Surface Modifications of Superparamagnetic Iron Oxide Nanoparticles with Polylactic Acid-Polyethylene Glycol Diblock Copolymer and Graphene Oxide for a Protein Delivery Vehicle

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.

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

Biomolecules ◽

10.3390/biom10010073 ◽

2020 ◽

Vol 10 (1) ◽

pp. 73 ◽

Cited By ~ 2

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.

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Correlation between physicochemical properties of superparamagnetic iron oxide nanoparticles and their reactivity with hydrogen peroxide

Canadian Journal of Chemistry ◽

10.1139/cjc-2020-0087 ◽

2020 ◽

Vol 98 (10) ◽

pp. 601-608

Author(s):

Taraneh Javanbakht ◽

Sophie Laurent ◽

Dimitri Stanicki ◽

Mathieu Frenette

Keyword(s):

Hydrogen Peroxide ◽

Iron Oxide ◽

Physicochemical Properties ◽

Iron Oxide Nanoparticles ◽

Superparamagnetic Iron Oxide ◽

Surface Modifications ◽

Oxide Nanoparticles ◽

Amine Groups ◽

The Comparative Study ◽

Positively Charged

The present study focuses on the effects of the physicochemical properties of superparamagnetic PEG-modified, positively charged, and negatively charged iron oxide nanoparticles (SPIONs) on their reactivity with hydrogen peroxide. Our hypothesis was that the reactivity of SPIONs in this reaction would depend on their surface properties. The comparative study of the nanoparticles with DLS and TEM revealed the average sizes of PEG-modified, positively charged, and negatively charged SPIONs. We observed that the reactivity of negatively charged SPIONs with hydrogen peroxide was less than that of positively charged SPIONs and that of these second nanoparticles was less than that of PEG-modified SPIONs. This difference in the reactivity of these SPIONs with hydrogen peroxide was attributed to the presence of carboxyl or amine groups on their surface. However, the values of the rate constants of the reactions of PEG-modified, positively charged, and negatively charged SPIONs with hydrogen peroxide showed that the reaction of negatively charged SPIONs with hydrogen peroxide was more rapid than that of PEG-modified SPIONs and the reaction of these second SPIONs with hydrogen peroxide was more rapid than that of positively charged SPIONs. The surface study of the SPIONs using XPS showed that the high-resolution spectra of these nanoparticles changed after reaction with hydrogen peroxide, which indicates their surface modifications. These investigations can help develop more appropriate nanoparticles with controlled physicochemical properties.

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Particle size determination from magnetization curves in reduced graphene oxide decorated with monodispersed superparamagnetic iron oxide nanoparticles

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2020.01.072 ◽

2020 ◽

Vol 566 ◽

pp. 107-119 ◽

Cited By ~ 4

Author(s):

Arnau Bertran ◽

Stefania Sandoval ◽

Judith Oró-Solé ◽

Àlvar Sánchez ◽

Gerard Tobias

Keyword(s):

Particle Size ◽

Graphene Oxide ◽

Iron Oxide ◽

Reduced Graphene Oxide ◽

Superparamagnetic Iron Oxide ◽

Oxide Nanoparticles ◽

Size Determination ◽

Magnetization Curves ◽

Reduced Graphene ◽

Particle Size Determination

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Synthesis and antibacterial properties of Fe3O4-Ag nanostructures

Polish Journal of Chemical Technology ◽

10.1515/pjct-2016-0079 ◽

2016 ◽

Vol 18 (4) ◽

pp. 110-116 ◽

Cited By ~ 11

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.

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