Anisotropic particles with tetrahedral symmetry: Difference between revisions

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Tetrahedral Kern-Frenkel patchy particles crystallise spontaneously into open tetrahedral networks for narrow patches (solid angle < 30). The interaction range does not play an important role in crystallisation <ref>[http://dx.doi.org/10.1063/1.3578182 Flavio Romano, Eduardo Sanz, and Francesco Sciortino "Crystallization of tetrahedral patchy particles in silico", Journal of Chemical Physics 134, 174502 (2011)]</ref>
Tetrahedral Kern-Frenkel patchy particles crystallise spontaneously into open tetrahedral networks for narrow patches (solid angle < 30). The interaction range does not play an important role in crystallisation <ref>[http://dx.doi.org/10.1063/1.3578182 Flavio Romano, Eduardo Sanz, and Francesco Sciortino "Crystallization of tetrahedral patchy particles in silico", Journal of Chemical Physics 134, 174502 (2011)]</ref>


[[Image:fig5-eps-converted-to.pdf]]
[[Image:fig5.jpg]]
Interaction range, <math>\delta</math>, versus patch angular width.  
Interaction range, <math>\delta</math>, versus patch angular width.  
Diamonds correspond to crystallising and circles to glass–forming models.  
Diamonds correspond to crystallising and circles to glass–forming models.  

Revision as of 15:36, 8 August 2011

Artists impression of a tetrahedral patchy particle

Kern and Frenkel model

Phase diagram

The phase diagram of the tetrahedral Kern and Frenkel patchy model exhibits the following solid phases[1][2]: diamond crystal (DC), body centred cubic (BCC) and face centred cubic (FCC). The gas-liquid critical point becomes metastable with respect to the diamond crystal when the range of the interaction becomes short (roughly less than 15% of the diameter).

In contrast to isotropic models, the critical point becomes only weakly metastable with respect to the solid as the interaction range narrows (from left to right in the figure).

Crystallization

Tetrahedral Kern-Frenkel patchy particles crystallise spontaneously into open tetrahedral networks for narrow patches (solid angle < 30). The interaction range does not play an important role in crystallisation [3]

Interaction range, , versus patch angular width. Diamonds correspond to crystallising and circles to glass–forming models. The point studied in Ref. [4] is included.

Modulated patchy Lennard-Jones model

The solid phases of the modulated patchy Lennard-Jones model has also been studied [5]

Lattice model

[6]

See also

References

Related reading