Results 261 to 270 of about 2,720,118 (298)

Size and quality dispersion of a single preparation of colloidal magnetic particles

Journal of Magnetism and Magnetic Materials, 1989
Abstract Using a variety of techniques (including electron microscopy, neutron and X-ray scattering and magnetization measurements) we have characterized fractions of a single preparation of water-based magnetic colloid. The fractions, produced by column chromatography, not only vary in size, as expected, but also in quality as indicated by a reduced
Anthony C. Nunes, Zhong-Chen Yu
openaire   +1 more source

Two-Dimensional Monte Carlo Simulations of a Colloidal Dispersion Composed of Polydisperse Ferromagnetic Particles in an Applied Magnetic Field

Journal of Colloid and Interface Science, 2005
We have investigated aggregation phenomena in a polydisperse colloidal dispersion of ferromagnetic particles simulated by employing the cluster-moving Monte Carlo method in an applied magnetic field. The influence of both particle-particle and particle-field interactions on the aggregate structures is analyzed in terms of a pair correlation function ...
Akira Satoh
exaly   +3 more sources

Application of the dissipative particle dynamics method to magnetic colloidal dispersions

Molecular Physics, 2006
The validity of the application of the dissipative particle dynamics (DPD) method to ferromagnetic colloidal dispersions has been investigated by conducting DPD simulations for a two–dimensional system. First, the interaction between dissipative and magnetic particles has been idealized as some model potentials, and DPD simulations have been carried ...
Akira Satoh, Roy W. Chantrell
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Change in Electric Conductivity With Magnetic Field of Colloidal Spindle-Type Hematite Dispersions

Journal of Colloid and Interface Science, 1989
Abstract It is shown that the conductivity of dispersions of spindle-type colloidal hematite particles changes with the strength of the superimposed magnetic field. The effect is observed both with a perpendicular and with a parallel field relative to the direction of the conductivity measurement and its magnitude depends on the particle size and ...
Egon Matijevic, Masataka Ozaki
exaly   +2 more sources

Two-Dimensional Monte Carlo Simulations of a Polydisperse Colloidal Dispersion Composed of Ferromagnetic Particles for the Case of No External Magnetic Field

Journal of Colloid and Interface Science, 2004
We have investigated the aggregation phenomena in a polydisperse colloidal dispersion composed of ferromagnetic particles by means of the cluster-moving Monte Carlo method. The results have been compared with those for a monodisperse system. The internal structures of aggregates have been analyzed in terms of the radial distribution function in order ...
Akira Satoh
exaly   +3 more sources

Measurement of magnetically induced linear optical birefringence and dichroism in colloidal dispersions

Journal of Physics E: Scientific Instruments, 1977
Linear birefringence and linear dichroism are a result of preferential orientation of non-spherical molecules or colloidal particles in liquids or dispersions. A novel apparatus is described for measuring simultaneously the birefringence and dichroism induced in liquids or colloidal dispersions by a magnetic field.
J V Champion, D Downer, G H Meeten, L F Gate   +3 more
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Magnetic-field-dependent optical transmission of nickel nanorod colloidal dispersions

Journal of Applied Physics, 2009
Aqueous dispersions of nickel nanorods, ≈13 nm in diameter and 40–160 nm in length, were synthesized using ac electrodeposition into porous alumina templates. The nanorods in suspension can be aligned by modest magnetic fields, which leads to a change in the optical transmittance of the dispersion.
Klein, Tobias, Laptev, Aleksej, Günther, Annegret, Bender, Philipp, Tschöpe, Andreas, Birringer, Rainer   +5 more
openaire   +2 more sources

A general and mild route to highly dispersible anisotropic magnetic colloids for sensing weak magnetic fields

Journal of Materials Chemistry C, 2018
A porous-silica-protected conversion method is developed to prepare highly dispersible anisotropic magnetic colloids.
Shumin Zhang, Chaoran Li, Yingying Yu, Zhijie Zhu, Weihu Zhang, Rujun Tang, Wei Sun, Wenhe Xie, Yunxing Li, Jia Yu, Le He, Xiaohong Zhang   +11 more
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High-Throughput Transformation of Colloidal Polymer Spheres to Discs Simply via Magnetic Stirring of Their Dispersions

Langmuir, 2012
In this article, we have successfully demonstrated the high-throughput production of colloidal discs via magnetic stirring of aqueous dispersions of monodisperse, sulfate-stabilized polystyrene (PS) spheres in the presence of a good organic solvent.
Liu, B., Wang, D.
openaire   +3 more sources

A Simple and Effective Quantification of Water‐Soluble Rhodium in Soil Samples by Magnetic‐Colloidal‐Gel‐Assisted Dispersive Solid Phase Extraction

ChemistrySelect, 2023
Abstract In this study, a simple, sensitive and environmentally friendly method was developed for the determination of water‐soluble rhodium in soil samples. For this purpose, rhodium was preconcentrated/separated by a dispersive solid phase extraction method (dSPE) and determined by an atomic absorption ...
Buket Cesur, Nihan Atsever, Buse Tuğba Zaman, Sezgin Bakırdere   +3 more
openaire   +2 more sources