Students create self-sanitizing door handle that kills 99.8% of germs

We all know everyone should wash their hands after going to the bathroom, before eating and handling anything that could get contaminated. But how many people actually follow all of these recommendations? While many diseases are transmitted through the air, many others are spread by touching door handles, handrails, countertops, etc. But how could we make sure that these surfaces are always clean?

Sum Ming Wong and  Kin Pong Li came up with the brilliant idea that these germ-spreading surfaces should be able to disinfect themselves. The two Hong Kong teenagers created a special door handle, which in lab tests was able to kill 99.8% of germs and bacteria. They found out about a mineral called titanium dioxide, widely used in manufacturing paints and sunscreens, which has the property of killing bacteria. They also discovered that this specific mineral has its efficiency enhanced when exposed to UV light.

The solution they came up with was to create a glass handle that emits UV light and that has a coating of powdered titanium dioxide. The most ingenious part is that the light shines using energy generated from the movement of opening and closing the door. Best of all, the boys only spent about US$13 to create the handle. The product is not on the market as it was only a science project for the Intel International Science and Engineering Fair, but let’s hope the idea catches on.

Via: Yahoo News

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