Crystallization and reentrant melting of charged colloids in nonpolar solvents

Toshimitsu Kanai; Niels Boon; Peter J. Lu; Eli Sloutskin; Andrew B. Schofield; Frank Smallenburg; René Van Roij; Marjolein Dijkstra; David A. Weitz

doi:10.1103/PhysRevE.91.030301

Crystallization and reentrant melting of charged colloids in nonpolar solvents

Toshimitsu Kanai, Niels Boon, Peter J. Lu, Eli Sloutskin, Andrew B. Schofield, Frank Smallenburg, René Van Roij, Marjolein Dijkstra, David A. Weitz

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

33 Scopus citations

Abstract

We explore the crystallization of charged colloidal particles in a nonpolar solvent mixture. We simultaneously charge the particles and add counterions to the solution with aerosol-OT (AOT) reverse micelles. At low AOT concentrations, the charged particles crystallize into body-centered-cubic (bcc) or face-centered-cubic (fcc) Wigner crystals; at high AOT concentrations, the increased screening drives a thus far unobserved reentrant melting transition. We observe an unexpected scaling of the data with particle size, and account for all behavior with a model that quantitatively predicts both the reentrant melting and the data collapse.

Original language	English
Article number	030301
Journal	Physical Review E
Volume	91
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevE.91.030301
State	Published - 23 Mar 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 American Physical Society.

Funding

Funders	Funder number
National Aeronautics and Space Administration	NNX13AQ48G
National Science Foundation	DMR-1206765, DMR-1310266
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
National Science Foundation
Directorate for Mathematical and Physical Sciences	1310266, 1420570, 1206765

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10.1103/PhysRevE.91.030301

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abstract = "We explore the crystallization of charged colloidal particles in a nonpolar solvent mixture. We simultaneously charge the particles and add counterions to the solution with aerosol-OT (AOT) reverse micelles. At low AOT concentrations, the charged particles crystallize into body-centered-cubic (bcc) or face-centered-cubic (fcc) Wigner crystals; at high AOT concentrations, the increased screening drives a thus far unobserved reentrant melting transition. We observe an unexpected scaling of the data with particle size, and account for all behavior with a model that quantitatively predicts both the reentrant melting and the data collapse.",

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AU - Kanai, Toshimitsu

AU - Boon, Niels

AU - Lu, Peter J.

AU - Sloutskin, Eli

AU - Schofield, Andrew B.

AU - Smallenburg, Frank

AU - Van Roij, René

AU - Dijkstra, Marjolein

AU - Weitz, David A.

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Crystallization and reentrant melting of charged colloids in nonpolar solvents

Abstract

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