Resumen:
he morphological stability/morphological reshaping of noble metal nanoparticles are studiedexperimentally in order to unravel the chemical mechanisms lying beneath. Gold and silver nanoparticles(AuNPs and AgNPs, respectively) formed in a chloroformic environment are used, as model syntheticsystems, to study the phenomena of morphological change. The morphological evolution of NPs thatfollows their formation, is characterized by spectroscopy (UV-visible, Raman and FTIR) and TEM(Transmission Electron Microscopy). The change of NP morphology involves the increase of the averageNP size and the broadening of size distribution, in a close resemblance with the effect characteristicallyobtained from the Ostwald ripening. The effect of the poor solvating properties of chloroform instabilizing small charged species (H+, Ag+, Au+) as well as the principle of electroneutrality of matter areanalyzed in order to formulate a feasible reaction scheme consisting of a three-step process: thegeneration