Results 251 to 260 of about 2,720,118 (298)

Low-Frequency Complex Magnetic Susceptibility of Magnetic Composite Microspheres in Colloidal Dispersion [PDF]

Journal of Magnetism and Magnetic Materials, 2007
Abstract A procedure is presented to determine the permanent magnetic dipole moment of composite microspheres containing magnetic nanoparticles with a blocked magnetic dipole moment. The composite particles are dispersed in a solvent, and the complex magnetic susceptibility is measured from 0.1 to 1000 Hz using a highly sensitive new setup. Composite
Ben H Erne, Bonny W M Kuipers, Stefano Sacanna   +2 more
exaly   +4 more sources

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Hydrodynamics of Magnetic and Dielectric Colloidal Dispersions

Journal of Chemical Physics, 1986
We discuss the hydrodynamic behavior of colloidal suspensions, the particles of which possess electric or magnetic moments. Particular attention is given to the case where an external electric or magnetic field acts on a system in which the polarization does not relax instantaneously, so that reorientational Brownian motion is coupled to both the field
Peter J. Stiles, J B Hubbard
exaly   +2 more sources

Limits of magnetic flocculation in colloidal dispersions

IEEE Transactions on Magnetics, 1983
The limits of particle aggregation in high magnetic fields are described. These limits are determined, for any given colloid-field system, by electrochemical factors and by particle size. The latter is discussed in terms of thermal diffusion processes at the lower size limit and by the influence of differential gravitational settling in larger particle
R. van Kleef, H. Myron, P. Wyder, D. Fletcher, J. Glew, M. Rowley, M. Parker   +6 more
openaire   +1 more source

The Structure, Magnetic Characterization, and Oxidation of Colloidal Iron Dispersions

Journal of Applied Physics, 1979
Colloidal iron dispersions have been prepared by the thermolysis of Fe(CO)5 in solutions of functional polymers. The structure of the particles was very disordered at sizes ≲100 Å but changed to become single crystal with a disordered core as the size increased to 100–200 Å.
C. H. Griffiths, M. P. O’Horo, T. W. Smith   +2 more
exaly   +2 more sources

Kinetics of magnetic flocculation in colloidal dispersions

Journal of Colloid and Interface Science, 1984
Abstract A description is given of the kinetics of particle agglomeration in colloidal dispersions in applied magnetic fields, a phenomenon referred to as magnetic flocculation. The influence of monosize particles and dissimilar particle sizes on the position and field value for secondary flocculation minima is re-examined.
M.R Parker, R.P.A.R Van Kleef, H.W Myron, P Wydert   +3 more
openaire   +1 more source

Rotational diffusion of magnetic nickel nanorods in colloidal dispersions

Journal of Physics: Condensed Matter, 2011
Colloidal dispersions of Ni nanorods were synthesized by pulsed electrodeposition of Ni into nanoporous aluminum oxide layers followed by dissolution of the templates. Geometrical characterization of the nanorods by transmission electron microscopy and scanning electron microscopy allowed us to determine the average length (100-250 nm) and diameter (20-
Günther, Annegret, Bender, Philipp, Tschöpe, Andreas, Birringer, Rainer   +3 more
openaire   +3 more sources

Transportation, dispersion and ordering of dense colloidal assemblies by magnetic interfacial rotaphoresis

Lab on a Chip, 2015
We reveal a method to transport, disperse and order dense assemblies of magnetically responsive colloids on a surface within seconds and with velocities of mm s −1 .
Reenen, van, A., Jong, de, A.M., Prins, M.W.J.   +2 more
openaire   +3 more sources

Optimizing colloidal dispersity of magnetic nanoparticles based on magnetic separation with magnetic nanowires array

Applied Physics A, 2014
Based on sharp geometry of Ni nanowires, we developed a novel high-gradient magnetic separator that was composed of a nanowires array and a uniform magnetic field. When suspension of magnetic nanoparticles (MNPs) flowed through it, the relatively large nanoparticles or clusters were removed from the suspension so that the size distribution can be ...
Jianfei Sun, Miaomiao He, Xuan Liu, Ning Gu   +3 more
openaire   +1 more source

A Molecular Dynamic Model of the Magnetic Properties and Microstructure of Strongly Interacting Colloidal Dispersions

IEEE Transactions on Magnetics, 1998
A molecular dynamic model of the properties of a strongly interacting particulate dispersion is described. The particles concerned are assumed to be acicular and the model is applied to the study of the properties of a dispersion of advanced metal particles for recording media.
R W Chantrell, A Satoh
exaly   +2 more sources

Two-Dimensional Monte Carlo Simulations of a Colloidal Dispersion Composed of Rod-Like Ferromagnetic Particles in the Absence of an Applied Magnetic Field

Journal of Colloid and Interface Science, 2006
Influences of the magnetic interaction between particles and the aspect ratio of particles on aggregate structures in a colloidal dispersion composed of rod-like ferromagnetic particles were investigated by means of the cluster-moving Monte Carlo method.
Akira Satoh
exaly   +3 more sources