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To prepare the nano-scale silver carboxylate emulsions and investigate their applications?in the preparation of nano-scale silver films, the silver citrate emulsion was synthesized through the?reaction of silver nitrate with sodium citrate in the presence of polyvinylpyrrolidone (PVP) as a?surface modification agent in water. The emulsion was coated onto the surface of the PET substrate?to form a thin latex layer of silver citrate. And this was followed by drying at about 100 °C. Then,?the silver citrate thin film was deoxidized by aqueous ascorbic acid. Finally, a translucent silver thin?film was formed on the surface of the PET substrate. Properties of the silver citrate emulsion and?the silver film on the PET were characterized by X-ray powder diffraction (XRD), Fourier?transform infrared spectroscopy (FTIR), laser particle size analysis, scanning electron microscopy?(SEM), thermogravimetry(TG) ,UV-visible absorption spectroscopy, atomic force microscopy(AFM)?and digital multimeter analysis. It was found that the silver citrate particle surface-modified by PVP
has a nano-rod structure and homogeneous size distribution. The nano-rod was about 20 nm in?diameter and 200 nm in length. For the UV-visible absorption spectrum of the thin film exhibited an?absorption peak at 430 nm, the silver thin film prepared on the surface of the PET substrate was a?typical nano-scale sliver film. Measurements of the sliver thin film at room temperature indicated?that the silver film was electrically conductive, and the surface resistance was 2.42 k5/cm.