Thin and long silver nanowires self-assembled in ionic liquids as a soft template: electrical and optical properties |
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Authors: | Min-Hwa Chang Hyun-Ah Cho Youn-Soo Kim Eun-Jong Lee Jin-Yeol Kim |
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Affiliation: | 1.School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, South Korea |
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Abstract: | Thin and long silver nanowires were successfully synthesized using the polyvinylpyrrolidone (PVP)-assisted polyol method in the presence of ionic liquids, tetrapropylammonium chloride and tetrapropylammonium bromide, which served as soft template salts. The first step involved the formation of Ag nanoparticles with a diameter of 40 to 50 nm through the reduction of silver nitrate. At the growing stage, the Ag nanoparticles were converted into thin and long one-dimensional wires, with uniform diameters of 30 ± 3 nm and lengths of up to 50 μm. These Ag nanowires showed an electrical conductivity of 0.3 × 105 S/cm, while the sheet resistance of a two-dimensional percolating Ag nanowire network exhibited a value of 20 Ω/sq with an optical transmittance of 93% and a low haze value. |
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Keywords: | Silver nanowire Ionic liquid Polyol synthesis Tetrapropylammonium chloride Tetrapropylammonium bromide Self-assembly |
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