Low-density crystals in charged colloids: Comparison with Yukawa theory

I. Rios de Anda; A. Statt; F. Turci; C. P. Royall

doi:10.1002/ctpp.201400099

Low-density crystals in charged colloids: Comparison with Yukawa theory

I. Rios de Anda, A. Statt, F. Turci, C. P. Royall

Research output: Contribution to journal › Article › peer-review

Abstract

Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle-resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction ϕ ≈ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.

Original language	English (US)
Pages (from-to)	172-179
Number of pages	8
Journal	Contributions to Plasma Physics
Volume	55
Issue number	2-3
DOIs	https://doi.org/10.1002/ctpp.201400099
State	Published - Feb 1 2015
Externally published	Yes

Keywords

Colloids
Yukawa model

ASJC Scopus subject areas

Condensed Matter Physics

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10.1002/ctpp.201400099

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abstract = "Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle-resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction ϕ ≈ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.",

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AU - Turci, F.

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N2 - Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle-resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction ϕ ≈ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.

AB - Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle-resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction ϕ ≈ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.

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Low-density crystals in charged colloids: Comparison with Yukawa theory

Abstract

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