When you go and think about places in public that would be coated in everyone's germs, what's the first place you think of? I think of public bathroom door handles.
I'm probably not alone in doing this, but when I'm at a public bathroom, I will try to completely avoid touching the entrance and exit door handle, as I know it's covered in everybody's germs. Luckily, my problem could soon be solved as two students out of China have managed to create a self-cleaning door handle.
The door handle uses ultraviolet light to keep itself germ-free. It has aluminum handles at either end and a thin layer of titanium dioxide covering the glass. When the ultraviolet light is enabled, it triggers a chemical reaction that kills off 99.8% of the germs present. How does the UV light turn on? Easy. The two graduate students thought of that and equipped the door handle with a small generator that uses the kinetic energy of the door opening and closing to power itself. What an incredible invention!
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