The in situ formation of gold nanoparticles in soda lime silicate glass under constant x-ray irradiation is compared with the ex situ formation in preirradiated glasses. The ASAXS measurements confirm that pure Au particles are formed. The comparison shows that the number of particles nucleated under irradiation is about an order of magnitude higher than of those nucleated with preirradiation. ...

As a thermodynamic process, Ostwald ripening is inevitable in solid solution or liquid sol, which usually leads to inhomogeneous morphologies and poor particle size distributions. For decades, how prevent control has been challenge material preparation, especially for obtaining excellent nanomaterials. Here, we propose two important concepts, critical concentration time window, as the keys inhi...

By developing a refrigerator compatible with the parabolic flight of a small jet plane, 4He crystals in a superfluid were obtained in zero-gravity conditions at 0.6K.We report Ostwald ripening of these crystals in the superfluid after being splashed by acoustic waves. Ostwald ripening is a process in which smaller crystals melt and larger ones grow to minimize the overall surface energy. Under ...

Recent experimental results on late stage coarsening (Ostwald ripening) in two dimensions were reinvestigated by means of numerical simulation using the Cahn-Hilliard equation (model B). We determine the spatial particle-particle and charge-charge correlation functions according to the experimental results of Krichevsky and Stavans. We nd that our numerical results correspond well with these ex...

Ostwald ripening, the interfacial-energy-driven dissolution and reprecipitation of solutes, becomes an increasingly significant problem for nanoparticle formulations. We present the first quantitative study of Ostwald ripening for nanoparticle dispersions. The Lifshitz-Slyozov-Wagner (LSW) theory of particle growth driven by diffusion is applied to study -carotene nanoparticles with sizes of O ...