scholarly journals Synthesis and antibacterial properties of Fe3O4-Ag nanostructures

2016 ◽  
Vol 18 (4) ◽  
pp. 110-116 ◽  
Author(s):  
Anna Pachla ◽  
Zofia Lendzion-Bieluń ◽  
Dariusz Moszyński ◽  
Agata Markowska-Szczupak ◽  
Urszula Narkiewicz ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Magnetic Properties ◽  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Antibacterial Properties ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
Bactericidal Properties ◽  
Bactericidal Agent

Abstract Superparamagnetic iron oxide nanoparticles were obtained in the polyethylene glycol environment. An effect of precipitation and drying temperatures on the size of the prepared nanoparticles was observed. Superparamagnetic iron oxide Fe3O4, around of 15 nm, was obtained at a precipitation temperature of 80°C and a drying temperature of 60°C. The presence of functional groups characteristic for a polyethylene glycol surfactant on the surface of nanoparticles was confirmed by FTIR and XPS measurements. Silver nanoparticles were introduced by the impregnation. Fe3O4-Ag nanostructure with bactericidal properties against Escherichia coli species was produced. Interesting magnetic properties of these materials may be helpful to separate the bactericidal agent from the solution.

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...

Impact of the chain length on the biodistribution profiles of PEGylated iron oxide nanoparticles: a multimodal imaging study

2021 ◽  
Author(s):  
Dimitri Stanicki ◽  
Lionel Larbanoix ◽  
Sébastien Boutry ◽  
Thomas Vangijzegem ◽  
Indiana Ternad ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Chain Length ◽  
Iron Oxide Nanoparticles ◽  
Multimodal Imaging ◽  
Imaging Study ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Chain Lengths

Bimodal sub-5 nm superparamagnetic iron oxide nanoparticles (SPIO-5) coated with polyethylene glycol of different chain lengths (i.e. PEG-800, -2000 and -5000) have been prepared and characterized.

scholarly journals Polyethylene Glycol-Chitosan Oligosaccharide-Coated Superparamagnetic Iron Oxide Nanoparticles: A Novel Drug Delivery System for Curcumin Diglutaric Acid

Biomolecules ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 73 ◽  
Author(s):  
Feuangthit Niyamissara Sorasitthiyanukarn ◽  
Chawanphat Muangnoi ◽  
Wuttinont Thaweesest ◽  
Pahweenvaj Ratnatilaka Na Bhuket ◽  
Pongsakorn Jantaratana ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Zeta Potential ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
Chitosan Oligosaccharide ◽  
Glycol Chitosan ◽  
Novel Drug Delivery System ◽  
Novel Drug

Curcumin diglutaric acid-loaded polyethylene glycol-chitosan oligosaccharide-coated superparamagnetic iron oxide nanoparticles (CG-PEG-CSO-SPIONs) were fabricated by co-precipitation and optimized using a Box–Behnken statistical design in order to achieve the minimum size, optimal zeta potential (≥ ±20 mV), and maximum loading efficiency and capacity. The results demonstrated that CG-PEG-CSO-SPIONs prepared under the optimal condition were almost spherical in shape with a smooth surface, a diameter of 130 nm, zeta potential of 30.6 mV, loading efficiency of 83.3%, and loading capacity of 8.3%. The vibrating sample magnetometer results of the optimized CG-PEG-CSO-SPIONs showed a superparamagnetic behavior. Fourier transform infrared spectroscopy and X-ray diffraction analyses indicated that the CG physically interacted with PEG-CSO-SPIONs. In addition, the CG-PEG-CSO-SPIONs could be stored dry for up to 12 weeks or in aqueous solution for up to 4 days at either 4 °C or 25 °C with no loss of stability. The CG-PEG-CSO-SPIONs exhibited a sustained release profile up to 72 h under simulated physiological (pH 7.4) and tumor extracellular (pH 5.5) environments. Furthermore, the CG-PEG-CSO-SPIONs showed little non-specific protein binding in the simulated physiological environment. The CG-PEG-CSO-SPIONs enhanced the cellular uptake and cytotoxicity of CG against human colorectal adenocarcinoma HT-29 cells compared to free CG, and more CG was delivered to the cells after applying an external magnetic field. The overall results suggest that PEG-CSO-SPIONs have potential to be used as a novel drug delivery system for CG.

scholarly journals Hybrid molecular-inorganic materials: a heterometallic [Ni4Tb] complex grafted on superparamagnetic iron oxide nanoparticles

2017 ◽  
Vol 4 (4) ◽  
pp. 595-603 ◽  
Author(s):  
L. Rosado Piquer ◽  
E. Jiménez Romero ◽  
Y. Lan ◽  
W. Wernsdorfer ◽  
G. Aromí ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Inorganic Materials ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Magnetic Substrate

Ni4Tb SMMs grafted onto superparamagnetic IO-NPs retain their magnetic properties intact on the surface of the magnetic substrate.

scholarly journals Study of the influence of autoclave sterilization on the properties of citrate functionalized iron oxide nanoparticles

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Thomas Girardet ◽  
Amel Cherraj ◽  
Astrid Pinzano ◽  
Christel Henrionnet ◽  
Franck Cleymand ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetic Measurements ◽  
Superparamagnetic Iron Oxide ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Water Dispersible ◽  
Before And After ◽  
One Step

Abstract Superparamagnetic Iron Oxide Nanoparticles (SPIONs) are widely used in various areas of the biomedical field: for diagnosis (Magnetic Resonance Imaging), for therapeutic applications (hyperthermia, nanovectorization). These applications require a good stability in water and no aggregation of SPIONs, with well-controlled physicochemical and magnetic properties. In this work, SPIONs functionalized by citrate ligands are synthesized in a one-step process with the aim of producing stable water-dispersible nanoparticles with a well-crystallized spinel structure. Microwave technology is implemented to achieve this objective given the ease, speed and reproducibility of the method. For their future use in biomedical applications, the sterilization of these SPIONs are essential by an autoclave treatment. The influence of this treatment on the physicochemical and magnetic properties of the SPIONs is determined by a systematic characterization before and after sterilization by Transmission Electronic Microscopy, Dynamic Light Scattering, X-ray Diffraction, Fourier Transformed Infra-Red, ThermoGravimetric Analysis and magnetic measurements.

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