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Chemicals, plastics and rubber industries

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Magnetic behavior of gama-Fe2O3 nanocrystals dispersed in colloidal silica particles

Article Abstract:

An attempt is made to study the magnetic properties of composites that consisted of gama-Fe2O3 nanocrystals (4-10 nm) dispersed in submicrometer spherical silica particles at different packing fractions. It is found that interparticle interactions cause frustation of the moments, and determined a dependence of the effective anisotropy with the particle size probably associated with the existence of surface anisotropy.

Author: Tartaj, Pedro, Gonzalez-Carreno, Teresita, Serna, Carlos J.
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2003
All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Industrial sand, Silica & Silica Sand, Industrial Sand Mining, Crystals, Silica, Magnetic properties, Silicon dioxide, Hematite

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Critical coagulation of Langmuir monolayers: 2D Schulze-Hardy Rule

Article Abstract:

The Schulze-Hardy rule, a well-known relation on colloidal dispersions between the critical coagulation concentration (ccc) and ionic valency of added electrolytes, is observed to hold in monolayer systems. It is observed that a carboxyazobenzene derivative with a relatively short alkyl chain forms only a kinetically stable monolayer at the air-water interface without developing measurable surface pressure.

Author: Sano, Masahito, Kamino, Ayumi, Shinkai, Seiji
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
Science & research, Research, Monomolecular films, Coagulation

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Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS quantum dots synthesized from ZnO

Article Abstract:

Colloidal ZnSe quantum dots have been synthesized from ZnO in a lauric acid/hexadecylamine mixture. X-ray diffraction patterns indicated that the ZnSe quantum dots possess a wurtzite structure.

Author: Hsueh-Shih Chen, Bertrand Lo, Jen-Yu Hwang, Gwo-Yang Chang, Shian-Jy Jassy Wang, Chien-Ming Chen, Shih-JungTasi
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2004
Usage, X-ray diffraction, Properties, Zinc compounds

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Subjects list: Analysis, Colloids
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