Facile method to synthesize oleic acid-capped magnetite nanoparticles

Synthesis of Well‐Dispersed Aqueous‐Phase Magnetite Nanoparticles and Their Metabolism as an MRI Contrast Agent for the Reticuloendothelial System

“…[23,24] Some peak position and width shifts are observed in different samples, indicating the different binding effects of these stabilizers on the surface of the Fe 3 O 4 NPs. [24][25][26][27] When using PVP as the dispersing agent (Figure 1b), some new absorption peaks typical for PVP appear besides the peaks from the Fe 3 O 4 (a sharp peak at 580 cm -1 for Fe-O bonds and a broad peak at 3417 cm -1 for OH groups) ( Figure 1a). The sharp peak at 1650 cm -1 is from C=O stretching in PVP, and the peak at 1292 cm -1 can be attributed to the stretching vibrations of the C-N bond in the amide group and the two other C-N groups.…”

“…The broad peak at 1439 cm -1 can be ascribed to symmetric COO -stretches from the combination of TSC and MAH. [24] The new broad peak at 1076 cm -1 represents the C=C bonds existing in MAH and/or the vibrations of C-C and C-O bonds from the TSC or PVP. [33] The broadened peak at 3444 cm -1 indicates that more OH groups exist in the coated Fe 3 O 4 NPs after addition of MAH, endowing the Fe 3 O 4 NPs with a higher hydrophilicity.…”

Controlling the size and size distribution of magnetite nanoparticles on carbon nanotubes

“…These changes of oleate group implied that the decomposition of oleate to a great extent related with annealing temperature. Oleate was completely decomposed under 600 • C from FTIR spectra, while an annealing temperature of 300 • C was not sufficient [24].…”

Influence of different synthesis conditions on properties of oleic acid-coated-Fe3O4 nanoparticles

“…According to the previous works, modification of the surface of Fe 3 O 4 nanoparticles during the synthesis by organic materials, like polymers [12][13][14][15][16] and fatty acid [17][18][19][20][21][22][23][24][25], can reduce the aggregation and prevent the possible air oxidation. Most of the aforementioned studies, which concerned the oleic acid, have been focused on the variations of parameters, like temperature, pH, amount of surfactant and stirring speed.…”