Noncentral forces in crystals of charged colloids

D. Reinke; H. Stark; H.-H. von Gruenberg; Andrew B. Schofield; G. Maret; U. Gasser

doi:10.1103/PhysRevLett.98.038301

Noncentral forces in crystals of charged colloids

D. Reinke, H. Stark, H.-H. von Gruenberg, Andrew B. Schofield, G. Maret, U. Gasser

School of Physics and Astronomy

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

Abstract

The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties.

Original language	English
Article number	038301
Pages (from-to)	-
Number of pages	4
Journal	Physical Review Letters
Volume	98
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.98.038301
Publication status	Published - 19 Jan 2007

Keywords / Materials (for Non-textual outputs)

SUSPENSIONS
DYNAMICS

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10.1103/PhysRevLett.98.038301

Edinburgh Soft Matter and Statistical Physics Group: Programme Grant
Cates, M., Ackland, G., Egelhaaf, S., Evans, M., Poon, W. & Pusey, P.
EPSRC
1/10/03 → 31/03/08
Project: Research

Cite this

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title = "Noncentral forces in crystals of charged colloids",

abstract = "The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties.",

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AU - Reinke, D.

AU - Stark, H.

AU - von Gruenberg, H.-H.

AU - Schofield, Andrew B.

AU - Maret, G.

AU - Gasser, U.

PY - 2007/1/19

Y1 - 2007/1/19

N2 - The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties.

AB - The elastic properties of fcc crystals consisting of charge stabilized colloidal particles are determined from real space imaging experiments using confocal microscopy. The normal modes and the force constants of the crystal are obtained from the fluctuations of the particles around their lattice sites using the equipartition theorem. We show that the Cauchy relation is not fulfilled and that only noncentral many-body forces can account for the elastic properties.

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KW - DYNAMICS

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JF - Physical Review Letters

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Noncentral forces in crystals of charged colloids

Abstract

Keywords / Materials (for Non-textual outputs)

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Projects

Edinburgh Soft Matter and Statistical Physics Group: Programme Grant

Cite this