Weighing monolayers of colloidal silica particles with a quartz crystal microbalance
A new method of monitoring the deposition of single layers of colloidal particles (10–200 nm in diameter) on a flat surface is described. We demonstrate that with a quartz crystal microbalance (QCM) it is possible to measure directly the addition of one colloidal monlayer of SiO2 particles onto an oxidized Al film, or onto a previously formed multilayer. This technique holds promise for the accurate modelling and control of catalyst preparation, e.g. for the deposition of washcoats, and other applications of monodispersed colloids.
Key wordsMonodispersed colloids quartz crystal microbalance colloidal silica particles desposition of colloids colloids
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