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Time-domain Tollens reaction: synthesising silver nanoparticles with the formaldehyde clock
Ronny Kürsteiner1, Maximilian Ritter1, Alla Sologubenko2
1Institute for Building Materials, Department of Civil, Environmental and Geomatic Engineering, ETH Zürich Laura-Hezner-Weg 7 8093 Zürich Switzerland guidop@ethz.ch.
Abstract:
The addition of silver(i) ions to the methylene glycol-sulphite (MGS) clock reaction results in the sudden formation of metallic silver nanoparticles. Stable suspensions are obtained in the presence of poly(vinylpyrrolidone). The time delay before the appearance of the particles, as well as their size, decreases with the initial methylene glycol concentration while their monodispersity increases.
