These findings demonstrate how subtle modifications to the hydrocarbon tails of ligands can lead to significant changes in interparticle interactions. Next, we explore the factors that determine interparticle interactions. We first examined the relationship between the strength of attraction and ligand crystallinity. Figure shows the trends of ε t and ε l for ligands inducing interparticle attractions as a function of χ. Overall, χ correlates negatively with ε. However, due to the diverse modifying fragments in our designed ligands, a direct correlation between ε and χ is not evident from Figure . In our various ligand systems, the pairs of nanoparticles coated with dDB, dBR, and dNR exhibit minimal differences in η t and η i . Compared to chain-type ligands (dBD, dBC, and OD), ring-type ligands (dBR and dNR) appear to achieve deeper attractive wells without requiring high crystallinity. This may be attributed to the significant differences in the interactions between aromatic rings and the solvent (also a chain-type hydrocarbon.)