Instead of a large cluster, only dimers and trimers of NPs were observed and the average number of neighbors stayed below 1. The same conclusions can be achieved by the analyses of the NP-NP interaction energy evolution in both dispersions (Figures and), which displays a faster decrease for hydrophilic than for hydrophobic NPs. However, care must be taken when comparing the variation of NP-NP interaction: While the most important effect is the faster aggregation, the interaction energy for each contact is more negative for hydrophilic than for the hydrophobic particles (Table ). Is important to notice that this simulation doesn't achieve an equilibrium state, with the first g(r) peak and the corresponding coordination number still increasing, however, those results already show a stronger kinetic stabilization due to the stronger solvent organization around the hydrophobic NPs in comparison to the hydrophilic NPs.