Crystallization And Reentrant Melting Of Charged Colloids In Nonpolar Solvents

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

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Article number030301
Number of pages5
JournalPhysical Review E
Volume91
DOIs
Publication statusPublished - 23 Mar 2015

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