Researchers at Purdue University have developed an antibacterial treatment method for metal surfaces
Researchers at Purdue University have created a new laser processing method that can turn any metal surface into a rapid bacterial killer by giving the metal surface a different texture. The researchers demonstrated in a recent study that the technique can immediately kill resistant bacteria such as MRSA on copper surfaces. Scientists say that copper has been used to kill bacteria for centuries, but it usually takes several hours to kill bacteria.
The single-step laser texturing technology developed by the researchers enhanced the bactericidal effect of the copper surface. The team pointed out that this method has not been specifically used to kill viruses such as coronavirus, because they are much smaller than bacteria. The team also started to use the same process to make other surfaces suitable for killing bacteria, including surfaces of other metals and polymers.
Providing antimicrobial surfaces for medical implants can prevent the spread of infection and antibiotic resistance, because antibiotics are not required to kill bacteria on the surface of the implant. The technology can also be applied to metal alloys with antibacterial properties. The development team used lasers to create nanoscale patterns on metal surfaces. The pattern creates a rough texture and increases the surface area, giving the bacteria more chance to hit the surface and break.
In the past, nanomaterial coatings have enhanced the antibacterial properties of metal surfaces. However, the paint easily peels off and may be toxic to the environment. The laser texturing technique used by the team has two different characteristics. This technique can improve direct contact and make the surface more hydrophilic. In orthopedic implants, this service will allow skeletal cells to attach more firmly, thereby improving the fusion of the implant and bone. The team stated that the process is simple and scalable. They believe that it can be easily converted into existing medical device manufacturing processes.
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