scholarly journals Mechanism of magnetization reduction in iron oxide nanoparticles

Nanoscale ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 6965-6976
Author(s):  
Tobias Köhler ◽  
Artem Feoktystov ◽  
Oleg Petracic ◽  
Emmanuel Kentzinger ◽  
Tanvi Bhatnagar-Schöffmann ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Saturation Magnetization ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Major Contributor ◽  
Antiphase Boundaries ◽  
Acid Coating

Antiphase boundaries in iron oxide nanoparticles with oleic acid coating were found to be a major contributor to the observed reduction in saturation magnetization.

Effects of Oleic Acid Coating on the Coercive Force of Iron-oxide Nanoparticles

2012 ◽  
Vol 62 (2) ◽  
pp. 200-204
Author(s):  
Hongsub BAE ◽  
Ilsu RHEE* ◽  
Sungwook HONG
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Coercive Force ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Acid Coating

scholarly journals Effect of Oleic Acid Coating of Iron Oxide Nanoparticles on Properties of Magnetic Polyamide-6 Nanocomposite

JOM ◽  
2019 ◽  
Vol 71 (9) ◽  
pp. 3119-3128 ◽  
Author(s):  
Ranjeetkumar Gupta ◽  
Ketan Pancholi ◽  
Rulston De Sa ◽  
Duncan Murray ◽  
Dehong Huo ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Polyamide 6 ◽  
Oxide Nanoparticles ◽  
Acid Coating

scholarly journals Unravelling the Thermal Decomposition Parameters for The Synthesis of Anisotropic Iron Oxide Nanoparticles

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 881 ◽  
Author(s):  
Geoffrey Cotin ◽  
Céline Kiefer ◽  
Francis Perton ◽  
Dris Ihiawakrim ◽  
Cristina Blanco-Andujar ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Sodium Oleate ◽  
Shape Control ◽  
Oxide Nanoparticles ◽  
Chelating Ligand ◽  
Precursor Structure ◽  
Negative Effect ◽  
Magnetic Resonance Imaging Mri

Iron oxide nanoparticles are widely used as a contrast agent in magnetic resonance imaging (MRI), and may be used as therapeutic agent for magnetic hyperthermia if they display in particular high magnetic anisotropy. Considering the effect of nanoparticles shape on anisotropy, a reproducible shape control of nanoparticles is a current synthesis challenge. By investigating reaction parameters, such as the iron precursor structure, its water content, but also the amount of the surfactant (sodium oleate) reported to control the shape, iron oxide nanoparticles with different shape and composition were obtained, in particular, iron oxide nanoplates. The effect of the surfactant coming from precursor was taking into account by using in house iron stearates bearing either two or three stearate chains and the negative effect of water on shape was confirmed by considering these precursors after their dehydration. Iron stearates with three chains in presence of a ratio sodium oleate/oleic acid 1:1 led mainly to nanocubes presenting a core-shell Fe1−xO@Fe3−xO4 composition. Nanocubes with straight faces were only obtained with dehydrated precursors. Meanwhile, iron stearates with two chains led preferentially to the formation of nanoplates with a ratio sodium oleate/oleic acid 4:1. The rarely reported flat shape of the plates was confirmed with 3D transmission electronic microscopy (TEM) tomography. The investigation of the synthesis mechanisms confirmed the major role of chelating ligand and of the heating rate to drive the cubic shape of nanoparticles and showed that the nanoplate formation would depend mainly on the nucleation step and possibly on the presence of a given ratio of oleic acid and chelating ligand (oleate and/or stearate).

Characterization of Oleic-acid-coated Iron-oxide Nanoparticles Synthesized by Using a Coprecipitation Method

2014 ◽  
Vol 64 (3) ◽  
pp. 344-348
Author(s):  
Yousaf IQBAL ◽  
Ilsu RHEE ◽  
Hongsub BAE ◽  
Junghyun BYUN ◽  
Taeyoung JUNG ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Coprecipitation Method ◽  
Oxide Nanoparticles

Evaluation of cytotoxicity and genotoxicity induced by oleic acid‐coated iron oxide nanoparticles in human astrocytes

2019 ◽  
Vol 60 (9) ◽  
pp. 816-829 ◽  
Author(s):  
Natalia Fernández‐Bertólez ◽  
Carla Costa ◽  
Fátima Brandão ◽  
José Alberto Duarte ◽  
Joao Paulo Teixeira ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Human Astrocytes

Iron oxide nanoparticles modified with oleic acid: Vibrational and phase determination

2016 ◽  
Vol 99 ◽  
pp. 111-118 ◽  
Author(s):  
Paula P. Soares ◽  
Geórgia S. Barcellos ◽  
Cesar L. Petzhold ◽  
Vladimir Lavayen
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Phase Determination

Iron oxide nanoparticles stabilized with a bilayer of oleic acid for magnetic hyperthermia and MRI applications

2016 ◽  
Vol 383 ◽  
pp. 240-247 ◽  
Author(s):  
Paula I.P. Soares ◽  
César A.T. Laia ◽  
Alexandra Carvalho ◽  
Laura C.J. Pereira ◽  
Joana T. Coutinho ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Hyperthermia ◽  
Oxide Nanoparticles

Mechanisms of highly stabilized ex-situ oleic acid-modified iron oxide nanoparticles functionalized with 4-pentynoic acid

2018 ◽  
Vol 203 ◽  
pp. 212-222 ◽  
Author(s):  
Aainaa Aqilah Baharuddin ◽  
Bee Chin Ang ◽  
Nurul Athirah Abu Hussein ◽  
Andri Andriyana ◽  
Yew Hoong Wong
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Ex Situ ◽  
Oxide Nanoparticles

Non-aqueous to aqueous phase transfer of oleic acid coated iron oxide nanoparticles for hyperthermia application

RSC Advances ◽  
2014 ◽  
Vol 4 (9) ◽  
pp. 4515-4522 ◽  
Author(s):  
R. M. Patil ◽  
P. B. Shete ◽  
N. D. Thorat ◽  
S. V. Otari ◽  
K. C. Barick ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Aqueous Phase ◽  
Phase Transfer ◽  
Oxide Nanoparticles

Synthesis of PVP Coated Superparamagnetic Iron Oxide Nanoparticles with a High Saturation Magnetization

2019 ◽  
Vol 290 ◽  
pp. 301-306
Author(s):  
Osama Abu Noqta ◽  
Azlan Abdul Aziz ◽  
Adamu Ibrahim Usman
Keyword(s):  
Iron Oxide ◽  
Saturation Magnetization ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
High Saturation Magnetization ◽  
One Pot ◽  
High Saturation ◽  
Size Of Particles

Superparamagnetic iron oxide nanoparticles (SPION) were synthesized by one pot coprecipitation method at room temperature in the presence of Polyvinylpyrrolidone (PVP). X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and Vibrating Sample Magnetometer (VSM) were used to analysis the physicochemical properties of PVP-SPION. The XRD patterns confirmed that the structure of as-synthesized sample is magnetite with cubic structure system. In TEM results, the image of PVP-SPION displayed that the size of particles was 14.05 nm with narrower size distribution and also the PVP played important role to minimize the agglomeration of SPION. Finally, the high saturation magnetization value of PVP-SPION (53.0 emu/g) indicate the as-synthesized sample has a great potential as a contrast agent for MRI.

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