Microwave sterilisation

The kitchen device provided the solution to efforts by a team of researchers, led by senior research scientist Dr Andy Wright, to come up with a low-cost, chemical-free solution to killing harmful bacteria on medical tools used in GP, dentist and veterinary surgeries.

Traditionally, steam at high temperatures has been used to sterilise medical instruments before being used on patients. However, with bacteria becoming more resistant to such treatments, aggressive chemicals have increasingly been used in recent years.

Now, researchers at the university’s Advanced Materials Unit have discovered that by attaching a vacuum vessel to a microwave oven, plasma discharges can be generated in the form of atomic oxygen and ozone - both aggressive gases that are highly effective in killing bacteria.

Dr Wright said that tests have shown the technology to be just as effective as existing steam-based methods of sterilisation - if not more - but at a fraction of the cost. The device is capable of sterilising equipment in five minutes or less with air.