The energy generated by using microwave irradiation provided fast and homogeneous heating through the dielectric heating of the medium (H2O) promoting nanoparticles nucleation and growth (Fig. 1a). The pressure and power oscillation between the 4th and the 7th minute indicates the liquid-liquid system breakdown because of the nanoparticles formation. The synthesis stage was maintained under these conditions for additional 3 min under vigorous agitation, to guarantee the nanoparticles homogeneity.