▎ 摘　　要

NOVELTY - The facemask (101) has a substrate (103) has an inner surface for being worn over the mouth and nose of a person. The substrate having an outer surface for facing away from the mouth and nose of the person and the inner surface comprises three dimensional graphene. The three dimensional comprises laser induced grapheme and hydrophilic graphene. The graphene is more hydrophilic towards one side of the substrate and less hydrophilic towards the other side of the substrate. A diode that is arranged across the graphene such that electrical potential difference generated in the graphene is able to light the diode. The substrate comprises polyimide, paper, polyethersulfone, polysulfone, melt-blown fabrics, woven fabrics and felted-fabrics. USE - Face mask used in laboratories or where wearer wants to prevent inhalation of smells and particles. Can also be used for doctors and nurses who are in close contact with patients. ADVANTAGE - The facemask has antibacterial and antiviral properties. It is more hygienic and easier to reuse. It provides the possibility of inducing a graphene layer on a mask made in the conventional way. It can be washed and reused without damaging the mask structure. It does not require the use of liquid disinfectant after taking it off to have a meal, and wearing the mask again after the meal. It prevents the growth of other types of microbes. It protects the mask from birds and people while sunning the mask. It improves the inhibition rate to 81% and 99.998% bacterial killing efficiency within 10 minutes if brought into the sun under the photothermal effect induced in graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of functionalizing a carbonaceous material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the face mask. 101Face mask 103Substrate 105Provided loop