Quantifying intra- and extracellular aggregation of iron oxide nanoparticles and its influence on specific absorption rate

Nanoscale ◽  
2016 ◽  
Vol 8 (35) ◽  
pp. 16053-16064 ◽  
Author(s):  
Seongho Jeon ◽  
Katie R. Hurley ◽  
John C. Bischof ◽  
Christy L. Haynes ◽  
Christopher J. Hogan
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Oxide Nanoparticles ◽  
Specific Absorption

scholarly journals Designing Iron Oxide Nanoparticles for Image Guided Thermal Medicine Applications

2019 ◽  
Author(s):  
Hattie Ring ◽  
Sheng Tong ◽  
Zhe Gao ◽  
Navid Manuchehrabadi ◽  
Kaiyi Jiang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Field Strength ◽  
Iron Oxide Nanoparticles ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Oxide Nanoparticles ◽  
Image Guided ◽  
The Magnetic Field ◽  
The Ideal

This work evaluates MRI relaxation and the specific absorption rate properties of iron oxide nanoparticles (IONPs) as a function of diameter (6-32 nm). We conclude that the ideal IONP diameter for image guided heating applications is dependent on the magnetic field strength of the MRI for the intended application. <br>

scholarly journals Controlling structural and magnetic properties of IONPs by aqueous synthesis for improved hyperthermia

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13159-13170 ◽  
Author(s):  
Debora Bonvin ◽  
Alla Arakcheeva ◽  
Angel Millán ◽  
Rafael Piñol ◽  
Heinrich Hofmann ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Saturation Magnetization ◽  
Iron Oxide Nanoparticles ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Oxide Nanoparticles ◽  
Aqueous Synthesis ◽  
Vacancy Ordering ◽  
Structural And Magnetic Properties

Introducing a hydrothermal step after coprecipitation leads to iron oxide nanoparticles with higher vacancy ordering, saturation magnetization and specific absorption rate.

scholarly journals Hyperthermia Efficiency of Magnetic Nanoparticles in Dense Aggregates of Cerium Oxide/Iron Oxide Nanoparticles

2018 ◽  
Vol 8 (8) ◽  
pp. 1241 ◽  
Author(s):  
Cindy Yadel ◽  
Aude Michel ◽  
Sandra Casale ◽  
Jerome Fresnais
Keyword(s):  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Oxide Nanoparticles ◽  
Strong Impact ◽  
Heating Efficiency ◽  
Nanoparticles Dispersion

Iron oxide nanoparticles are intended to be used in bio-applications for drug delivery associated with hyperthermia. However, their interactions with complex media often induces aggregation, and thus a detrimental decrease of their heating efficiency. We have investigated the role of iron oxide nanoparticles dispersion into dense aggregates composed with magnetic/non-magnetic nanoparticles and showed that, when iron oxide nanoparticles were well-distributed into the aggregates, the specific absorption rate reached 79% of the value measured for the well-dispersed case. This study should have a strong impact on the applications of magnetic nanoparticles into nanostructured materials for therapy or catalysis applications.

scholarly journals Designing Iron Oxide Nanoparticles for Image Guided Thermal Medicine Applications

2019 ◽  
Author(s):  
Hattie Ring ◽  
Sheng Tong ◽  
Zhe Gao ◽  
Navid Manuchehrabadi ◽  
Kaiyi Jiang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Field Strength ◽  
Iron Oxide Nanoparticles ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Oxide Nanoparticles ◽  
Image Guided ◽  
The Magnetic Field ◽  
The Ideal

This work evaluates MRI relaxation and the specific absorption rate properties of iron oxide nanoparticles (IONPs) as a function of diameter (6-32 nm). We conclude that the ideal IONP diameter for image guided heating applications is dependent on the magnetic field strength of the MRI for the intended application. <br>

Size-dependent magnetic and inductive heating properties of Fe3O4 nanoparticles: scaling laws across the superparamagnetic size

2018 ◽  
Vol 20 (18) ◽  
pp. 12879-12887 ◽  
Author(s):  
Jeotikanta Mohapatra ◽  
Fanhao Zeng ◽  
Kevin Elkins ◽  
Meiying Xing ◽  
Madhav Ghimire ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Fe3o4 Nanoparticles ◽  
Absorption Rate ◽  
Scaling Laws ◽  
Specific Absorption Rate ◽  
Nanoparticle Size ◽  
Inductive Heating ◽  
Specific Absorption ◽  
Size Dependent

An efficient heat activating mediator with an enhanced specific absorption rate (SAR) value is attained via control of the iron oxide (Fe3O4) nanoparticle size from 3 to 32 nm.

scholarly journals Magnetization and Specific Absorption Rate Studies of Ball-Milled Iron Oxide Nanoparticles for Biomedicine

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
P. Burnham ◽  
N. Dollahon ◽  
C. H. Li ◽  
A. J. Viescas ◽  
G. C. Papaefthymiou
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Room Temperature ◽  
Average Diameter ◽  
Magnetic Interactions ◽  
Spherical Particles ◽  
Oxide Nanoparticles ◽  
Zero Field ◽  
Specific Absorption ◽  
Spectroscopic Signatures

Comparative studies are presented of iron oxide nanoparticles in the 7–15 nm average diameter range ball milled in hexane in the presence of oleic acid. Transmission electron microscopy identified spherical particles of decreasing size as milling time and/or surfactant concentration increased. Micromagnetic characterization via Mössbauer spectroscopy at room temperature yielded broadened magnetic spectroscopic signatures, while macromagnetic characterization via vibrating sample magnetometry of 7-8 nm diameter particles showed largely superparamagnetic behavior at room temperature and hysteretic at 2 K. Zero-field and field-cooled magnetization curves exhibited a broad maximum at ~215 K indicating the presence of strong interparticle magnetic interactions. The specific absorption rates of ferrofluids based on these nanoparticle preparations were measured in order to test their efficacies as hyperthermia agents.

One pot synthesis of monodisperse water soluble iron oxide nanocrystals with high values of the specific absorption rate

2014 ◽  
Vol 2 (28) ◽  
pp. 4426 ◽  
Author(s):  
Pablo Guardia ◽  
Andreas Riedinger ◽  
Simone Nitti ◽  
Giammarino Pugliese ◽  
Sergio Marras ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Water Soluble ◽  
One Pot ◽  
Specific Absorption ◽  
Soluble Iron ◽  
One Pot Synthesis
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