Simple synthesis of superparamagnetic magnetite nanoparticles as highly efficient contrast agent

p‐Phosphonated Calix[n]arene Stabilizes Superparamagnetic Nanoparticles for Nitrate and Phosphate Uptake

“…[33] The measured magnetic saturation was lower than that of bulk magnetite (92 emu g À1 ) [21b] but is still considered good for small nanoparticles. [38] Small nanoparticles exhibit low magnetic saturation due to broken bonds, substitutions and defects on the surface. [39] As particles get smaller,t he proportion of surfacea toms increases, andt he effect of these surface anisotropies is to increase the magnetic anisotropy of the whole material.…”

Synthesis and characterization of magnetite nano particles with high selectivity using in-situ precipitation method

“…[2] Production of metallic nanoparticles and using them for their superparamagnetic properties are quite common in therapeutic and diagnostic applications, such as magnetic resonance imaging (MRI). [3,4] These iron oxides find applications as catalysts, [5] sorbents, [6] pigments, [7] flocculants, [8] coatings, [9] gas sensors, [10,11] wastewater treatment, [12] and for lubrication. [13,14] Similarly these nano particles can also be used in different advanced processes to form nano reactor, added into polymer films and other products, based on their superior magnetic properties.…”

Organization dependent collective magnetic properties of secondary nanostructures with differential spatial ordering and magnetic easy axis orientation

“…Magnetic nanoparticles below the single-domain state show this unusual property, where spins of individual particle act as giant spin, called super-spin, can randomly flip direction at room temperature [1][2][3]. According to Neel-Brown model of magnetization reversal of superparamagnetic particles, the mean time between two flips is given by Neel-Arrhenius equation τ τ…”