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A Simple Preparative Route to Highly Stable Dispersions of Uniform Silver Nanoparticles

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Stable dispersions of uniform silver nanoparticles were prepared by heating silver salts in polyols in the presence of a naphthalene sulfonate/formaldehyde copolymer as dispersant. In the temperature range explored (150–190 °C) the modal size and the size distribution of the particles depended on the nature and concentration of the silver salt and the polyol used. Highly dispersed uniform nanoparticles with a diameter of ∼12 nm were obtained by reducing silver salicylate in diethylene glycol at a metal concentration of 2.5 × 10−2 mol·cm−3. Larger silver nanoparticles (∼30 nm) and more concentrated dispersions (1.0 mol·cm−3) were prepared in ethylene glycol. In all cases the selected dispersant yielded remarkably stable silver sols and facilitated the transfer of the nanoparticles into water, while preserving the stability of the dispersions.
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Document Type: Research Article

Publication date: 2009-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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