Stability of Colloidal Quasicrystals

Details Stability of Colloidal Quasicrystals Stability of Colloidal Quasicrystals

1998-03-06

arxiv.org/abs/cond-mat/9803078v1

Phys. Rev. Lett. 81, 469 (1998)

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.81.469

Freezing of charge-stabilized colloidal suspensions and relative stabilities of crystals and quasicrystals are studied using thermodynamic perturbation theory. Macroion interactions are modelled by effective pair potentials combining electrostatic repulsion with polymer-depletion or van der Waals attraction. Comparing free energies -- counterion terms included -- for elementary crystals and rational approximants to icosahedral quasicrystals, parameters are identified for which one-component quasicrystals are stabilized by a compromise between packing entropy and cohesive energy.

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