Atomic Scale Study on the Thermal Evolution of Local Structure and Magnetic Properties in Oleic Acid Coated Iron Oxide Nanoparticles

2013 ◽  
Vol 117 (47) ◽  
pp. 25042-25051 ◽  
Author(s):  
L. Herojit singh ◽  
R. Govindaraj ◽  
G. Amarendra ◽  
C. S. Sundar
Keyword(s):  
Magnetic Properties ◽  
Oleic Acid ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Local Structure ◽  
Thermal Evolution ◽  
Atomic Scale ◽  
Oxide Nanoparticles

Comparative study on the magnetic properties of iron oxide nanoparticles loaded on mesoporous silica and carbon materials with different structure

2009 ◽  
Vol 121 (1-3) ◽  
pp. 178-184 ◽  
Author(s):  
Sher Alam ◽  
Chokkalingam Anand ◽  
Radhakrishnan Logudurai ◽  
Veerappan V. Balasubramanian ◽  
Katsuhiko Ariga ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Mesoporous Silica ◽  
Comparative Study ◽  
Iron Oxide Nanoparticles ◽  
Carbon Materials ◽  
Oxide Nanoparticles

Photo-fluorescent and magnetic properties of iron oxide nanoparticles for biomedical applications

Nanoscale ◽  
2015 ◽  
Vol 7 (18) ◽  
pp. 8209-8232 ◽  
Author(s):  
Donglu Shi ◽  
M. E. Sadat ◽  
Andrew W. Dunn ◽  
David B. Mast
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Basic Science ◽  
Biomedical Applications ◽  
Oxide Nanoparticles ◽  
Nanometer Range

Iron oxide exhibits fascinating physical properties especially in the nanometer range, not only from the standpoint of basic science, but also for a variety of engineering, particularly biomedical applications.

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).

Enhanced Collective Magnetic Properties in 2D Monolayers of Iron Oxide Nanoparticles Favored by Local Order and Local 1D Shape Anisotropy

Langmuir ◽  
2016 ◽  
Vol 32 (6) ◽  
pp. 1621-1628 ◽  
Author(s):  
Delphine Toulemon ◽  
Yu Liu ◽  
Xavier Cattoën ◽  
Cédric Leuvrey ◽  
Sylvie Bégin-Colin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Shape Anisotropy ◽  
Local Order ◽  
Oxide Nanoparticles
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