Difficulties in reproducing the performances of nanoparticles dispersions areobstructive for the progress of the nanotechnology. A plausible reason for thisvariability is the lack of the control of the stability as well as the dimensions of thenanoparticles in the dispersions. In this work we report results of investigations on thestability of zirconia nanoparticles in aqueous medium, monitoring nanoparticles sizesby means of Transmission Electron Microscopy (TEM), Dynamic Light Scattering(DLS). Nanocrystalline zirconia powders, prepared by microwave-hydrothermalsynthesis, were determined to be 6-8 nm in size by TEM observations. By using DLStechnique the as-prepared dispersions without any further manipulation, i.e. washing,filtering, and so on, resulted in polidispersed aggregates, constituted by the primaryzirconia nanoparticles with an average diameter of 1.3 ± 0.1 mm. After eliminatingsodium chloride from the synthesis solution, the nanoparticles rearrangement in a morestable suspension was found.
|Numero di pagine||4|
|Stato di pubblicazione||Published - 2005|
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