-adhesion capability of HFE and SH-HFE by immersing these samples into the pig blood and measuring the mass of blood remaining on the surface, as shown in Figure 7a-f. In addition, we also tested HFE with only laser patterning treatment, without stearic acid modification, and HFE with only stearic acid modification, without laser patterning treatment, as shown in Figures S3 and S4. As shown in Figure 7c, a large amount of crimson blood with a weight of about 967 mg adhered to the surface of the ordinary HFE. In contrast, the amount of blood residue on the surface of SH-HFE was significantly reduced except for the SAP1 structure. In particular, the SH-HFE with the SAP3 structure showed almost no visible blood residue, as shown in Figure 7f and Video S1, and the mass of adhered blood was only 50 mg, which is an 89.7% reduction in the adhered mass, a result that proves its good blood anti-adhesion properties. When SH-HFE is fully immersed in blood, the unique structures on the SH-HFE surface are able to stably trap the air layer, effectively preventing the blood from fully penetrating into the surface. This design ensures that when HFE is removed from blood, it is difficult for the blood to adhere to the surface of HFE. The SEM of the ordinary HFE and these three SH-HFEs with different patterns after the blood adhesion experiments are shown in Figure S5. In addition, we used pork to simulate human tissues and conducted cutting experiments on fresh pork tissues using HFE and SH-HFE to investigate the tissue anti-adhesion ability of the different samples. In these experiments, we used a medical high-frequency power supply with a set output power of 40 W to cut the pork tissue at a speed of 5 mm/s and a depth of 10 mm. By measuring the quality of pork tissue adhering to the different surfaces after cutting, we compared the tissue anti-adhesion capacity of the different surfaces. As shown in Figure 7b, the mass of pork adhered after cutting with the ordinary HFE was about 18.4 g, whereas the mass of pork adhered after cutting with SH-HFE was reduced in all cases. The mass of adhered tissue on the SH-HFE with the SAP3 structure was only 1.9 g, which was a 94.8% reduction in adherent mass compared with the ordinary HFE, showing a significant reduction in tissue adhered, as shown in Figure 7j and Video S2. Figure 6: Resistance tests of (**a**) ordinary HFE and (**b**) SH-HFE surfaces. The SEM of the ordinary HFE and these three SH-HFEs with different patterns after the tissue adhesion experiments are shown in Figure S6. The microstructures enhance the anti-adhesion performance of SH-HFE by reducing the contact area with soft tissues and leveraging the effect of air within the microtextures. Figure 7: (**a**) Blood adhesion experiment. (**b**) Mass of blood and tissue adhering to the surface of ordinary HFE and SH-HFE. Photographs of blood adhesion experiments on (**c**) ordinary HFE, (**d**) SAP1, (**e**) SAP2, and (**f**) SAP3 surfaces. Photographs of tissue adhesion experiments on (**g**) ordinary HFE, (**h**) SAP1, (**i**) SAP2, and (**j**) SAP3 surfaces.