X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF

X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF

The phase behavior of acidic samples of EDL-MF based on cobalt ferrite nanoparticles with controlled mean sizes was investigated at constant temperature and in absence of magnetic field. By monitoring the nanoparticle charge by pH adjustments, we constructed an experimental pH-dependent phase diagram for all samples that revealed sol, gel thixotropic or coagulated phases in different pH regions. Then, by using an extended DLVO potential we analyzed quantitatively the observed phase diagram in function of pH and nanoparticle mean size.

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Main Authors: Campos,A. F. C., Marinho,E. P., Ferreira,M. de A., Tourinho,F. A., Paula,F. L. de O., Depeyrot,J.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Física 2009
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332009000200018
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spelling oai:scielo:S0103-973320090002000182009-07-03X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MFCampos,A. F. C.Marinho,E. P.Ferreira,M. de A.Tourinho,F. A.Paula,F. L. de O.Depeyrot,J. EDL-MF surface charge density phase diagrams The phase behavior of acidic samples of EDL-MF based on cobalt ferrite nanoparticles with controlled mean sizes was investigated at constant temperature and in absence of magnetic field. By monitoring the nanoparticle charge by pH adjustments, we constructed an experimental pH-dependent phase diagram for all samples that revealed sol, gel thixotropic or coagulated phases in different pH regions. Then, by using an extended DLVO potential we analyzed quantitatively the observed phase diagram in function of pH and nanoparticle mean size.info:eu-repo/semantics/openAccessSociedade Brasileira de FísicaBrazilian Journal of Physics v.39 n.1a 20092009-04-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332009000200018en10.1590/S0103-97332009000200018
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author Campos,A. F. C.
Marinho,E. P.
Ferreira,M. de A.
Tourinho,F. A.
Paula,F. L. de O.
Depeyrot,J.
spellingShingle Campos,A. F. C.
Marinho,E. P.
Ferreira,M. de A.
Tourinho,F. A.
Paula,F. L. de O.
Depeyrot,J.
X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
author_facet Campos,A. F. C.
Marinho,E. P.
Ferreira,M. de A.
Tourinho,F. A.
Paula,F. L. de O.
Depeyrot,J.
author_sort Campos,A. F. C.
title X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
title_short X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
title_full X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
title_fullStr X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
title_full_unstemmed X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
title_sort x-dlvo interactions between nanocolloidal magnetic particles: the quantitative interpretation of the ph-dependent phase diagram of edl-mf
description The phase behavior of acidic samples of EDL-MF based on cobalt ferrite nanoparticles with controlled mean sizes was investigated at constant temperature and in absence of magnetic field. By monitoring the nanoparticle charge by pH adjustments, we constructed an experimental pH-dependent phase diagram for all samples that revealed sol, gel thixotropic or coagulated phases in different pH regions. Then, by using an extended DLVO potential we analyzed quantitatively the observed phase diagram in function of pH and nanoparticle mean size.
publisher Sociedade Brasileira de Física
publishDate 2009
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332009000200018
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