Side view (cross-sectional view) of (a) uncoated glass, (b) 5 wt% CNF nanocomposite coated glass, (c) 2.5 wt% of both CNF and NG nanocomposite coated glass, (d) uncoated PET film, (e) 5 wt% CNF nanocomposite coated PET film, and (f) 2.5 wt% of both CNF and NG nanocomposite coated PET film.