Synthesis and Magnetic Properties of Fe₃O₄ Nanoparticles Coated with Biocompatible Double Hydrophilic Block Copolymer

Abstract

Fe3O4 nanoparticles coated with double hydrophilic biocompatible poly(sodium(2-sulfamate-3-carboxylate)isoprene)-b-poly(ethylene oxide) block copolymer were prepared by a one step precipitation method. The magnetic nanoparticles have 15 nm mean diameter (TEM), 68 nm hydrodynamic diameter, -30.10 mV zeta-potential and form very stable dispersion in aqueous media. Structural characterization using powder XRD and Mössbauer spectroscopy establish the magnetite phase, while thermogravimetric analysis and FT-IR spectroscopy confirm the presence of the block copolymer on the nanoparticles surface. The magnetic properties were determined using a vibrating sample magnetometer (VSM) at room temperature and reveal superparamagnetic behavior while the composite materials shows high saturation magnetization up to 67.7 emu/gr.

Facile solvothermal preparation of Fe3O4–Ag nanocomposite with excellent catalytic performance

“…51 In previous reports, many similar test results for the diffraction peaks of Fe 3 O 4 NPs have been described explicitly. [52][53][54] As for the pattern of the Fe 3 O 4 -Ag nanocomposite, obvious diffraction peaks could be observed and indexed to the (111), (200), (220) and (311) planes of pure face-centered cubic (fcc) silver crystals. 55 Fig .…”

Azide-Alkyne Huisgen [3+2] Cycloaddition Using CuO Nanoparticles

“…Block copolymers have received much attention as attractive templates or scaffolds for engineering inorganic nanostructured materials, especially to control the size and spatial arrangement of NPs [ 38 , 39 ] ( Scheme 4 ). Chemical activation by ultrasound, a nonconventional energy source, has become a very popular and useful technology in organic chemistry [ 40 ].…”

Facile Organometallic Synthesis of Fe-Based Nanomaterials by Hot Injection Reaction

“…Colloidal magnetic nanoparticles, with well-defined morphology and dimensionality, are of primary importance for both fundamental studies and prospective applications in many technological areas including magnetic storage devices [ 1 , 2 ], ferrofluids [ 3 , 4 , 5 ], magnetic resonance imaging [ 6 , 7 , 8 , 9 , 10 ], drug delivery [ 11 , 12 , 13 , 14 ], bio-separation [ 15 , 16 , 17 ], hyperthermia [ 18 , 19 , 20 , 21 , 22 ], sensing [ 23 , 24 , 25 ], and catalysis [ 26 , 27 , 28 , 29 ]. Amongst them iron-based magnetic materials including iron oxides [ 30 , 31 , 32 ], metallic iron [ 33 , 34 , 35 ], and iron alloys [ 36 , 37 , 38 ] have been extensively studied for many decades.…”

“…Amongst them iron-based magnetic materials including iron oxides [ 30 , 31 , 32 ], metallic iron [ 33 , 34 , 35 ], and iron alloys [ 36 , 37 , 38 ] have been extensively studied for many decades. A plethora of methodologies have been developed for their synthesis in both aqueous and non-aqueous media including co-precipitation [ 12 , 39 ], the polyol reaction [ 40 , 41 , 42 ], and thermolytic reactions at high temperature in an organic environment [ 43 , 44 ], which lead to the formation of monodispersed nanoparticles with controllable size, shape, and morphology [ 44 , 45 , 46 , 47 ]. Taking into consideration the synthesis of metallic iron nanoparticles and iron nanoalloys, well-defined morphologies in low dimension regimes and their stabilization against oxidation are challenges still to be overcome.…”