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Transparency of the PCN-coated SiO2 surface. (A) A photo of a PCN-coated surface indicating the coating’s transparency. (B,C) Photos depicting the contact angles of a clean SiO2 surface (B) and a PCN-coated SiO2 surface (C). (D) Visible light range transmittance spectra of a clean SiO2 surface and a PCN-coated surface.
