Oxygen barrier of multilayer thin films comprised of polysaccharides and clay

► Multilayered polysaccharide-clay nanocoatings for food packaging applications. ► Layer-by-layer assembly allows for strategic placement of highly oriented clay platelets. ► Nanobrick wall thin films are less than 60 nm thick and completely transparent. ► Oxygen permeability can be reduced to 5.7 × 10−17 cm3 cm/cm2 s Pa.