Graphene Facemask to Deactivate Coronaviruses and Bacteria
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Researchers at the City University of Hong Kong have developed a face mask containing laser-induced graphene that can kill bacteria and has demonstrated potential in deactivating coronaviruses.

The graphene layer has antibacterial properties and can generate heat when exposed to sunlight, which may underlie its ability to deactivate coronaviruses.

The researchers hope that such masks could help to reduce viral transmission and infection during the current COVID-19 pandemic.

Researchers have developed a mask made using laser-induced graphene. They produced the material by passing an infrared laser over a carbon-containing polyimide film, which results in a porous graphene layer.

Graphene has antibacterial properties, which are not completely understood, but it can also generate heat when exposed to light, helping with decontamination.

In tests with two types of human coronavirus, the masks inactivated 90% of viral particles in sunlight within just 5 minutes, and 100% within 10 minutes.

The technique is also more environmentally friendly, as the masks are reusable if decontaminated correctly. Numerous carbon-containing materials, such as existing biodegradable biomaterials, can be converted to graphene using this technique.

Source: https://www.cityu.edu.hk/research/stories/2020/09/10/cityu-develops-anti-bacterial-graphene-face-masks
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