Explore ion correlations and excluded volume effects in aqueous electrolyte solutions containing charged nanoparticles in this 31-minute conference talk by Guillermo Ivan Guerrero Garcia from the University of San Luis Potosi. Delivered as part of the KITP Conference on Structure Design and Emerging Phenomena in Nanoparticle Assemblies, the presentation delves into the complex interactions at the mesoscale where atomic properties meet structural complexity. Gain insights into the interdisciplinary nature of nanoparticle assembly, encompassing chemistry, materials science, chemical engineering, and physics. Discover how this field bridges quantum function with flexible interactions to create functional materials. Learn about current developments in the field and potential future directions for research and technological advancements in nanoparticle assemblies.