Effects of 2,3-dimercaptosuccinic acid modified Fe2O3 nanoparticles on microstructure and biological activity of cardiomyocytes

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19493-19501 ◽  
Author(s):  
Yongchao Mou ◽  
Jin Zhou ◽  
Fei Xiong ◽  
Hong Li ◽  
Hongyu Sun ◽  
...  
Keyword(s):  
Biological Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Dimercaptosuccinic Acid ◽  
Oxide Nanoparticles ◽  
Fe2o3 Nanoparticles ◽  
Intracellular Ros

Iron oxide nanoparticles did not interfere with the microstructure, but decreased the intracellular ROS content of cardiomyocytes.

EB PVD synthesis of iron oxide nanoparticles and their biological activity

2020 ◽  
Vol 2020 (3) ◽  
pp. 54-61
Author(s):  
S.E. Litvin ◽  
◽  
Yu.A. Kurapov ◽  
E.M. Vazhnichaya ◽  
Ya.A. Stel’makh ◽  
...  
Keyword(s):  
Biological Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Quantification and biodegradability assessment of meso-2,3-dimercaptosuccinic acid adsorbed on iron oxide nanoparticles

2019 ◽  
Vol 1 (9) ◽  
pp. 3670-3679 ◽  
Author(s):  
S. Bemowsky ◽  
A. Rother ◽  
W. Willmann ◽  
J. Köser ◽  
M. Markiewicz ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Analytical Method ◽  
Coating Material ◽  
Dimercaptosuccinic Acid ◽  
Oxide Nanoparticles ◽  
Biodegradability Assessment

An analytical method was developed to quantify the amount of free and nanoparticle-bound dimercaptosuccinic acid to address the question whether or not the coating material is biodegradable.

scholarly journals Structural Characterization, Antimicrobial and Antioxidant Assay of Biogenically Synthesized Maghemite (γ-Fe2O3) Nanoparticles

2021 ◽  
pp. 32-41
Author(s):  
A. Leema Rose ◽  
B. Shabushree ◽  
Preeja P. Thattil
Keyword(s):  
Antimicrobial Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Ferrous Sulphate ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Fe2o3 Nanoparticles ◽  
X Ray

Aims: The present study focused on the optical and morphological characterization, antioxidant and antimicrobial activities of the biogenically synthesized iron oxide nanoparticles.  Methods: The preliminary phytochemical screening was done for the leaf extract of Annona reticulate L. The leaf extract and Ferrous Sulphate heptahydrate were used to synthesize the iron oxide nanoparticles under room temperature. The determination of antioxidant activity was done using DPPH free radical scavenging assay and the determination of antimicrobial activity using disc diffusion method. Results: The UV-visible spectra showed the sharp absorption peak at 278 nm. The Fourier-transform infrared spectroscopy studies revealed the role of phytochemical constituents in the leaf extract for the iron oxide nanoparticles formation.  X-ray diffraction pattern showed the presence of γ phase of Fe2O3 nanoparticles. Scanning electron microscope analysis showed the moderately spherical morphology of γ-Fe2O3 nanoparticles and Energy-dispersive X-ray peaks showed the presence of iron and oxygen in the synthesized nanoparticles.  Particle size analysis showed that the synthesized γ-Fe2O3possessed an average size of 115.9 nm. Conclusion: The synthesized γ-Fe2O3 nanoparticles have potential antioxidant and antimicrobial activity.

Functional Iron Oxide (Fe2O3) Nanoparticles Based Gas Sensor Operating at High Temperature

2019 ◽  
Author(s):  
Ricky W. Chuang
Keyword(s):  
High Temperature ◽  
Iron Oxide ◽  
Oxide Layer ◽  
Gas Sensor ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Fe2o3 Nanoparticles ◽  
Oxidation Reduction ◽  
Enclosed Chamber ◽  
Different Gases

The highly responsive gas sensor based on a metal-oxide-semiconductor (MOS) configuration which is conformally coated with iron oxide (Fe2O3) nanoparticles is hereby designed, fabricated, and systematically characterized for this study. The iron oxide nanoparticles are prepared by mixing altogether the respective amounts of FeCl2-4H2O, FeCl3-6H2O, and NaOH in terms of different molar ratios. The iron oxide overcoated gas sensor thus fabricated has been electronically probed in an enclosed chamber under a high-temperature condition during which the different gases are fed in individually and selectively. The presence of a particular gas is duly sensed by monitoring the changing magnitude of the current extracted from the sensor. The enhanced sensitivity of the MOS-based sensor overlaid with the Fe2O3 nanoparticles is attributed to a large surface area typically associated with nanoscale particles. The fabrication of the MOS-based sensor is entirely CMOS compatible and can be summarized as follows. First, the 400μm-thick silicon wafer is first RCA cleaned and then both sides of the wafer are coated with 800nm-thick oxide layer using high-pressure oxidation furnace. Next, a series of photolithographic steps followed by electron-beam-evaporated titanium lift-off is implemented to realize the heater pattern. Afterward, the resultant heater pattern is overcoated with a 400nm-thick oxide layer using plasma-enhanced chemical vapor deposition (PECVD). In order to open up an area for the subsequent deposition of iron oxide nanoparticles-embedded material while leaving the titanium heater protected by the same oxide layer, necessary photolithographic and buffered oxide etching (BOE) steps are performed. Finally, the interdigitated electrodes are deposited followed by injecting the viscous Fe2O3 nanoparticles-embedded solution over the electrodes. Once the sensor is successfully fabricated, the very sensor is placed on a temperature-controlled sample platform maintained at the desired temperature within an enclosed chamber. The entire sensor characterization is performed at a temperature of 300 degree Celsius. The operating mechanism of the sensor is intimately dependent on the oxidation-reduction reaction between the injected gas and Fe2O3 nanoparticles-embedded sensing film. As can be shown in the following figure, the ethanol (C2H5OH) gas vapor is functioned as a reducing agent, while nitrogen dioxide (NO2) gas, on the other hand, is behaved as an oxidizing agent instead. As ethanol gas vapor is injected, the oxygen ions of the ethanol produced at high temperature are converted back to the neutral oxygen atom while releasing the captured electrons back to to the iron oxide sensing film, thereby causing the detected current to go up. On the other hand, nitrogen dioxide is behaved as an oxidizing agent instead of by oxidizing the Fe2O3 film and grabbing the electrons away, thereby causing the detected current to drop in response to the presence of the NO2 gas vapor. Consequently, the reversing current-versus-time patterns associated with C2H5OH and NO2 are thus detected, which verify the different oxidation-reduction mechanisms associated with these two different gases. The optimization in the design of the iron oxide nanoparticles coated sensor in order to enhance the sensitivity and the response time in the detection of the different gases is currently being pursued and the subsequent results will be expected to publish elsewhere.

