Media reported that implanted medical devices are always at risk of being taken over by bacteria, resulting in infections that sometimes sometimes need to be removed from the body. However, a new type of graphite nano platelet coating may soon reduce the likelihood of such complications. The study was developed by scientists from the University of Chalmers in Sweden.
When a bacteria falls on the coating, the sharp edge of the sheet penetrates its protective layer and kills it, meaning that the bacteria cannot settle on the coating surface of the implant. In fact, this principle is no different from the spiky surface, which is understood to be designed to prevent birds from inhabiting certain areas.
However, one of the problems with graphene, the coating used by the research team in its early days, was that the production cost of the sheet was quite high. Given this limitation, the researchers turned their attention to graphite, a carbon-based material that is cheaper than graphene.
After further research, they created a completely new coating — made of polyethylene substrates and protruding graphite nano platelets — with the most efficient fit ratio of about 15 to 20 percent.
These nanoplatelets work in much the same way as graphene flakes, killing bacteria by cutting them. And more importantly, human cells are unharmed. This is because any cell is 25 times larger than a single bacteria, so platelets only puncture the bacteria.
Postdoctoral researcher Santosh Pandit said: “In addition to reducing patient pain and the need for antibiotics, implants like this can reduce the need for follow-up because they stay in the body much longer than they do now.” Our research also helps reduce the huge cost of global health care services caused by such infections. “
The study was published in Small.