From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering

Abstract

Hard sphere suspensions are well recognized model systems of statistical physics and soft condensed matter. We here investigate the temporal evolution of the immediate environment of nucleating and growing crystals and/or their global scale distribution using time resolved Small Angle Light Scattering (SALS). Simultaneously performed Bragg scattering measurements provide an accurate temporal gauging of the sequence of events. We apply this approach to studies of re-crystallization in several different shear molten hard sphere and attractive hard sphere samples with the focus being on the diversity of observable signal shapes and their change in time. We demonstrate that depending on the preparation conditions different processes occur on length scales larger than the structural scale, which significantly influence both the crystallization kinetics and the final micro-structure. By careful analysis of the SALS signal evolution and by comparing different suggestions for small angle signal shapes to our data, we can for most cases identify the processes leading to the observed signals. These include form factor scattering from crystals surrounded by depletion zones and structure factor scattering from late stage inter-crystallite ordering. The large variety of different small angle signals thus in principle contains valuable information complementary to that gained from Bragg scattering or microscopy. Our comparison, however, also shows that further refinement and adaptation of the theoretical expressions to the sample specific boundary conditions is desired for a quantitative kinetic analysis of micro-structural evolution.

Autoren

Richard Beyer
Markus Franke
Hans Joachim Schöpe
Eckhard Bartsch
Thomas Palberg

DOI

10.1063/1.4928370

eISSN

1089-7690

ISSN

0021-9606

Ausgabe der Veröffentlichung

6

Zeitschrift

The Journal of Chemical Physics

Sprache

en

Online publication date

2015

Datum der Veröffentlichung

2015

Status

Published

Herausgeber

AIP Publishing

Herausgeber URL

http://dx.doi.org/10.1063/1.4928370

Datum der Datenerfassung

2023

Titel

From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering

Ausgabe der Zeitschrift

143

Datenquelle: Crossref

Abstract

Hard sphere suspensions are well recognized model systems of statistical physics and soft condensed matter. We here investigate the temporal evolution of the immediate environment of nucleating and growing crystals and/or their global scale distribution using time resolved Small Angle Light Scattering (SALS). Simultaneously performed Bragg scattering measurements provide an accurate temporal gauging of the sequence of events. We apply this approach to studies of re-crystallization in several different shear molten hard sphere and attractive hard sphere samples with the focus being on the diversity of observable signal shapes and their change in time. We demonstrate that depending on the preparation conditions different processes occur on length scales larger than the structural scale, which significantly influence both the crystallization kinetics and the final micro-structure. By careful analysis of the SALS signal evolution and by comparing different suggestions for small angle signal shapes to our data, we can for most cases identify the processes leading to the observed signals. These include form factor scattering from crystals surrounded by depletion zones and structure factor scattering from late stage inter-crystallite ordering. The large variety of different small angle signals thus in principle contains valuable information complementary to that gained from Bragg scattering or microscopy. Our comparison, however, also shows that further refinement and adaptation of the theoretical expressions to the sample specific boundary conditions is desired for a quantitative kinetic analysis of micro-structural evolution.

Addresses

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

Autoren

Richard Beyer
Markus Franke
Hans Joachim Schöpe
Eckhard Bartsch
Thomas Palberg

DOI

10.1063/1.4928370

eISSN

1089-7690

Externe Identifier

PubMed Identifier: 26277162

Funding acknowledgements

Deutsche Forschungsgemeinschaft: Pa459/13, 16 & 17
Deutsche Forschungsgemeinschaft: Scho1054/3
EU MCRT-Network: CT-2003-504 712

Open access

false

ISSN

0021-9606

Ausgabe der Veröffentlichung

6

Zeitschrift

The Journal of chemical physics

Sprache

eng

Medium

Print

Paginierung

064903

Datum der Veröffentlichung

2015

Status

Published

Datum der Datenerfassung

2015

Titel

From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering.

