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Density-induced reentrant melting of colloidal Wigner crystals.

Everts, J C; Boon, Niels LU and van Roij, R (2016) In Physical chemistry chemical physics : PCCP
Abstract
Electrostatic repulsions can drive crystallization in many-particle systems. For charged colloidal systems, the phase boundaries as well as crystal structure are highly tunable by experimental parameters such as salt concentration and pH. By using projections of the colloid-ion mixture to a system of (soft) repulsive spheres and the one-component plasma (OCP), we study the hitherto unexplained experimentally observed reentrant melting of electrostatically repelling colloids upon increasing the colloid density. Our study shows that the surface chemistry should involve a competition between adsorption of cations and anions to explain the observed density-induced reentrant melting.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical chemistry chemical physics : PCCP
publisher
Royal Society of Chemistry
external identifiers
  • pmid:26814798
  • scopus:84958225335
  • wos:000370421500018
ISSN
1463-9084
DOI
10.1039/c5cp07943h
language
English
LU publication?
yes
id
9ad83ac8-ab38-4b2c-bd46-b729db7d20f9 (old id 8573546)
date added to LUP
2016-02-10 14:31:16
date last changed
2017-01-01 05:28:21
@article{9ad83ac8-ab38-4b2c-bd46-b729db7d20f9,
  abstract     = {Electrostatic repulsions can drive crystallization in many-particle systems. For charged colloidal systems, the phase boundaries as well as crystal structure are highly tunable by experimental parameters such as salt concentration and pH. By using projections of the colloid-ion mixture to a system of (soft) repulsive spheres and the one-component plasma (OCP), we study the hitherto unexplained experimentally observed reentrant melting of electrostatically repelling colloids upon increasing the colloid density. Our study shows that the surface chemistry should involve a competition between adsorption of cations and anions to explain the observed density-induced reentrant melting.},
  author       = {Everts, J C and Boon, Niels and van Roij, R},
  issn         = {1463-9084},
  language     = {eng},
  month        = {01},
  publisher    = {Royal Society of Chemistry},
  series       = {Physical chemistry chemical physics : PCCP},
  title        = {Density-induced reentrant melting of colloidal Wigner crystals.},
  url          = {http://dx.doi.org/10.1039/c5cp07943h},
  year         = {2016},
}