Crystallization in a sheared colloidal suspension

Abstract

We study numerically the crystallization process in a supersaturated suspension of repulsive colloidal particles driven by simple shear flow. The effect of the shear flow on crystallization is two-fold: while it suppresses the initial nucleation, once a large enough critical nucleus has formed its growth is enhanced by the shear flow. Combining both effects implies an optimal strain rate at which the overall crystallization rate has a maximum. To gain insight into the underlying mechanisms, we employ a discrete state model describing the transitions between the local structural configurations around single particles. We observe a time-scale separation between these transitions and the overall progress of the crystallization allowing for an effective Markovian description. By using this model, we demonstrate that the suppression of nucleation is due to the inhibition of a pre-structured liquid.

Autoren

Boris Lander
Udo Seifert
Thomas Speck

DOI

10.1063/1.4808354

eISSN

1089-7690

ISSN

0021-9606

Ausgabe der Veröffentlichung

22

Zeitschrift

The Journal of Chemical Physics

Sprache

en

Online publication date

2013

Datum der Veröffentlichung

2013

Status

Published

Herausgeber

AIP Publishing

Herausgeber URL

http://dx.doi.org/10.1063/1.4808354

Datum der Datenerfassung

2023

Titel

Crystallization in a sheared colloidal suspension

Ausgabe der Zeitschrift

138

Datenquelle: Crossref

Abstract

We study numerically the crystallization process in a supersaturated suspension of repulsive colloidal particles driven by simple shear flow. The effect of the shear flow on crystallization is two-fold: while it suppresses the initial nucleation, once a large enough critical nucleus has formed its growth is enhanced by the shear flow. Combining both effects implies an optimal strain rate at which the overall crystallization rate has a maximum. To gain insight into the underlying mechanisms, we employ a discrete state model describing the transitions between the local structural configurations around single particles. We observe a time-scale separation between these transitions and the overall progress of the crystallization allowing for an effective Markovian description. By using this model, we demonstrate that the suppression of nucleation is due to the inhibition of a pre-structured liquid.

Addresses

II. Institut für Theoretische Physik, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.

Autoren

Boris Lander
Udo Seifert
Thomas Speck

DOI

10.1063/1.4808354

eISSN

1089-7690

Externe Identifier

PubMed Identifier: 23781821

Open access

false

ISSN

0021-9606

Ausgabe der Veröffentlichung

22

Zeitschrift

The Journal of chemical physics

Sprache

eng

Medium

Print

Paginierung

224907

Datum der Veröffentlichung

2013

Status

Published

Datum der Datenerfassung

2013

Titel

Crystallization in a sheared colloidal suspension.

Sub types

Journal Article

Ausgabe der Zeitschrift

138

Datenquelle: Europe PubMed Central

Abstract

We study numerically the crystallization process in a supersaturated suspension of repulsive colloidal particles driven by simple shear flow. The effect of the shear flow on crystallization is two-fold: while it suppresses the initial nucleation, once a large enough critical nucleus has formed its growth is enhanced by the shear flow. Combining both effects implies an optimal strain rate at which the overall crystallization rate has a maximum. To gain insight into the underlying mechanisms, we employ a discrete state model describing the transitions between the local structural configurations around single particles. We observe a time-scale separation between these transitions and the overall progress of the crystallization allowing for an effective Markovian description. By using this model, we demonstrate that the suppression of nucleation is due to the inhibition of a pre-structured liquid.

Autoren

Boris Lander
Udo Seifert
Thomas Speck

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/23781821

DOI

10.1063/1.4808354

eISSN

1089-7690

Ausgabe der Veröffentlichung

22

Zeitschrift

J Chem Phys

Sprache

eng

Country

United States

Paginierung

224907

Datum der Veröffentlichung

2013

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2014

Titel

Crystallization in a sheared colloidal suspension.

Sub types

Journal Article

Ausgabe der Zeitschrift

138

Datenquelle: PubMed

Abstract

We study numerically the crystallization process in a supersaturated suspension of repulsive colloidal particles driven by simple shear flow. The effect of the shear flow on crystallization is two-fold: while it suppresses the initial nucleation, once a large enough critical nucleus has formed its growth is enhanced by the shear flow. Combining both effects implies an optimal strain rate at which the overall crystallization rate has a maximum. To gain insight into the underlying mechanisms, we employ a discrete state model describing the transitions between the local structural configurations around single particles. We observe a time-scale separation between these transitions and the overall progress of the crystallization allowing for an effective Markovian description. By using this model, we demonstrate that the suppression of nucleation is due to the inhibition of a pre-structured liquid.

Autoren

Boris Lander
Udo Seifert
Thomas Speck

Autoren-URL

http://arxiv.org/abs/1303.4773v1

Zeitschrift

J. Chem. Phys.

Schlüsselwörter

cond-mat.soft
cond-mat.soft
cond-mat.stat-mech

Paginierung

224907

Datum der Veröffentlichung

2013

Herausgeber URL

http://dx.doi.org/10.1063/1.4808354

Datum der Datenerfassung

2013

Datum, an dem der Datensatz öffentlich gemacht wurde

2013

Titel

Crystallization in a sheared colloidal suspension

Ausgabe der Zeitschrift

138

Files

1303.4773v1.pdf

Datenquelle: arXiv

Crystallization in a sheared colloidal suspension

Files

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