Importance of Surfactant Quantity and Quality on Growth Regime of Iron Oxide Nanoparticles

Abstract

This study shows the influence of selected nonstandard surfactants on the growth and properties of magnetite nanoparticles. Particles were obtained using thermally decomposed iron (III) acetylacetonate in an organic environment. For synthesis, three different concentrations (4, 8, and 16 mmol) of tested surfactants were used. Five types of each long-chain carboxylic acid and amines were selected for stabilization of nanoparticles. Nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, and infrared spectroscopy. Magnetic properties of the nanoparticles were tested by conventional room temperature Mössbauer spectroscopy with and without external magnetic field. TEM images clearly showed that application of tertiary amines causes the nanoparticles to form nanoflowers, in contrast to other compounds, which do not show such growth. Influence of surfactant amount on growth regime depends on the nature of the substances. Mössbauer spectroscopy confirms differences in magnetic core composition as a result of the surfactant amount present in synthetic procedure.

Tailoring the Magnetic and Hyperthermic Properties of Biphase Iron Oxide Nanocubes through Post-Annealing

“…Table 1 summarizes the changes in the H C , M S , SAR, and the lattice parameter-and in all the samples-and highlights the exceptional SAR value observed in the AO sample which possessed the highest H C, underscoring the general relation between H C and SAR which supersedes the effect of the M S . It is also worth mentioning that the lattice parameter (a) of sample AH, which shows the highest M S of 77.6 emu/g, matches the value of Fe 3 O 4 (8.40 Å) [23,72,73]. This highlights a correlation between the structure and magnetism of the Fe 3 O 4 phase.…”

Modification in Toxicity of l-Histidine-Incorporated ZnO Nanoparticles toward Escherichia coli

“…Based on the application, the appropriate methodology is adopted. Recently, the bioinspired synthesis of metal-oxide-based bioinorganic nanocomposites, especially nanosized ZnO, has drawn significant interest. , Integrating various amino acids, surfactants, or peptides during nanoparticle synthesis leads to different physiobiological properties of the newly synthesized nanocomposites. Glutamine , histidine , and glycine were employed to study the variation in the morphology of ZnO synthesized by the hydrothermal method .…”

The Use of Ferrofluids in Analytical Sample Preparation: A Review

“…Surfactants are the most widely used stabilizers in FFs due to their high molecular weight, which, in most cases, favors the establishment of steric repulsions, and, in the case of ionic surfactants, through the incorporation of the ionic repulsion. Oleic acid, lauric acid, palmitic acid, and stearic acid are some of the most representative surfactants used as stabilizer agents [11]. Some of the solvents used as FFs carriers have also been explored as ionic stabilizers, with ILs being the most popular solvents for this role [12].…”