Gadolinium-doped magnetite nanoparticles from a single-source precursor

Abstract

A single source bimetallic precursor is used in the synthesis of octahedral Gd:Fe3O4nanoparticles in order to reduce separate nucleation.

Enhanced Supercapacitive and Magnetic Performances of Ho3+ Doped Iron Oxide Nanoparticles Prepared Through a Novel One‐Pot Electro‐Synthesis Method

“…These data confirmed the superparamagnetic nature of the electrosynthesized Ho‐IONPs. Furthermore, Ho‐IONPs sample exhibit proper superparamagnetic characteristics (i.e., higher M s and lower M r and H ci values) as compared with those reported in the literature like Sm 3+ doped IONPs with having Ms = 31.3 emu g −1 and Hci = 85.7 G, Eu 3+ doped IONPs with showing Ms = 23.6 emu g −1 and H ci = 74.3 G and Gd 3+ doped IONPs with exhibiting Ms = 32.9 and 28.9 emu g −1 at 100 and 300 K, respectively . Furthermore, these magnetic data are comparable with those of undoped IONPs electro‐synthesized at the similar electrochemical conditions.…”

“…Notably, a small shift in all diffraction peaks of doped sample is seen as compared with undoped one. These changes are occurred due to replacement the Fe 3+ ions in the magnetite lattice by the larger radius Ho 3+ ions . Magnetite that is Fe 3 O 4 have a cubic inverse spinel ferrite structure in which only Fe(III) ions in the octahedral sites and one Fe(II) and Fe(III) ions in the two tetrahedral site .…”

Influence of rare earth ion substitutions on the structural, optical, transport, dielectric, and magnetic properties of superparamagnetic iron oxide nanoparticles

“…Nanoparticles (NPs) have received a lot of attention in the last decade due to their unique properties and potential to be used in a wide range of applications [1]. Among all types of nanoparticles, biocompatible iron oxide nanoparticles (IONs) are used for various the smallest sized nanoparticles are not necessarily the best because they are often associated with very small magnetic moments which dramatically increase difficulties in manipulating the particles for applications with an external magnetic field at ambient temperature [8].…”

“…The estimated saturation magnetization of Eu:Fe 3 O 4 NPs (7.0 emu/g) is smaller than that of Gd:Fe 3 O 4 NPs (15 emu/g) at 300 K [13]. Douglas et al [1] prepared IONs doped with Gd 3+ ions by a surfactant-assisted thermolysis route. They measured the saturation magnetization (32.9 and 28.9 emu/g at 100 and 300 K respectively) and the specific absorption rate (3.7±0.6 W/g Fe when 0 H = 3 kA/m and f = 111 kHz).…”

Bis-tris propane as a flexible ligand for high-nuclearity complexes

“…Current areas of interest relate to single-molecule magnets (SMMs) [4,5]; magnetic refrigerants [6]; qubits [7]; complexes with toroidal moments [8]; the magnetic behavior of high symmetry systems [9][10][11]; magnetic bistability on surfaces [12]; mimics of the oxygen evolution center in photosystem II [13], and water oxidation electrocatalysis [14]; MRI contrast agents [15] and as precursors for magnetic nanoparticles [16], or lithographic resists [17]. However, the synthetic challenges involved in isolating such systems [18] and the search for emergent properties in larger and larger systems is also a major driving force [19][20][21][22][23].…”