Stability of Dispersions of Colloidal Hematite/Yttrium Oxide Core-Shell Particles
نویسندگان
چکیده
منابع مشابه
Stability of dispersions of colloidal hematite/yttrium oxide core-shell particles.
The colloidal stability of suspensions of hematite/yttria core/shell particles is investigated in this work and compared with that of the pure hematite cores. The different electrical surface characteristics of yttrium and iron oxides, as well as the diameters of both types of spherical particles, dominate the overall process of particle aggregation. The aggregation kinetics of the suspensions ...
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Spherical and quite monodisperse particles (average diameter 60 ( 7 nm) of hematite (R-Fe2O3) were synthesized and then covered with a shell of yttrium oxide of variable thickness. A surface thermodynamic study was carried out for these core/shell colloidal particles, using two experimental techniques: contact angle measurements of selected liquids on glass slides uniformly covered by the mater...
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We report on the fabrication and optical transmission studies of thin three-dimensional photonic crystals of high-dielectric ZnS-core and low-dielectric SiO2-shell colloidal particles. These samples were fabricated using a vertical controlled drying method. The spectral position and width of a stopgap depend on the core-to-shell ratio, in a manner consistent with numerical calculations. Both ex...
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ژورنال
عنوان ژورنال: Journal of Colloid and Interface Science
سال: 2002
ISSN: 0021-9797
DOI: 10.1006/jcis.2002.8459