Abstract The success of foam to reduce CO 2 mobility in enhanced oil recovery and storage operations depends on stability the reservoir. Foams are thermodynamically unstable, factors such as surfactant adsorption, presence oil, harsh reservoir conditions can cause destabilize. Pore-level coarsening anti-coarsening mechanisms not, however, fully understood characterized at pressure. Using lab-on...

The late-stage behavior of a material undergoing a first-order phase transition (due to changes in temperature and/or pressure for example) is characterized by thermodynamic instability resolved through phase separation and consequent coarsening of the emerging phase. In the case of the new phase occupying much smaller volume fraction, and thus appearing as well-separated particles, this coarse...

– We investigate the role of discrete-particle noise in interface-controlled Ostwald ripening. We introduce the noise within the framework of the Becker-Döring equations, and employ both Monte Carlo simulations and direct numerical solution of these equations. We find that the noise drives the system towards a unique scaling regime describable by a limiting solution of a classical continuum the...

1 Ostwald ripening is the last stage of the evolution of a system with two coexisting phases. It is a relatively simple non-equilibrium phenomenon with several interesting features. For example, as the system coarsens it goes through a scaling state, one wich looks the same (up to an overall length scale, which grows) at all times. The dynamics of the problem can be mapped, in two dimensions, o...

Thermally evaporated silver nanoparticles on conducting substrates spontaneously evolve in size when immersed in pure water. The process was studied using scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), and optical absorption spectroscopy. The particles are proposed to reform through an electrochemical Ostwald ripening mechanism driven by the size dependence of the w...

This work reports on the evolution law of helium bubbles in Hastelloy N alloy on post-irradiation annealing conditions. After helium ion irradiation at room temperature and subsequent annealing at 600 °C (1 h), the transmission electron microscopy (TEM) micrograph indicates the presence of helium bubbles with size of 2 nm in the depth range of 0-300 nm. As for the sample further annealed at 850...

This work shows that Ostwald ripening, a universal mechanism responsible for the increase of crystal size during precipitation from solutions, can be meditated by ion diffusion through condensed monolayers of water connecting separated nanocrystals. In an environmental electron microscope we have observed “in-situ” the time evolution of the number, shape, size and crystallographic texture of Na...