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Ferrofluids
Items for "Ferrofluids"
Magnetic Polymer Brushes: Towards Tailor-Made Stabilization of Magnetic Fluids by Surface-Initiated Polymerization
Novel surfactant-free magnetic fluids based on magnetite nanoparticles stabilized by a covalently attached polymeric brush were characterized in terms of their dispersion properties by DLS...
Keywords: Core-Shell Particles, Dynamic Light Scattering, Nanohybrid Materials, Ferrofluids
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagProduction and Characterisation of Ferromagnetic Nanoscale Metal Powders Produced by Laser Evaporation
Ferromagnetic metallic nanoscale particles were produced by laser evaporation of Co, Fe and Fe3Al targets with vapour condensation in nitrogen, argon or air...
Keywords: Laser Evaporation, Nanoparticles, Saturation Magnetisation, Ferrofluids, Co
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagNMR-Characterization of Magnetic Fluids
31P-NMR spectra have been measured on aqueous solutions and gels of phosphorylated polyvinyl alcohol in absence and in presence of dispersed magnetic nanoparticles...
Keywords: NMR, Magnetic Particles, Lateral Diffusion, Ferrofluids, Magnetic Stray Field
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagPolydispersity Influence upon Magnetic Properties of Aggregated Ferrofluids
In the present paper we compare the static magnetic properties of a bidisperse ferrofluid obtained via computer simulations with the predictions of the theoretical chain model...
Keywords: Ferrofluids, Static Magnetic Properties, Polydispersity
01/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagCharacterization of the Grain Size in Ferromagnetic Colloids: Comparing Torsional-Pendulum Measurements with Standard Complementary Methods
A recently introduced shear-flow-free method for measuring the rotational viscosity of a resonantly forced torsional pendulum is used to determine the transverse magnetic relaxation time in magnetite and cobalt-based ferrofluids...
Keywords: Ferrofluids, Particle Size Analysis, Relaxation Time
02/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagStructural and Magnetic Properties of Ni/NiOxide- and Co/CoOxide Core/Shell Nanoparticles and their possible Use for Ferrofluids
Ni- and Co-nanoparticles of average sizes of about 4 to 10 nm were produced by “physical” means with the cluster source LUCAS based upon laser evaporation into seeding gas and adiabatic expansion into an UHV experimentation chamber...
Keywords: Nanoparticles, Ferrofluids, Magnetic Properties, Oxide Nanoparticles, Core/Shell Nanoparticles
02/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagThermal Ratchet Effect in a Rotating Ferrofluid
Rotational Brownian motion of a colloidal magnetic particle in a ferrofluid under the influence of an external magnetic field may give rise to a noise induced rotation of the particle due to the rectification of thermal fluctuations...
Keywords: Thermal Ratchet, Ferrofluids, Brownian Motors
02/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag