FIG. 8: (Colour online) Space-time plots are given for (left) the film thickness h and (right) the nanoparticle layer height h$_{p}$ = hφ . The plot corresponds to the complete evolution resulting in the ring profile of Fig. 6(b). In both panels bright [dark] parts denote high [low] regions. The prominent central dark-bright border in the left panel indicates the change of the position of the contact line in time. Over time, four regimes can be distinguished: (i) fast motion before pinning, (ii) nearly no front motion during self-pinning, (iii) slow motion after depinning, and (iv) final evaporation from the center. should also be investigated further in the simple case presented here. We have discussed recent work on pattern formation processes in films and drops of evaporating suspensions/solutions of polymers and particles. After reviewing experiments on suspensions of thiol-coated gold nanoparticles in toluene we have focused on the modelling of the transport and phase change processes involved. A theoretical approach to the modelling of the hydrodynamics on the mesoscale has been described as well as more microscopic models for the dynamics in the observed nanoscopic ‘postcursor’ film. In particular, we have introduced (i) a microscopic kinetic Monte Carlo model, (ii) a dynamical density functional theory and (iii) a hydrodynamic thin film model. The kinetic Monte Carlo model and the dynamical density functional theory can both be used to investigate and understand the formation of polygonal networks, spinodal and branched structures resulting from the dewetting of an ultrathin ‘postcursor’ film that remains behind the mesoscopic dewetting front. They are, however, not capable of describing the dynamical processes in a meso- 23 IV. CONCLUSION (iii) (iv) (ii) (i)