Phase behavior of a de-ionized binary mixture of charged spheres in the presence of gravity

Publication type:
Journal article
Metadata:
Autoren
  • Nina J Lorenz
  • Hans Joachim Schoepe
  • Thomas Palberg
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000270825500025&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1063/1.3225339
eISSN
1089-7690
Externe Identifier
  • Clarivate Analytics Document Solution ID: 507BR
  • PubMed Identifier: 19814560
ISSN
0021-9606
Ausgabe der Veröffentlichung
13
Zeitschrift
JOURNAL OF CHEMICAL PHYSICS
Artikelnummer
ARTN 134501
Datum der Veröffentlichung
2009
Status
Published
Titel
Phase behavior of a de-ionized binary mixture of charged spheres in the presence of gravity
Sub types
  • Article
Ausgabe der Zeitschrift
131

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>We report on the phase behavior of an aqueous binary charged sphere suspension under exhaustively de-ionized conditions as a function of number fraction of small particles p and total number density n. The mixture of size ratio Γ=0.557 displays a complex phase diagram. Formation of bcc crystals with no compositional order dominates. We observe a region of drastically decreased crystal stability at 0.55&amp;lt;p&amp;lt;0.95 with the minimum located at p=0.8±0.05 at densities above n=26 μm−3. A peaked region of enhanced stability is observed at p=0.4. Further light scattering experiments were conducted to characterize the crystallization time scales, the density profiles, and the composition of formed phases. For 0.82&amp;gt;p&amp;gt;0.95 crystal formation is partially assisted by gravity, i.e., gravitational separation of the two species precedes crystal formation for samples in the coexistence range. In the composition range corresponding to the decreased crystal stability only lower bounds of the freezing and melting line are obtained, but the general shape of the phase diagram is retained. At p=0.93 and n=43 μm−3 two different crystalline phases coexist in the bulk, while at p=0.4 additional Bragg peaks appear in the static light scattering experiments. This strongly suggests that we observe an eutectic in the region of decreased stability, while the enhanced stability at p=0.4 seems to correlate with compound formation.</jats:p>
Autoren
  • Nina J Lorenz
  • Hans Joachim Schöpe
  • Thomas Palberg
DOI
10.1063/1.3225339
eISSN
1089-7690
ISSN
0021-9606
Ausgabe der Veröffentlichung
13
Zeitschrift
The Journal of Chemical Physics
Sprache
en
Online publication date
2009
Datum der Veröffentlichung
2009
Status
Published
Herausgeber
AIP Publishing
Herausgeber URL
http://dx.doi.org/10.1063/1.3225339
Datum der Datenerfassung
2023
Titel
Phase behavior of a de-ionized binary mixture of charged spheres in the presence of gravity
Ausgabe der Zeitschrift
131

Data source: Crossref

Abstract
We report on the phase behavior of an aqueous binary charged sphere suspension under exhaustively de-ionized conditions as a function of number fraction of small particles p and total number density n. The mixture of size ratio Gamma=0.557 displays a complex phase diagram. Formation of bcc crystals with no compositional order dominates. We observe a region of drastically decreased crystal stability at 0.55<p<0.95 with the minimum located at p=0.8+/-0.05 at densities above n=26 microm(-3). A peaked region of enhanced stability is observed at p=0.4. Further light scattering experiments were conducted to characterize the crystallization time scales, the density profiles, and the composition of formed phases. For 0.82>p>0.95 crystal formation is partially assisted by gravity, i.e., gravitational separation of the two species precedes crystal formation for samples in the coexistence range. In the composition range corresponding to the decreased crystal stability only lower bounds of the freezing and melting line are obtained, but the general shape of the phase diagram is retained. At p=0.93 and n=43 microm(-3) two different crystalline phases coexist in the bulk, while at p=0.4 additional Bragg peaks appear in the static light scattering experiments. This strongly suggests that we observe an eutectic in the region of decreased stability, while the enhanced stability at p=0.4 seems to correlate with compound formation.
Addresses
  • Institut für Physik, Johannes Gutenberg Universität Mainz, Staudinger Weg 7, D-55128 Mainz, Germany. lorenzn@uni-mainz.de
Autoren
  • Nina J Lorenz
  • Hans Joachim Schöpe
  • Thomas Palberg
DOI
10.1063/1.3225339
eISSN
1089-7690
Externe Identifier
  • PubMed Identifier: 19814560
Open access
false
ISSN
0021-9606
Ausgabe der Veröffentlichung
13
Zeitschrift
The Journal of chemical physics
Sprache
eng
Medium
Print
Paginierung
134501
Datum der Veröffentlichung
2009
Status
Published
Datum der Datenerfassung
2009
Titel
Phase behavior of a de-ionized binary mixture of charged spheres in the presence of gravity.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
131

