NMR-Characterization of Magnetic Fluids
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A. Langer
Summary
31P-NMR spectra have been measured on aqueous solutions and gels of phosphorylated polyvinyl alcohol in absence and in presence of dispersed magnetic nanoparticles. In this system, the rotational diffusion is still rapid enough for a sufficient averaging of the CSA tensor of the 31P nucleus. At the same time, the lateral diffusion of the 31P nuclei is significantly reduced. Under these circumstances, it is possible to detect the spatial distribution of the local field by 31P-NMR. The obtained line shape exhibits the characteristic shark fin pattern which has been predicted on a theoretical basis. This basically supports the proposed dependence of the NMR line shape on the velocity of lateral diffusion which allows for detailed analysis of lateral motion.
© by Oldenbourg Wissenschaftsverlag, München
Artikel in diesem Heft
- Preface. 88th International Bunsen Discussion Meeting – 6th German Ferrofluid Workshop: “Magnetic Colloidal Fluids: Preparation, Characterization, Physical Properties and Applications”
- Air-stable Co-, Fe-, and Fe/Co-Nanoparticles and Ferrofluids
- Magnetic Polymer Brushes: Towards Tailor-Made Stabilization of Magnetic Fluids by Surface-Initiated Polymerization
- Precipitated Iron Oxide Particles by Cyclic Growth
- Production and Characterisation of Ferromagnetic Nanoscale Metal Powders Produced by Laser Evaporation
- Dependence of Brownian Relaxation on the Volume Fraction and an External Field
- NMR-Characterization of Magnetic Fluids
- Periodically Forced Ferrofluid Pendulum: Effect of Polydispersity
- Surface Waves and Rosensweig Instability in Isotropic Ferrogels
- Polydispersity Influence upon Magnetic Properties of Aggregated Ferrofluids
- Magnetic Fluid Layer on a Cylinder in a Traveling Magnetic Field
- The Carboxymethyl Dextran Shell is an Important Modulator of Magnetic Nanoparticle Uptake in Human Cells
- A Successful Strategy for the Production of Cationic Magnetoliposomes
Artikel in diesem Heft
- Preface. 88th International Bunsen Discussion Meeting – 6th German Ferrofluid Workshop: “Magnetic Colloidal Fluids: Preparation, Characterization, Physical Properties and Applications”
- Air-stable Co-, Fe-, and Fe/Co-Nanoparticles and Ferrofluids
- Magnetic Polymer Brushes: Towards Tailor-Made Stabilization of Magnetic Fluids by Surface-Initiated Polymerization
- Precipitated Iron Oxide Particles by Cyclic Growth
- Production and Characterisation of Ferromagnetic Nanoscale Metal Powders Produced by Laser Evaporation
- Dependence of Brownian Relaxation on the Volume Fraction and an External Field
- NMR-Characterization of Magnetic Fluids
- Periodically Forced Ferrofluid Pendulum: Effect of Polydispersity
- Surface Waves and Rosensweig Instability in Isotropic Ferrogels
- Polydispersity Influence upon Magnetic Properties of Aggregated Ferrofluids
- Magnetic Fluid Layer on a Cylinder in a Traveling Magnetic Field
- The Carboxymethyl Dextran Shell is an Important Modulator of Magnetic Nanoparticle Uptake in Human Cells
- A Successful Strategy for the Production of Cationic Magnetoliposomes
