(246d) Investigation Into the Role of Particle Size Ratio and Material On Nanoparticle Haloing

Nanoparticle Haloing is a colloidal stabilization method that relies on a small volume fraction of highly charged nanoparticles to stabilize a small volume fraction of negligibly charged colloidal scale particles. While volume fraction plays a significant role in the stabilization of the colloidal particles, it is expected that the size ratio between the two particles will also have a strong influence on the stabilization mechanism as the size ratio will not only change the nanoparticle density within the gap between colloidal particles but it will also change the charge distribution within the gap as well. In this talk, we will investigate the role of the size ratio between the two particles in the stability of a Nanoparticle Haloing system. Additionally, we will touch on the role of nanoparticle charge on the stabilization mechanism by changing the metal oxide used for the nanoparticle. These investigations are vital for the further development and generalization of Nanoparticle Haloing as a colloidal stabilization technique.