scholarly journals Effect of Iron Oxide Nanoparticles on the Physical Properties of Medium Density Fiberboard

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2911 ◽  
Author(s):  
Waheed Gul ◽  
Hussein Alrobei ◽  
Syed Riaz Akbar Shah ◽  
Afzal Khan
Keyword(s):  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Oxide Nanoparticles ◽  
Medium Density ◽  
Fe2o3 Nanoparticles ◽  
Thickness Swelling ◽  
Composite Samples

This paper investigates the influence of iron oxide (Fe2O3) nanoparticles on the physical properties of medium density fiberboard (MDF). In this study, three different nano iron oxide loadings, i.e., 0.5, 1.5 and 2.5 wt %, and untreated poplar fibers were used. The iron oxide (Fe2O3) nanoparticles were initially dispersed into urea formaldehyde resin using a high-vacuum mechanical stirrer before being incorporated into natural fibers. The untreated poplar fibers were wound onto metal frames to produce dry mat layers. Twenty different composite samples were made. All composite samples were tested for physical properties, i.e., thickness swelling, water absorption, moisture content and density in accordance with standards EN-317, ASTM D570, EN-322 and EN-323 respectively. Based on the results, it was found that the incorporation of homogeneously dispersed iron oxide nanoparticles significantly improved thickness swelling (Ts). Moreover, water absorption (WA) improved by up to 49.18 and 34.54%, respectively, at the highest loading of 2.5 wt %. Microstructure was investigated and characterized with scanning electron microscopy (SEM), x-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) and we examined whether iron oxide nanoparticles exhibit good interactions with urea formaldehyde and poplar wood fibers. Heat and mass transfer investigation in the form of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) was carried out due to the impact of Fe2O3 nanoparticles. The curing temperature and thermal stability of the resin were enhanced due to the addition of Fe2O3 nanoparticles. A one-way ANOVA statistical analysis was established to effectively control the use of Fe2O3 nanoparticles. Therefore, the presence of iron oxide nanoparticles in an epoxy polymer contributes to a stiffer matrix that, effectively, enhances the capability of improving the physical properties of nano MDF.

scholarly journals Selected features of morpho-functional reactions of eukaryotic microorganisms grown in the presence of maghemite iron oxide nanoparticles obtained by laser target evaporation

2018 ◽  
Vol 185 ◽  
pp. 10004 ◽  
Author(s):  
Elena V. Simonova ◽  
Tatyana P. Denisova ◽  
Roman T. Khandukhanov ◽  
Grigory Yu. Melnikov ◽  
Anatoly I. Medvedev ◽  
...  
Keyword(s):  
Biological Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Solid Medium ◽  
Oxide Nanoparticles ◽  
Significant Excess ◽  
Laser Target ◽  
Eukaryotic Microorganisms ◽  
Fe Ions ◽  
Number Of Cells

Biological activity of iron introduced into nutrient medium as a suspension of iron oxide nanoparticles (MNPs) synthesized by the laser target evaporation was investigated. Exophiala nigrum (E. nigrum) eukaryotes were grown either in the presence or in absence of MNPs. De-aggregated suspensions of Fe2.75O4 MNPs were added in concentrations of 1 to 104 maximum permissive dose (MPD, being 0.3 mg/L of Fe ions in water). Cells were exposed for 24 to 96 hours periods and then plated onto a solid medium. The effect of MNPs was evaluated by the change in the number of cells during exposure and the number and morphology of the colonies. For 1-10 MPD yeast showed unaltered characteristics. For 100 or 1000 MPD for 72 hours of exposure and above the number of cells increases up to 30 times in comparison with the control. A pronounced stimulating effect was revealed at 104 MPD of iron. A significant excess of the number of cells was observed for the first day. At exposures of 72 and 96 hours the differences in the number of cells in comparison with the control were 11 and 30 times, respectively. A change in the colonies morphology was observed at 100 MPD concentration.

Metal ion-mediated synthesis and shape-dependent magnetic properties of single-crystalline α-Fe2O3 nanoparticles

CrystEngComm ◽  
2014 ◽  
Vol 16 (25) ◽  
pp. 5566-5572 ◽  
Author(s):  
Wei Wu ◽  
Shuanglei Yang ◽  
Jun Pan ◽  
Lingling Sun ◽  
Juan Zhou ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Metal Ion ◽  
Oxide Nanoparticles ◽  
Fe2o3 Nanoparticles ◽  
Single Crystalline

Some useful insights into the synthesis and shape-dependent magnetic properties of iron oxide nanoparticles with different morphologies are presented.

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