Data source: Europe PubMed Central

Abstract
We report on the phase behavior of an aqueous binary charged sphere suspension under exhaustively de-ionized conditions as a function of number fraction of small particles p and total number density n. The mixture of size ratio Gamma=0.557 displays a complex phase diagram. Formation of bcc crystals with no compositional order dominates. We observe a region of drastically decreased crystal stability at 0.55<p<0.95 with the minimum located at p=0.8+/-0.05 at densities above n=26 microm(-3). A peaked region of enhanced stability is observed at p=0.4. Further light scattering experiments were conducted to characterize the crystallization time scales, the density profiles, and the composition of formed phases. For 0.82>p>0.95 crystal formation is partially assisted by gravity, i.e., gravitational separation of the two species precedes crystal formation for samples in the coexistence range. In the composition range corresponding to the decreased crystal stability only lower bounds of the freezing and melting line are obtained, but the general shape of the phase diagram is retained. At p=0.93 and n=43 microm(-3) two different crystalline phases coexist in the bulk, while at p=0.4 additional Bragg peaks appear in the static light scattering experiments. This strongly suggests that we observe an eutectic in the region of decreased stability, while the enhanced stability at p=0.4 seems to correlate with compound formation.
Autoren
  • Nina J Lorenz
  • Hans Joachim Schöpe
  • Thomas Palberg
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/19814560
DOI
10.1063/1.3225339
eISSN
1089-7690
Ausgabe der Veröffentlichung
13
Zeitschrift
J Chem Phys
Sprache
eng
Country
United States
Paginierung
134501
Datum der Veröffentlichung
2009
Status
Published
Datum, an dem der Datensatz öffentlich gemacht wurde
2009
Titel
Phase behavior of a de-ionized binary mixture of charged spheres in the presence of gravity.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
131

Data source: PubMed

Abstract
We report on the phase behavior of an aqueous binary charged sphere suspension under exhaustively deionized conditions as a function of number fraction of small particles p and total number density n. The mixture of size ratio 0.557 displays a complex phase diagram. Formation of bcc crystals with no compositional order dominates. We observe a region of drastically decreased crystal stability at 0.55 < p < 0.95 with the minimum located at p = 0.8 +/- 0.05 at densities above n = 26um-3. A peaked region of enhanced stability is observed at p = 0.4. Further light scattering experiments were conducted to characterize the crystallization time scales, the density profiles and the composition of formed phases. For 0.82 > p > 0.95 crystal formation is partially assisted by gravity, i.e. gravitational separation of the two species precedes crystal formation samples in the coexistence range. In the composition range corresponding to the decreased crystal stability only lower bounds of the freezing and melting line are obtained, but the general shape of the phase diagram is retained. At p = 0.93 and n = 43um-3 two different crystalline phases coexist in the bulk, while at p = 0.4 additional Bragg peaks appear in the static light scattering experiments. This strongly suggests that we observe a eutectic in the region of decreased stability, while the enhanced stability at p = 0.4 seems to correlate with compound formation.
Autoren
  • Nina J Lorenz
  • Hans Joachim Schoepe
  • Thomas Palberg
Autoren-URL
http://arxiv.org/abs/0905.0326v1
Zeitschrift
J. CHEM. PHYS.
Schlüsselwörter
  • cond-mat.soft
  • cond-mat.soft
  • cond-mat.other
Notes
34 pages, 10 figures, 1 table
Paginierung
134501
Datum der Veröffentlichung
2009
Herausgeber URL
http://dx.doi.org/10.1063/1.3225339
Datum der Datenerfassung
2009
Datum, an dem der Datensatz öffentlich gemacht wurde
2009
Titel
Phase behavior of a deionized binary mixture of charged spheres in the presence of gravity
Ausgabe der Zeitschrift
131

Files

0905.0326v1.pdf

Data source: arXiv

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