Figure 2

(a) Reflectance as a function of wavelength for different coating conditions (inset: photograph of the highly transparent coating solution in a vial). Coating thickness = 160 nm. (b) Photographs showing light reflection from the bare PET film and the coated PET films (one side and both sides). Light reflection is significantly reduced after coating. (c) Contact angles (water (H₂O), hexadecane (C₁₆H₃₄), and diiodomethane (CH₂I₂)), surface energies, and sliding angles before and after coating. γ_s^d, γ_s^p, and γ_s^t indicate the dispersion component, polar component, and total value of γ_s^d and γ_s^p, respectively. (d,e) Anti-contamination performance of the coating film after writing the letter ‘m’ with permanent marker and wiping the lower portion of the surface with a tissue: (d) bare PET film and (e) coated PET film.