Simulation of the kinetics of nanoparticle formation in microemulsions.

摘要: Monte Carlo simulations were carried out to explain experimental results concerning the different sizes obtained for Ag and Au nanoparticles synthesized in microemulsions. Computer allowed study interplay between chemical reaction rate material interdroplet exchange, their consequences on mechanism size distribution of It has been shown that, although exchange depends primarily flexibility surfactant film, a slow leads more effective given microemulsion. Two factors contribute this result. Firstly, implies that autocatalytic growth takes place longer period time, because there are available reactants. If is faster, reactants almost exhausted at early stages process. As consequence, only possible beginning. Secondly, continuous production seed nuclei, which can be exchanged micelles due small size, allowing coagulation two (growth by ripening). Once again, take synthesis when faster. Both factors, autocatalysis ripening, favour biggest leading larger particles slower.