Self-sanitising Door Handle


Sim Ming Wong and Kin Pong Li, two graduates from the University of Hong Kong, have developed a self-sanitising door handle that disinfects itself using UV light. The handle is made up of two aluminium caps at each end with a glass tube attached to the two ends. The tube is coated with a photocatalytic varnish that has titanium dioxide. When the UV light interacts with the chemical, it initiates a chemical reaction that kills all the bacteria on the door handle. The handle also consists of an internal generator that turns kinetic energy, from the movements of the door, into light energy.

Restroom door handles are known to spread contagious diseases. This self-cleaning door handle acts as a convenient substitute for regular chemical cleaning processes and has proved to kill 99.8% of germs and bacteria during laboratory tests. The designers have designed this door handle especially to combat the recurrence of a Severe Acute Respiratory Syndrome (SARs) epidemic like that which took place in 2003 and infected people in China and Hong Kong.

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