Overview of the phase diagram of ionic magnetic colloidal dispersions
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Física
2001
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| _version_ | 1876425685541584896 |
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| author | F. Cousin |
| author_facet | F. Cousin |
| contents | Overview of the phase diagram of ionic magnetic colloidal dispersions F. Cousin E. Dubois V. Cabuil F. Boué R. Perzynski Física, Astronomía y Matemáticas We study ionic magnetic colloidal dispersions, which are constituted of gamma-Fe2O3 nanoparticles dispersed in water, and stabilized with electrostatic interparticle repulsion. The phase diagram piV versus phi (pi: osmotic pressure, V: particle volume, phi: particle volume fraction) is explored, especially in the range of high pi and high phi. The osmotic pressure pi of the colloidal dispersion is known either by a measurement either because it is imposed during the sample preparation by osmotic compression. The structure of the colloidal dispersion is determined from Small Angle Neutron Scattering (SANS). Two regimes can be distinguished. At high pressure, fluid and solid phases can exist. Their structure is governed by strong electrostatic repulsion, the range of which is here evaluated. At low pressure, gas, liquid and glassy solids can exist. Their structure results from a sticky hard sphere potential. 2001 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413502003 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3 Vol.31 |
| format | Artículo científico |
| id | redalyc_46413502003 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Overview of the phase diagram of ionic magnetic colloidal dispersions F. Cousin Física, Astronomía y Matemáticas Overview of the phase diagram of ionic magnetic colloidal dispersions F. Cousin E. Dubois V. Cabuil F. Boué R. Perzynski Física, Astronomía y Matemáticas We study ionic magnetic colloidal dispersions, which are constituted of gamma-Fe2O3 nanoparticles dispersed in water, and stabilized with electrostatic interparticle repulsion. The phase diagram piV versus phi (pi: osmotic pressure, V: particle volume, phi: particle volume fraction) is explored, especially in the range of high pi and high phi. The osmotic pressure pi of the colloidal dispersion is known either by a measurement either because it is imposed during the sample preparation by osmotic compression. The structure of the colloidal dispersion is determined from Small Angle Neutron Scattering (SANS). Two regimes can be distinguished. At high pressure, fluid and solid phases can exist. Their structure is governed by strong electrostatic repulsion, the range of which is here evaluated. At low pressure, gas, liquid and glassy solids can exist. Their structure results from a sticky hard sphere potential. 2001 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413502003 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3 Vol.31 |
| title | Overview of the phase diagram of ionic magnetic colloidal dispersions |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46413502003 |