Anisotropic particles with tetrahedral symmetry
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]
File:Fig5-eps-converted-to.pdf 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
See also
References
- ↑ Flavio Romano, Eduardo Sanz and Francesco Sciortino "Role of the Range in the Fluid−Crystal Coexistence for a Patchy Particle Model", Journal of Physical Chemistry B 113 pp. 15133–15136 (2009)
- ↑ Flavio Romano, Eduardo Sanz and Francesco Sciortino "Phase diagram of a tetrahedral patchy particle model for different interaction ranges", Journal of Chemical Physics 132 184501 (2010)
- ↑ Flavio Romano, Eduardo Sanz, and Francesco Sciortino "Crystallization of tetrahedral patchy particles in silico", Journal of Chemical Physics 134, 174502 (2011)
- ↑ Zhenli Zhang, Aaron S. Keys, Ting Chen, and Sharon C. Glotzer "Self-Assembly of Patchy Particles into Diamond Structures through Molecular Mimicry", Langmuir 21, 11547 (2005)
- ↑ Eva G. Noya, Carlos Vega, Jonathan P. K. Doye, and Ard A. Louis "The stability of a crystal with diamond structure for patchy particles with tetrahedral symmetry", Journal of Chemical Physics 132 234511 (2010)
- ↑ N. G. Almarza and E. G. Noya "Phase transitions of a lattice model for patchy particles with tetrahedral symmetry", Molecular Physics 109 pp. 65-74 (2011)
- Related reading