Figure 3
Optimization of magnetron sputtering silver coating according to adhesion strength and antibacterial ability. (A) Pictures of different substrate-pretreated magnetron sputtering silver coating samples after ultrasonic irrigation (40KHZ, 5 min), a: ion polishing, b:200 mesh sandpaper polishing, c:400 mesh sandpaper polishing, d:600 mesh sandpaper polishing. (B) The antibacterial features of magnetron sputtering silver coatings with different thicknesses. abc: coated group, def: uncoated group. The thicknesses of coatings were 0.25 μm(a),0.5 μm(b),0.75 μm(c) respectively. (C) Scratch test results of different coating thicknesses, (0.25 μm, 0.5 μm,0.75 μm). As shown, 400 mesh sandpaper pretreated magnetron sputtering silver coating with 0.5 μm thickness was the best from the perspectives of adhesion strength and antibacterial ability.
