Pore Size and Porosity Dependent Zeta Potentials of Mesoporous Silica Nanoparticles

Mesoporous silica nanoparticles (MSNPs) are synthesized in the various forms of porous structures according to an application’s needs, while their zeta potentials play a major role in their function. We show that variation in pore size and/or porosity yields a substantial decrease in MSNP zeta potential up to 25% lower than the theoretical zeta potential predictions for a flat surface at the corresponding ionic conditions in moderate pH range....