Complete description of re-entrant phase behaviour in a charge variable colloidal model system

Abstract

In titration experiments with NaOH, we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Zeff and the concentration of screening electrolyte c using microscopy, light and ultrasmall angle x-ray scattering (USAXS). For sufficiently large n, the system crystallizes upon increasing Zeff at constant c and melts upon increasing c at only slightly altered Zeff. In contrast to earlier work, equilibrium phase boundaries are consistent with a universal melting line prediction from computer simulation, if the elasticity effective charge is used. This charge accounts for both counterion condensation and many-body effects.

Autoren

Patrick Wette
Ina Klassen
Dirk Holland-Moritz
Dieter M Herlach
Hans Joachim Schöpe
Nina Lorenz
Holger Reiber
Thomas Palberg
Stephan V Roth

DOI

10.1063/1.3380823

eISSN

1089-7690

ISSN

0021-9606

Ausgabe der Veröffentlichung

13

Zeitschrift

The Journal of Chemical Physics

Sprache

en

Online publication date

2010

Datum der Veröffentlichung

2010

Status

Published

Herausgeber

AIP Publishing

Herausgeber URL

http://dx.doi.org/10.1063/1.3380823

Datum der Datenerfassung

2023

Titel

Communications: Complete description of re-entrant phase behavior in a charge variable colloidal model system

Ausgabe der Zeitschrift

132

Data source: Crossref

Abstract

In titration experiments with NaOH, we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Z(eff) and the concentration of screening electrolyte c using microscopy, light and ultrasmall angle x-ray scattering (USAXS). For sufficiently large n, the system crystallizes upon increasing Z(eff) at constant c and melts upon increasing c at only slightly altered Z(eff). In contrast to earlier work, equilibrium phase boundaries are consistent with a universal melting line prediction from computer simulation, if the elasticity effective charge is used. This charge accounts for both counterion condensation and many-body effects.

Addresses

Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany. patrick.wette@dlr.de

Autoren

Patrick Wette
Ina Klassen
Dirk Holland-Moritz
Dieter M Herlach
Hans Joachim Schöpe
Nina Lorenz
Holger Reiber
Thomas Palberg
Stephan V Roth

DOI

10.1063/1.3380823

eISSN

1089-7690

Externe Identifier

PubMed Identifier: 20387914

Open access

false

ISSN

0021-9606

Ausgabe der Veröffentlichung

13

Zeitschrift

The Journal of chemical physics

Sprache

eng

Medium

Print

Paginierung

131102

Datum der Veröffentlichung

2010

Status

Published

Datum der Datenerfassung

2010

Titel

Communications: Complete description of re-entrant phase behavior in a charge variable colloidal model system.

Sub types

Journal Article

Ausgabe der Zeitschrift

132

Data source: Europe PubMed Central

Abstract

In titration experiments with NaOH, we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Z(eff) and the concentration of screening electrolyte c using microscopy, light and ultrasmall angle x-ray scattering (USAXS). For sufficiently large n, the system crystallizes upon increasing Z(eff) at constant c and melts upon increasing c at only slightly altered Z(eff). In contrast to earlier work, equilibrium phase boundaries are consistent with a universal melting line prediction from computer simulation, if the elasticity effective charge is used. This charge accounts for both counterion condensation and many-body effects.

Autoren

Patrick Wette
Ina Klassen
Dirk Holland-Moritz
Dieter M Herlach
Hans Joachim Schöpe
Nina Lorenz
Holger Reiber
Thomas Palberg
Stephan V Roth

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/20387914

DOI

10.1063/1.3380823

eISSN

1089-7690

Ausgabe der Veröffentlichung

13

Zeitschrift

J Chem Phys

Sprache

eng

Country

United States

Paginierung

131102

Datum der Veröffentlichung

2010

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2010

Titel

Communications: Complete description of re-entrant phase behavior in a charge variable colloidal model system.

Sub types

Journal Article

Ausgabe der Zeitschrift

132

Data source: PubMed

Abstract

In titration experiments with NaOH we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Zeff and the concentration of screening electrolyte c using microscopy, light and Ultra Small Angle X-Ray Scattering (USAXS). For sufficiently large n the system crystallizes upon increasing Zeff at constant c and melts upon increasing c at only slightly altered Zeff. In contrast to earlier work equilibrium phase boundaries are consistent with a universal melting line prediction from computer simulation, if the elasticity effective charge is used. This charge accounts for both counter-ion condensation and many body effects.

Autoren

Patrick Wette
Ina Klassen
Dirk Holland-Moritz
Dieter M Herlach
Hans Joachim Schoepe
Nina Lorenz
Holger Reiber
Thomas Palberg
Stephan V Roth

Autoren-URL

http://arxiv.org/abs/0912.0398v1

Zeitschrift

THE JOURNAL OF CHEMICAL PHYSICS

Schlüsselwörter

cond-mat.soft
cond-mat.soft

Notes

10 pages, 3Figures

Paginierung

131102

Datum der Veröffentlichung

2009

Herausgeber URL

http://dx.doi.org/10.1063/1.3380823

Datum der Datenerfassung

2009

Datum, an dem der Datensatz öffentlich gemacht wurde

2009

Titel

Complete description of re-entrant phase behaviour in a charge variable colloidal model system

Ausgabe der Zeitschrift

132

Files

0912.0398v1.pdf

Data source: arXiv

Abstract

In titration experiments with NaOH we have determined the full phase diagram of charged colloidal spheres in dependence on the particle density n, the particle effective charge Zeff and the concentration of screening electrolyte c using microscopy, light and Ultra Small Angle X-Ray Scattering (USAXS). For sufficiently large n the system crystallizes upon increasing Zeff at constant c and melts upon increasing c at only slightly altered Zeff. In contrast to earlier work equilibrium phase boundaries are consistent with a universal melting line prediction from computer simulation, if the elasticity effective charge is used. This charge accounts for both counter-ion condensation and many body effects.

Autoren

Patrick Wette
Ina Klassen
Dirk Holland-Moritz
Dieter M Herlach
Hans Joachim Schoepe
Nina Lorenz
Holger Reiber
Thomas Palberg
Stephan V Roth

DOI

10.1063/1.3380823

ISSN

0021-9606

Zeitschrift

The Journal of Chemical Physics

Notes

keywords: Physics - Soft Condensed Matter file: https://arxiv.org/pdf/0912.0398v1.pdf file: https://arxiv.org/pdf/0912.0398v1.pdf

Artikelnummer

13

Paginierung

131102 - 131102

Datum der Veröffentlichung

2010

Herausgeber URL

http://arxiv.org/pdf/0912.0398v1

Datum der Datenerfassung

2020

Titel

Complete description of re-entrant phase behaviour in a charge variable colloidal model system

Sub types

article

Ausgabe der Zeitschrift

132

Data source: Manual

Complete description of re-entrant phase behaviour in a charge variable colloidal model system

Files

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