Figure 2. From top to bottom; schematization of the interfacial system whose dynamics is investigated in this work (elements not to scale).

We characterized its microscopic dynamics as a function of surface concentration; we discriminate between different dynamical regimes: from the simple Brownian diffusion and Ballistic motion to Collective Rearrangements, similar to what is found e.g. in traffic jams. The outcome of this study might impact on technological applications such as colloidosomes, capsules, foams and emulsions. Moreover, it might lead to a better understanding of the effect of nanoparticles on lung surfactants and cell membranes in general.