Single Step Hybrid Coating Process to Enhance the Electrosteric Stabilization of Inorganic Particles

Amino covalent binding approach on iron oxide nanoparticle surface: Toward biological applications

“…Particle stability, hydrodynamic radius and the electrophoretic mobility were determined as a function of pH for the three different IONPs with a particle concentration of 0.02 g/L at 25°C (Figure 4). As shown in previous works 35 , the isoelectric point of bare hematite NPs, on the basis of zeta potential measurements, is between 7 and 8. At pH values above or below pH 7 and 8, respectively, the particles are stabilized by electrostatic repulsions.…”

Anisotropic magnetic particles in a magnetic field

“…There is, however, still only a limited, albeit growing number of experimental reports on well defined model systems of ellipsoids available in the literature. 13–20 This is partly due to the difficulty of finding suitable model systems. Ideally, model particles should be monodisperse, have tuneable axial ratios to reach the desired areas in the phase diagram, and a well-defined and possibly adjustable interaction potential.…”

“…25 An appropriate coating with silica and functionalisation through an additional polyelectrolyte layer then renders them highly stable even at very high densities, and over a large range of solvent conditions such as pH and ionic strength. 20 …”

Functional Iron Oxide Nanoparticles as Reversible Crosslinks for Magnetically Addressable Shape‐Memory Polymers

“…The Fe 3 O 4 nanoparticles are normally synthesized by reduction of an iron salt in the presence of surfactants, such as oleyl amine and oleic acid, followed by post‐synthesis ligand‐exchange with surface groups enhance the dispersibility in the SMP . Nevertheless, it has proven to be non‐trivial to prevent aggregation of the magnetic nanoparticles in polymer matrices due to their high surface area, which results in important contributions of van der Waals attractive forces …”