Technology.org April 9, 2020
Researchers at Perdue University have developed a one-step laser-texturing technique that effectively enhances the bacteria-killing properties of copper’s surface. The nanoscale patterns produce a rugged texture that increases surface area, allowing more opportunity for bacteria to hit the surface and rupture on the spot. The technique also makes the surface hydrophilic. In tests against pathogenic bacterial strains with different concentrations including Pseudomonas aeruginosa, and methicillin‐resistant Staphylococcus aureus (MRSA USA300) at 105 CFU mL−1, and Escherichia coli and Staphylococcus aureus at high bacterial concentrations of 108 CFU mL−1 the laser treated copper needed 40, 90, 60, and 120 min to completely eradicate the respective bacterial strain. The technique might apply to metallic alloys that also are known to have antimicrobial properties…read more. Video TECHNICAL ARTICLE
A laser prepares to texture the surface of copper, enhancing its antimicrobial properties. (Purdue University photo/Kayla Wiles)