Sub-picosecond laser surface modification of Ti-Ni alloy and its antibacterial activity

Surface modification of titanium nickelide (Ti-Ni) alloy improves its properties, forming a barrier oxidized/carbonized subsurface layer, which blocks the release of toxic nickel ions. We have modified Ti-Ni alloys by structuring the surface with sub-picosecond laser at different radiation parameters. The modified surface was characterized using scanning electron microscopy and layer-by-layer energy dispersive x-ray spectroscopy. The antibacterial properties of structured surfaces were tested against the planktonic culture of Staphylococcus aureus, and the viability was measured by 'Live/Dead' microbiological staining method.

Automated summary

This study investigates the surface modification of titanium nickelide alloy using sub-picosecond laser to form a barrier layer that prevents the release of toxic nickel ions. The modified surface shows improved antibacterial properties and viability against Staphylococcus aureus.