text: short- and long-range interactions of solvent and/or solute with the substrate. We have, however, 
  
  restricted the examples given here to situations that can also be described using the KMC model. 
  
  A further exploration will be presented elsewhere. 
  
  Finally, we have discussed a simple thin ﬁlm model for the hydrodynamics on the mesoscale. It 
  
  results from a long-wave approximation and consists of coupled evolution equations for the ﬁlm 
  
  thickness proﬁle and the mean particle concentration. It has been used to discuss the self-pinning 
  
  of receding contact lines that is related to the formation of rings of dried-in particles (coffee- 
  
  stain effect) that frequently occurs when ﬁlms or drops of solutions or suspensions dewet by the 
  
  combined effects of convection and evaporation. 
  
  One of the primary goals of researchers in this ﬁeld, is the search for simple-to-use techniques 
  
  that allow one to produce hierarchically structured functional layers for a wide range of applica- 
  
  tions such as, e.g., organic solar cells [98]. This means that the experiments advance very rapidly 
  
  towards increasingly complex systems. For example, there have been investigations of the inﬂu- 