scholarly journals Reversible magnetism switching of iron oxide nanoparticle dispersions by controlled agglomeration

2021 ◽  
Author(s):  
Stephan Müssig ◽  
Björn Kuttich ◽  
Florian Fidler ◽  
Daniel Haddad ◽  
Susanne Wintzheimer ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Light Scattering ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Dispersions ◽  
Oxide Nanoparticle

The controlled agglomeration of superparamagnetic iron oxide nanoparticles (SPIONs) was used to rapidly switch their magnetic properties. Small-angle X-ray scattering (SAXS) and dynamic light scattering showed that tailored iron oxide...

Succinylated heparin monolayer coating vastly increases superparamagnetic iron oxide nanoparticle T2 proton relaxivity

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 12905-12914 ◽  
Author(s):  
Manman Xie ◽  
Shijia Liu ◽  
Christopher J. Butch ◽  
Shaowei Liu ◽  
Ziyang Wang ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Contrast Agents ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Clinical Use ◽  
History Of ◽  
Oxide Nanoparticle ◽  
Superparamagnetic Iron Oxide Nanoparticle

Superparamagnetic iron oxide nanoparticles (SPIONs) have a history of clinical use as contrast agents in T2 weighted MRI, though relatively low T2 relaxivity has caused them to fall out of favor as new faster MRI techniques have gained prominence.

Spatiotemporal Study of Iron Oxide Nanoparticle Monolayer Formation at Liquid/Liquid Interfaces by Using In Situ Small-Angle X-ray Scattering

2020 ◽  
Vol 124 (43) ◽  
pp. 23949-23963
Author(s):  
Jiayang Hu ◽  
Evan W. C. Spotte-Smith ◽  
Brady Pan ◽  
Roy J. Garcia ◽  
Carlos Colosqui ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Small Angle ◽  
Iron Oxide Nanoparticle ◽  
Liquid Interfaces ◽  
X Ray ◽  
Monolayer Formation ◽  
X Ray Scattering ◽  
Oxide Nanoparticle ◽  
Ray Scattering

scholarly journals Superparamagnetic iron oxide nanoparticle-loaded polyacrylonitrile nanofibers with enhanced arsenate removal performance

2016 ◽  
Vol 3 (5) ◽  
pp. 1165-1173 ◽  
Author(s):  
D. Morillo ◽  
M. Faccini ◽  
D. Amantia ◽  
G. Pérez ◽  
M. A. García ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Oxide Nanoparticle ◽  
Superparamagnetic Iron Oxide Nanoparticle

Novel nanocomposite sorbents of superparamagnetic iron oxide nanoparticles (SPION) supported onto electrospun polyacrylonitrile nanofibers were synthesized by a simple and scalable method.

scholarly journals Synthesis of Hyaluronic Acid-Conjugated Fe3O4@CeO2 Composite Nanoparticles for a Target-Oriented Multifunctional Drug Delivery System

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1018
Author(s):  
Chang Ryong Lee ◽  
Gun Gyun Kim ◽  
Sung Bum Park ◽  
Sang Wook Kim
Keyword(s):  
Drug Delivery ◽  
Magnetic Properties ◽  
Hyaluronic Acid ◽  
Iron Oxide ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
Ft Ir

This study is based on the principle that superparamagnetic iron oxide nanoparticles (Fe3O4) can be used to target a specific area given that their magnetic properties emerge when an external magnetic field is applied. Cerium oxide (CeO2), which causes oxidative stress by generating reactive oxygen species (ROS) in the environment of tumor cells, was synthesized on the surface of superparamagnetic iron oxide nanoparticles to produce nanoparticles that selectively kill cancer cells. In addition, hyaluronic acid (HA) was coated on the cerium’s surface to target CD44-overexpressing tumor cells, and natZr was chelated on the Fe3O4@CeO2 surface to show the usefulness of labeling the radioisotope 89Zr (T1/2 = 3.3 d). The synthesis of Fe3O4@CeO2 was confirmed by Fourier Transform-Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD) and Field Emission-Transmission Electron Microscope (FE-TEM). The coating of HA was confirmed by FT-IR, X-ray Photoelectron. Spectroscopy (XPS), FE-TEM, Energy-Dispersive X-ray Spectroscopy (EDS) and Thermogravimetric Analysis (TGA)/Differential Scanning Calorimetry (DSC). The sizes of the prepared nanoparticles were confirmed through FE-TEM and Field Emission-Scanning Electron (FE-SEM) (sizes of 15 to 30 nm), and it was confirmed that natZr was introduced onto the surface of the nanoparticles using EDS. The particle size of the dispersed material was limited through Dynamic Light Scattering (DLS) to about 148 nm in aqueous solution, which was suitable for the (enhanced permeation and retention) EPR effect. It was confirmed that the HA-coated nanoparticles have good dispersibility. Finally, a cytotoxicity evaluation confirmed the ability of CeO2 to generate ROS and target the delivery of HA. In conclusion, Fe3O4@CeO2 can effectively inhibit cancer cells through the activity of cerium oxide in the body when synthesized in nano-sized superparamagnetic coral iron that has magnetic properties. Subsequently, by labeling the radioactive isotope 89Zr, it is possible to create a theranostic drug delivery system that can be used for cancer diagnosis.

Small Angle X-ray Scattering of Iron Oxide Nanoparticle Monolayers Formed on a Liquid Surface

2015 ◽  
Vol 119 (19) ◽  
pp. 10727-10733 ◽  
Author(s):  
Datong Zhang ◽  
Chenguang Lu ◽  
Jiayang Hu ◽  
Seung Whan Lee ◽  
Fan Ye ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Small Angle ◽  
Liquid Surface ◽  
Iron Oxide Nanoparticle ◽  
X Ray ◽  
X Ray Scattering ◽  
Oxide Nanoparticle ◽  
Ray Scattering

Stable aqueous dispersions of bare and double layer functionalized superparamagnetic iron oxide nanoparticles for biomedical applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jano Markhulia ◽  
Shalva Kekutia ◽  
Vladimer Mikelashvili ◽  
László Almásy ◽  
Liana Saneblidze ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Light Scattering ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Point Of View ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Colloidal System ◽  
Colloidal Systems ◽  
X Ray

Abstract Superparamagnetic iron oxide nanoparticles (SPIONs) have attracted the particular interest of scientists from various disciplines since their obtaining to the present day. The physicochemical and pharmacokinetic properties of SPIONs-containing magnetic nanofluids, and their applicability in biomedicine, largely depend on the stability of the colloidal system, particle size, size distribution, net magnetic moment, phase composition, and type and properties of stabilizers. Also, in some cases, when using magnetic nanoparticles for biomedical purposes, it is necessary that the stabilizing ligands of nanoparticles should not significantly change the magnetic properties. From this point of view, the preparation of stable colloidal systems containing bare iron oxide nanoparticles (BIONs) in water at physiological pH attracts particular attention and becomes increasingly popular in scientific circles. This study is focused on the development of the synthesis of aqueous suspensions of SPIONs stabilized with various organic molecules (oleic acid [OA] and poly(ethylene glycol) monooleate - with molecular weights 460 and 860) using a modified controlled chemical coprecipitation reaction, as well as stable nanofluids containing BIONs in an aqueous medium at neutral pH (near-physiological). The obtained samples were characterized using X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy, small-angle x-ray scattering (SAXS), dynamic light scattering (DLS), electrophoretic light scattering (ELS), and Vibrating Sample Magnetometry.

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