Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres

Autoren

Thomas Palberg
Patrick Wette
Dieter M Herlach

Autoren-URL

https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000369438600001&DestLinkType=FullRecord&DestApp=WOS_CPL

DOI

10.1103/PhysRevE.93.022601

eISSN

2470-0053

Externe Identifier

Clarivate Analytics Document Solution ID: DC7ZB
PubMed Identifier: 26986371

ISSN

2470-0045

Ausgabe der Veröffentlichung

2

Zeitschrift

PHYSICAL REVIEW E

Artikelnummer

ARTN 022601

Datum der Veröffentlichung

2016

Status

Published

Titel

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres

Sub types

Article

Ausgabe der Zeitschrift

93

Datenquelle: Web of Science (Lite)

Autoren

Thomas Palberg
Patrick Wette
Dieter M Herlach

DOI

10.1103/physreve.93.022601

eISSN

2470-0053

ISSN

2470-0045

Ausgabe der Veröffentlichung

2

Zeitschrift

Physical Review E

Sprache

en

Artikelnummer

022601

Online publication date

2016

Status

Published online

Herausgeber

American Physical Society (APS)

Herausgeber URL

http://dx.doi.org/10.1103/physreve.93.022601

Datum der Datenerfassung

2022

Titel

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres

Ausgabe der Zeitschrift

93

Datenquelle: Crossref

Abstract

The interfacial free energy is a central quantity in crystallization from the metastable melt. In suspensions of charged colloidal spheres, nucleation and growth kinetics can be accurately measured from optical experiments. In previous work, from these data effective nonequilibrium values for the interfacial free energy between the emerging bcc nuclei and the adjacent melt in dependence on the chemical potential difference between melt phase and crystal phase were derived using classical nucleation theory (CNT). A strictly linear increase of the interfacial free energy was observed as a function of increased metastability. Here, we further analyze these data for five aqueous suspensions of charged spheres and one binary mixture. We utilize a simple extrapolation scheme and interpret our findings in view of Turnbull's empirical rule. This enables us to present the first systematic experimental estimates for a reduced interfacial free energy, σ(0,bcc), between the bcc-crystal phase and the coexisting equilibrium fluid. Values obtained for σ(0,bcc) are on the order of a few k(B)T. Their values are not correlated to any of the electrostatic interaction parameters but rather show a systematic decrease with increasing size polydispersity and a lower value for the mixture as compared to the pure components. At the same time, σ(0) also shows an approximately linear correlation to the entropy of freezing. The equilibrium interfacial free energy of strictly monodisperse charged spheres may therefore be still greater.

Addresses

Institut für Physik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany.

Autoren

Thomas Palberg
Patrick Wette
Dieter M Herlach

DOI

10.1103/physreve.93.022601

eISSN

2470-0053

Externe Identifier

PubMed Identifier: 26986371

Funding acknowledgements

Deutsche Forschungsgemeinschaft: Pa459/16
Deutsche Forschungsgemeinschaft: He1601/24
Deutsche Forschungsgemeinschaft: Pa459/17

Open access

false

ISSN

2470-0045

Ausgabe der Veröffentlichung

2

Zeitschrift

Physical review. E

Sprache

eng

Medium

Print-Electronic

Online publication date

2016

Paginierung

022601

Datum der Veröffentlichung

2016

Status

Published

Datum der Datenerfassung

2016

Titel

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres.

Sub types

Journal Article

Ausgabe der Zeitschrift

93

Datenquelle: Europe PubMed Central

Abstract

The interfacial free energy is a central quantity in crystallization from the metastable melt. In suspensions of charged colloidal spheres, nucleation and growth kinetics can be accurately measured from optical experiments. In previous work, from these data effective nonequilibrium values for the interfacial free energy between the emerging bcc nuclei and the adjacent melt in dependence on the chemical potential difference between melt phase and crystal phase were derived using classical nucleation theory (CNT). A strictly linear increase of the interfacial free energy was observed as a function of increased metastability. Here, we further analyze these data for five aqueous suspensions of charged spheres and one binary mixture. We utilize a simple extrapolation scheme and interpret our findings in view of Turnbull's empirical rule. This enables us to present the first systematic experimental estimates for a reduced interfacial free energy, σ(0,bcc), between the bcc-crystal phase and the coexisting equilibrium fluid. Values obtained for σ(0,bcc) are on the order of a few k(B)T. Their values are not correlated to any of the electrostatic interaction parameters but rather show a systematic decrease with increasing size polydispersity and a lower value for the mixture as compared to the pure components. At the same time, σ(0) also shows an approximately linear correlation to the entropy of freezing. The equilibrium interfacial free energy of strictly monodisperse charged spheres may therefore be still greater.

Autoren

Thomas Palberg
Patrick Wette
Dieter M Herlach

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/26986371

DOI

10.1103/PhysRevE.93.022601

eISSN

2470-0053

Ausgabe der Veröffentlichung

2

Zeitschrift

Phys Rev E

Sprache

eng

Country

United States

Paginierung

022601

Datum der Veröffentlichung

2016

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2016

Titel

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres.

Sub types

Journal Article

Ausgabe der Zeitschrift

93

Datenquelle: PubMed

Abstract

The interfacial free energy is a central quantity in crystallization from the meta-stable melt. In suspensions of charged colloidal spheres, nucleation and growth kinetics can be accurately measured from optical experiments. In previous work, from this data effective non-equilibrium values for the interfacial free energy between the emerging bcc-nuclei and the adjacent melt in dependence on the chemical potential difference between melt phase and crystal phase were derived using classical nucleation theory. A strictly linear increase of the interfacial free energy was observed as a function of increased meta-stability. Here, we further analyze this data for five aqueous suspensions of charged spheres and one binary mixture. We utilize a simple extrapolation scheme and interpret our findings in view of Turnbull's empirical rule. Our first estimates for the reduced interfacial free energy, $\sigma_{0,bcc}$, between coexisting equilibrium uid and bcc-crystal phases are on the order of a few $k_BT$. Their values are not correlated to any of the electrostatic interaction parameters but rather show a systematic decrease with increasing size polydispersity and a lower value for the mixture as compared to the pure components. At the same time, $\sigma_0$ also shows an approximately linear correlation to the entropy of freezing. The equilibrium interfacial free energy of strictly monodisperse charged spheres may therefore be still greater.

Autoren

Thomas Palberg
Patrick Wette
Dieter M Herlach

Autoren-URL

http://arxiv.org/abs/1511.04746v2

Schlüsselwörter

cond-mat.soft
cond-mat.soft
cond-mat.mtrl-sci
cond-mat.stat-mech

Notes

main paper 11 pages, 4 appendices, 13 figures, 2 tables, revised version submitted to PRE, 2nd Revision

Datum der Veröffentlichung

2015

Herausgeber URL

http://dx.doi.org/10.1103/PhysRevE.93.022601

Datum der Datenerfassung

2015

Datum, an dem der Datensatz öffentlich gemacht wurde

2015

Titel

Equilibrium Fluid-Crystal Interfacial Free Energy of Bcc-Crystallizing Aqueous Suspensions of Polydisperse Charged Spheres

Files

1511.04746v2.pdf

Datenquelle: arXiv

Equilibrium fluid-crystal interfacial free energy of bcc-crystallizing aqueous suspensions of polydisperse charged spheres

Files

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