Predicting patterns for molecular self-organization on surfaces using interaction-site models

Details Predicting patterns for molecular self-organization on surfaces using interaction-site models Predicting patterns for molecular self-organization on surfaces using interaction-site models

2011-02-17

arxiv.org/abs/1102.3575v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 Pages, 7 Figures

Scientific paper

Molecular building blocks interacting at the nanoscale organize spontaneously into stable mono- layers that display intriguing long-range ordering motifs on the surface of atomic substrates. The patterning process, if appropriately controlled, represents a viable route to manufacture practical nanodevices. With this goal in mind, we seek to capture the salient features of the self-assembly process by means of an interaction-site model. The geometry of the building blocks, the symmetry of the underlying substrate, and the strength and range of interactions encode the self-assembly pro- cess. By means of Monte Carlo simulations, we have predicted an ample variety of ordering motifs which nicely reproduce the experimental results. Here, we explore in detail the phase behavior of the system in terms of the temperature and the lattice constant of the underlying substrate. Our method is suitable to investigate the stability of the emergent patterns as well as to identify the nature of the melting transition monitoring appropriate order parameters.

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