scholarly journals SIMAROUBA GLAUCA BARK EXTRACT MEDIATED SYNTHESIS AND CHARACTERISATION OF IRON OXIDE AND SILVER NANOPARTICLES AND THEIR ANTIBACTERIAL, CYTOTOXIC AND PHOTOCATALYTIC ACTIVITY

2020 ◽  
pp. 23-28
Author(s):  
BEENA JOSE ◽  
RIYA MARTIN
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Absorption Maximum ◽  
Bark Extract ◽  
Oxide Nanoparticles ◽  
Uv Visible ◽  
Simarouba Glauca

Objective: The objective of the present study is the synthesis of iron oxide and silver nanoparticles using Simarouba glauca aqueous bark extract, characterization of the synthesized nanoparticles and evaluation of their antimicrobial, photocatalytic activity and cytotoxicity. Methods: The iron oxide and silver nanoparticles were synthesized using Simarouba glauca aqueous bark extract and crystal structures of the nanoparticles were determined by UV-Visible spectroscopy, Transmission Electron Microscopy, Scanning Electron Microscopy, X-ray Diffraction and Fourier Transform Infrared Spectroscopy. The in vitro cytotoxicity of the silver nanoparticles was evaluated using Dalton’s lymphoma ascites cells. The antibacterial assay of the silver nanoparticles was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed an absorption maximum at 280 nm and silver nanoparticles showed an absorption maximum at 436 nm. This is XRD pattern of iron oxide nanoparticles exhibited a characteristic peak at 26.85 is of maghemite the corresponding miller indices is (211) and the synthesized iron oxide nanoparticles are amorphous in nature. TEM image reveals the size of the synthesized iron oxide nanoparticles in the range of 26-30 nm and the size of silver nanoparticles is in the range of 120-140 nm. Green synthesized iron nanoparticles using Simarouba glauca bark extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide and silver nanoparticles using Simarouba glauca aqueous bark extract exhibited pronounced antibacterial, anticancer and photocatalytic activity and can be used in the textile industry and also as an external antiseptic in prevention and treatment of bacterial infections.

PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE USING IRON OXIDE NANOPARTICLES SYNTHESIZED USING ANNONA MURICATA LEAF EXTRACT

2020 ◽  
pp. 46-51
Author(s):  
BEENA JOSE ◽  
FEMY THOMAS
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Annona Muricata ◽  
Aqueous Leaf Extract ◽  
Oxide Nanoparticle ◽  
Uv Visible

Objective: The objective of the present study is the synthesis of iron oxide nanoparticles using Annona muricata aqueous leaf extract, characterization of the synthesized nanoparticles and evaluation of the antibacterial, photocatalytic activity and cytotoxicity. Methods: The iron oxide nanoparticle was synthesized using Annona muricata aqueous leaf extract and the crystal structure of the iron oxide nanoparticle was determined by UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The in vitro cytotoxicity of iron oxide nanoparticles was evaluated using Dalton’s lymphoma ascites cells and the antibacterial assay was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed a maximum absorption peak at 265 nm. This is the XRD pattern of iron oxide nanoparticles exhibited a distinct peak at 26.029 (2θ), accounting for crystal plane (211). SEM images revealed that the synthesized iron oxide nanoparticles were aggregated as irregular sphere shapes with rough surfaces. TEM image reveals the size of the synthesized iron oxide nanoparticles are spherical in shape with an average size of 20 nm. Green synthesized iron oxide nanoparticles using Annona muricata leaf extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide nanoparticles using Annona muricata aqueous leaf extract exhibited pronounced antibacterial, anticancer and photocatatytic activity and can be used in the textile industry for the purification of water contaminated with carcinogenic textile dyes. It can also be used as an external antiseptic in the prevention and treatment of bacterial infections.

Shaping and Cellular Uptake of Folic Acid Coated Gold and Magnetite Nanoparticles

2019 ◽  
Vol 9 (2) ◽  
pp. 166-172
Author(s):  
Ahmed A.G. El-Shahawy ◽  
Gamal Elghnam ◽  
Alsayed A.M. Alsherbini
Keyword(s):  
Folic Acid ◽  
Iron Oxide ◽  
Tumor Cells ◽  
Iron Oxide Nanoparticles ◽  
Individual Cell ◽  
Oxide Nanoparticles ◽  
Cellular Compartment ◽  
Specific Tumor ◽  
Uv Visible

Background:Gold and Iron Oxide nanoparticles NPs play as nanocarriers for a specific drug delivery and contrast agents. Intercellular uptake of these nanoparticles and targeting to individual cell and sub-cellular compartment is essential.Objective:The aim of the current study is to evaluate the intracellular uptake of these NPs to specific tumor cells in vitro conjugated with folic acid with a goal of enhancing the efficiency of specific targeting to tumor cells.Methods:We synthesized the nanoparticles by a chemical method and characterized by UV-Visible, FTIR, XRD, and TEM.Results & Conclusion:The results revealed the conjugation of Gold and Iron Oxide nanoparticles with folic acid increased the intercellular uptake with high percent compared to non- conjugated nanoparticles.

