Characterization of colloidal hematite particle shape and dispersion behavior

An elliptically polarized light scattering (EPLS) technique for the size and shape characterization of ellipsoidal hematite particles is presented. The hematite particles are synthesized by aging aqueous FeCl 3 or Fe(NO 3) 3 solutions at 100 °C. Different reaction conditions create particles of aspe...

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Veröffentlicht in:	Journal of colloid and interface science 2004-12, Vol.280 (2), p.417-430
Hauptverfasser:	Manickavasagam, S., Saltiel, C., Giesche, Herbert
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry Colloidal state and disperse state Exact sciences and technology Fractal General and physical chemistry Hematite Light scattering Physical and chemical studies. Granulometry. Electrokinetic phenomena Shape characterization
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	An elliptically polarized light scattering (EPLS) technique for the size and shape characterization of ellipsoidal hematite particles is presented. The hematite particles are synthesized by aging aqueous FeCl 3 or Fe(NO 3) 3 solutions at 100 °C. Different reaction conditions create particles of aspect ratios between 1 (spherical) and 8 (elongated). Cross-sectional diameter and aspect ratio are observed as a function of reaction (aging) time. Growth of the elongated particles, as well as their fractal aggregation behavior, is characterized using EPLS and comparisons are made with photon correlation spectroscopy and TEM measurements.
ISSN:	0021-9797 1095-7103
DOI:	10.1016/j.jcis.2004.08.031