Re-entrant disordering of colloidal molecular crystals on two-dimensional periodic substrates

  title={Re-entrant disordering of colloidal molecular crystals on two-dimensional periodic substrates},
  author={Michael C. Mikulis and C. J. O. Reichhardt and C. J. O. Reichhardt and Richard T. Scalettar and Gergely T. Zim{\'a}nyi},
  journal={Journal of Physics: Condensed Matter},
Using numerical simulations, we study colloidal ordering and disordering on two-dimensional periodic substrates where the number of colloids per substrate minima is two or three. The colloids form dimer or trimer states with orientational ordering, referred to as colloidal molecular crystals. At a fixed temperature such that, in the absence of a substrate, the colloids are in a triangular floating solid state, upon increasing the substrate strength we find a transition to an ordered colloidal… 
11 Citations
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