Abstract
Cerium and europium trifluoride nanocrystals have been obtained in a Taylor’s double-cone electrospray by chemical reactions of precipitation from two miscible aqueous solutions of rare earth (RE=Ce,Eu) nitrates and HF. The products of the chemical reactions CeF3 and EuF3 have a very low solubility precipitating as nanocrystals of controllable size and composition. The change of the starting concentration, from 0.13 M Ce(NO3)3 to 0.01 M Eu(NO3)3, seems to have influence on the morphology of the nanoparticles, producing well crystallized EuF3 nanocrystals for the dilute solution and mosaic-like multidomain CeF3 nanocrystals for the more concentrated solution. This procedure can be used for the production of a great variety of inorganic compounds. The low-solubility requirement of the products of chemical reactions is the only key and it assures a high rate of insoluble crystals formation.
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