Sub types

Journal Article

Ausgabe der Zeitschrift

143

Datenquelle: Europe PubMed Central

Abstract

Hard sphere suspensions are well recognized model systems of statistical physics and soft condensed matter. We here investigate the temporal evolution of the immediate environment of nucleating and growing crystals and/or their global scale distribution using time resolved Small Angle Light Scattering (SALS). Simultaneously performed Bragg scattering measurements provide an accurate temporal gauging of the sequence of events. We apply this approach to studies of re-crystallization in several different shear molten hard sphere and attractive hard sphere samples with the focus being on the diversity of observable signal shapes and their change in time. We demonstrate that depending on the preparation conditions different processes occur on length scales larger than the structural scale, which significantly influence both the crystallization kinetics and the final micro-structure. By careful analysis of the SALS signal evolution and by comparing different suggestions for small angle signal shapes to our data, we can for most cases identify the processes leading to the observed signals. These include form factor scattering from crystals surrounded by depletion zones and structure factor scattering from late stage inter-crystallite ordering. The large variety of different small angle signals thus in principle contains valuable information complementary to that gained from Bragg scattering or microscopy. Our comparison, however, also shows that further refinement and adaptation of the theoretical expressions to the sample specific boundary conditions is desired for a quantitative kinetic analysis of micro-structural evolution.

Autoren

Richard Beyer
Markus Franke
Hans Joachim Schöpe
Eckhard Bartsch
Thomas Palberg

Autoren-URL

https://www.ncbi.nlm.nih.gov/pubmed/26277162

DOI

10.1063/1.4928370

eISSN

1089-7690

Ausgabe der Veröffentlichung

6

Zeitschrift

J Chem Phys

Sprache

eng

Country

United States

Paginierung

064903

Datum der Veröffentlichung

2015

Status

Published

Datum, an dem der Datensatz öffentlich gemacht wurde

2015

Titel

From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering.

Sub types

Journal Article

Ausgabe der Zeitschrift

143

Datenquelle: PubMed

Abstract

Hard sphere suspensions are well recognized model systems of statistical physics and soft condensed matter. We here investigate the temporal evolution of the immediate environment of nucleating and growing crystals and/or their global scale distribution using time resolved Small Angle Light Scattering (SALS). Simultaneously performed Bragg scattering (BS) measurements provide an accurate temporal gauging of the sequence of events. We apply this approach to studies of re-crystallization in several different shear molten hard sphere and attractive hard sphere samples with the focus being on the diversity of observable signal shapes and their change in time. We demonstrate that depending on the preparation conditions different processes occur on length scales larger than the structural scale which significantly influence both the crystallization kinetics and the final micro-structure. By careful analysis of the SALS signal evolution and by comparing different suggestions for small angle signal shapes to our data we can for most cases identify the processes leading to the observed signals. These include phase contrast form factor scattering from depletion zones during formation and overlap as well as during gelation, amplitude contrast form factor scattering by more transparent crystals, and structure factor scattering from late stage inter-crystallite ordering. The large variety of different small angle signals thus in principle contains valuable information complementary to that gained from Bragg scattering or microscopy. Our comparison, however, also shows that further refinement and adaptation of the theoretical expressions to the sample specific boundary conditions is desired for a quantitative kinetic analysis of micro-structural evolution.

Autoren

Richard Beyer
Markus Franke
Hans Joachim Schöpe
Eckhard Bartsch
Thomas Palberg

Autoren-URL

http://arxiv.org/abs/1403.5895v3

Schlüsselwörter

cond-mat.soft
cond-mat.soft

Datum der Veröffentlichung

2014

Herausgeber URL

http://dx.doi.org/10.1063/1.4928370

Datum der Datenerfassung

2014

Datum, an dem der Datensatz öffentlich gemacht wurde

2014

Titel

From Nuclei to Micro-Structure in Colloidal Crystallization: Investigating Intermediate Length Scales by Small Angle Laser Light Scattering

Files

1403.5895v3.pdf

Datenquelle: arXiv

Autoren

Richard Beyer
Markus Franke
Hans Joachim Schöpe
Eckhard Bartsch
Thomas Palberg

DOI

10.1063/1.4928370

ISSN

0021-9606

Zeitschrift

The Journal of Chemical Physics

Artikelnummer

6

Paginierung

064903 - 064903

Datum der Veröffentlichung

2015

Datum der Datenerfassung

2020

Titel

From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering

Sub types

article

Ausgabe der Zeitschrift

143

Datenquelle: Manual

From nuclei to micro-structure in colloidal crystallization: Investigating intermediate length scales by small angle laser light scattering

Files

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