1 Reverse aggregates nucleation induced by acids in liquid-liquid extraction processes Christophe Déjugnat * , Sandrine Dourdain, Véronique Dubois, Laurence Berthon, Stéphane Pellet-Rostaing, Jean-François Dufrêche, and Thomas Zemb Supporting Information This section brings details regarding the following parts: - Dynamic light scattering (page 1) - Static light scattering (page 9) - Activity coefficients (page 21) 1. Dynamic light scattering The first step for exploiting DLS data was to adjust experimental correlation functions (averaged over 3 to 6 single measurements) with monoexponential decays. We have used equation (1):              (1) where G(t) was the correlation function, D t the translational diffusion coefficient, and q the normalized value of the wave vector. Measurements were realized at fixed angle (θ = 173°, backscattering), at fixed wavelength (λ = 633 nm), and always in heptane (refractive index n s = 1.388). Therefore the q value was fixed by the experimental conditions and could be calculated using equation (2):         (2) Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © The Royal Society of Chemistry 2014