Mechanical Behavior of Functional Hybrid Coating Based on Anisotropic Iron Oxide Nanoparticles

2007 ◽  
Vol 1007 ◽  
Author(s):  
Nicolas Chemin ◽  
Laurence Rozes ◽  
Corinne Chanéac ◽  
Sophie Cassaignon ◽  
Jean-Pierre Jolivet ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Uv Light ◽  
Point Of View ◽  
Hybrid Coatings ◽  
Oxide Nanoparticles ◽  
Iron Oxide Particles ◽  
Cross Sectional ◽  
Glass Substrates

ABSTRACTFunctional hybrid coatings have been elaborated from a polymer matrix incorporating iron oxide nanoparticles. Stable aqueous suspensions of goethite (α-FeOOH) nanorods, obtained by controlled precipitation of Fe3+ ions, were introduced in 2-hydroxyethyl methacrylate (HEMA). The films were spin-coated on glass substrates from the solutions prior to a UV light induced free radical polymerization step. Nanoindentation tests were carried out to investigate the mechanical properties of the hybrid coatings. Swelling measurements and Fourier Transformed Infrared Spectroscopy (FTIR) were used to characterize the interface between the iron oxide nanoparticles and the PHEMA matrix. Cross-sectional scanning electron microscopy (SEM) and transmission electron microscopy (TEM) was performed to evaluate the dispersion state of the iron oxide particles through the matrix. From a mechanical point of view, iron oxide nanorods yield to a strong reinforcement effect of PHEMA (increase in modulus and hardness by a factor 2 with 5%vol goethite nanoparticles). Origins of such reinforcement are attributed to the existence of highly favourable interactions at the goethite-PHEMA interface combined with a homogeneous dispersion of the particles. The nature of these interactions and evidences of there influence on the mechanical behaviour of the nanohybrid coatings are reported.

ß-Amido Acid Functionalised Superparamagnetic Iron Oxide Nanoparticles as a Novel Carrier for Efficient Delivery of Doxorubicine

2017 ◽  
Vol 41 (3) ◽  
pp. 129-135
Author(s):  
Fatemeh Ebrahimi ◽  
Maryam Karimi ◽  
Hasan Sereshti ◽  
Mohsen Yousefifar
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Precipitation Method ◽  
Hydrodynamic Diameter ◽  
Oxide Nanoparticles ◽  
Amido Acid

Superparamagnetic iron oxide nanoparticles are increasingly used in medical applications due to their unique physical properties. They are useful carriers for delivering antitumour drugs in targeted cancer treatment. In this study, amido acid-functionalised magnetic nanoparticles (AAFMNs) are used as drug-delivery vehicles for doxorubicine as an efficient tool for the treatment of cancer. Magnetic iron oxide nanoparticles were synthesised using a co-precipitation method. The prepared iron oxide nanoparticles were then functionalised with amido acid functional groups. Finally, the synthesised AAFMNs were used for the delivery of doxorubicine. AAFMNs were characterised by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis and zeta potential. An in vitro-determined hydrodynamic diameter of ∼80 nm suggested their applicability for this purpose. The findings show that AAFMNs are a promising tool for potential magnetic drug delivery.

scholarly journals Magnetic iron oxide nanoparticles as long wavelength photoinitiators for free radical polymerization

2015 ◽  
Vol 6 (11) ◽  
pp. 1918-1922 ◽  
Author(s):  
Sajjad Dadashi-Silab ◽  
Yasemin Yar ◽  
Havva Yagci Acar ◽  
Yusuf Yagci
Keyword(s):  
Photocatalytic Activity ◽  
Free Radical ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Lauric Acid ◽  
Oxide Nanoparticles ◽  
Vinyl Monomers ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Long Wavelength ◽  
Free Radical Photopolymerization

Iron oxide nanoparticles (Fe3O4 NPs) capped with lauric acid agents were synthesized and their photocatalytic activity was investigated in free radical photopolymerization of vinyl monomers.

scholarly journals Synthesis and characterization of dextran-coated iron oxide nanoparticles

2018 ◽  
Vol 5 (3) ◽  
pp. 171525 ◽  
Author(s):  
Andra Mihaela Predescu ◽  
Ecaterina Matei ◽  
Andrei Constantin Berbecaru ◽  
Cristian Pantilimon ◽  
Claudia Drăgan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Quantum Interference ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles ◽  
Transmission Electron ◽  
Molar Weight ◽  
Co Precipitation

Synthesis and characterization of iron oxide nanoparticles coated with a large molar weight dextran for environmental applications are reported. The first experiments involved the synthesis of iron oxide nanoparticles which were coated with dextran at different concentrations. The synthesis was performed by a co-precipitation technique, while the coating of iron oxide nanoparticles was carried out in solution. The obtained nanoparticles were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction spectrometry, Fourier transform infrared spectroscopy and superconducting quantum interference device magnetometry. The results demonstrated a successful coating of iron oxide nanoparticles with large molar weight dextran, of which agglomeration tendency depended on the amount of dextran in the coating solution. SEM and TEM observations have shown that the iron oxide nanoparticles are of about 7 nm in size.

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