Table 1.

Selected studies on anti-SARS-CoV-2 PPE and surface coating

Composition	Application	Fabrication method	Results	Ref
Ag nanocluster/silica composite	Facial FFP3 mask	Radio frequency co-sputtering	100% inhibition	[17]
Ag NPs	Polycotton fabrics	Pad-dry-cure	99.99% inhibition	[18]
SiO2-Ag nanoparticles	Air filter	Aerosolized coating	92% inhibition	[19]
Ag	Surfaces	N/A	Inadequate in a naturalistic medical environment	[20]
Iron oxides	Fabric	N/A	Ideation	[21]
NPs combined with standard polylactic acid	Powered air-purifying respirators	Fused deposition modeling (FDM)	N/A	[22]
Graphene and its derivatives	Filters	N/A	Ideation	[23]