Harmonic potentials with a force constant of 2500 kJ mol -1 nm -2 were applied between neighbor sites of the NP to hold its structure. Using the same structure, two different NPs were studied by changing the interaction potential used to describe them, being the sites of the hydrophilic NP described by the type P4 and the ones from the hydrophobic by the type C1. One P4 site presents a transfer free energy between oil and water of ca. -17 kJ/mol while the C1 presents a value of ca. 17 kJ/mol. Thus, a NP described by P4 sites would be strongly hydrophilic and can represent a ceramic NP with the surface covered by OH groups while the NP formed by C1 sites is strongly hydrophobic such as a particle with a surface covered by CH 3 groups. Interaction parameters between the NPs and the ILs are given in Table in the Supporting Information file.