Journal of Materials Science: Materials in Electronics, Feb 9, 2022
This paper aims to synthesis and characterization of SrFeO 3 /TiO 2 nanocomposite with enhanced v... more This paper aims to synthesis and characterization of SrFeO 3 /TiO 2 nanocomposite with enhanced visible-light activity. At first, SrFeO 3 nanoparticles were successfully synthesized by the thermal treatment method, and then Titania nanoparticles were prepared by hydrolysis precipitation process. Composite nanoparticles were synthesized at different ratios of Titania to Ferrite. To characterize the nanocomposites’ structure, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Brunauer Emmett Teller were applied. Furthermore. The UV–Vis diffuse reflectance spectra showed the red shift in the absorption spectra of the nanocomposites were significantly related to the ratio of Titania to Ferrite. Moreover, the photocatalytic activity of the nanocomposites was assessed under visible-light, considering Congo red dye degradation. By the ratio of the component of 1:0.5, the photocatalytic degradation efficiency reached 82% after 30 min of irradiation. PL spectroscopy was applied as a practical technique to examine the separation efficiency of the photogenerated carrier pairs in TiO 2 , SrFeO 3 , SrFeO 3 /TiO 2 (1:0.5). The accordance between PL and photocatalytic results, showed vital role of the constructed heterojunction in the nanocomposites to prevent the charge carrier recombination. Also, the synthesized SrFeO 3 /TiO 2 (1:0.5) nanocomposite showed a suitable reusability in the model pollutant treatment.
This paper aims to synthesize and describe BiFeO3/TiO2 nanocomposite with enhanced visible-light ... more This paper aims to synthesize and describe BiFeO3/TiO2 nanocomposite with enhanced visible-light activity. At first, BiFeO3 nanoparticles were successfully synthesized by the thermal treatment method, and then titania nanoparticles were prepared by hydrolysis precipitation process. Composite nanoparticles were synthesized at different ratios of ferrite to titania. To characterize the nanocomposites’ structure, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis were applied. The UV–visible diffuse reflectance spectra showed that redshift in the absorption spectra of the nanocomposites was significantly related to the ratio of ferrite to titania. Moreover, the photocatalytic activity of the nanocomposites was researched under visible light, discussing Congo red dye degradation. The best result was obtained by the BiFeO3/TiO2 (1:1), which the photocatalytic degradation efficiency reached 60% after 30 min of irradiation. PL spectroscopy was applied as a practical technique to examine the separation efficiency of the photogenerated carrier pairs. The accordance between PL and photocatalytic results showed vital role of the constructed heterojunction in the nanocomposites to prevent the charge carrier recombination. Also, the synthesized BiFeO3/TiO2 (1:1) nanocomposite showed a suitable reusability in the model pollutant treatment.
Co 1-X Zn x Fe 2 O 4 based nanocarriers for dual-targeted anticancer drug delivery: synthesis, ch... more Co 1-X Zn x Fe 2 O 4 based nanocarriers for dual-targeted anticancer drug delivery: synthesis, characterization and in Vivo and in Vitro biocompatibility study
Journal of Nanomedicine & Nanotechnology, Aug 27, 2015
We fabricated chromium based single-electron transistors comprising small-area Cr/CrO x /Cr tunne... more We fabricated chromium based single-electron transistors comprising small-area Cr/CrO x /Cr tunnel junctions with an evaporated chromium oxide barrier. The transistors are fabricated using e-beam lithography with a bilayer resist and two-angle shadow evaporation. We describe the fabrication process and discuss the device characteristics.
In this paper, nanostructured perovskite-type LnFeO 3 (Ln = Nd, Sm) oxides were synthesized by th... more In this paper, nanostructured perovskite-type LnFeO 3 (Ln = Nd, Sm) oxides were synthesized by thermal treatment method (TTM). Characterization analysis conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-Raman spectroscopy, have confirmed the perovskite structure of the synthesized nanomaterials. To study the effects of Nd and Sm lanthanides substitution at the A-site on the chemical sensing performance, conductometric and electrochemical sensors based on the synthesized LnFeO 3 samples were fabricated. LnFeO 3-based conductometric and electrochemical sensors were tested for acetone and dopamine sensing, respectively. The data revealed that Nd and Sm in the A-position lead to a significant influence in the gas sensing and electrochemical properties of perovskite LnFeO 3 samples. In particular, it has been demonstrated the good gas sensing characteristics of SmFeO 3 for acetone gas (Response = R/R 0 = 8.3-20 ppm acetone at 200°C), whereas NdFeO 3 displayed better performance as electrode for the electrochemical detection of dopamine reaching a low detection limit (LOD) of 270 nM at S/N = 3. The electrical and electrochemical characteristics of the perovskite LnFeO 3 samples were discussed in detail with respect to their chemical composition and microstructure.
Journal of Photochemistry and Photobiology A-chemistry, Dec 1, 2019
Abstract Through a thermal treatment method, LiFe5O8 nanoparticles are prepared and by using situ... more Abstract Through a thermal treatment method, LiFe5O8 nanoparticles are prepared and by using situ polymerization method, reduced graphene oxide/lithium ferrite (RGO/LiFe5O8) nanocomposites with the ratios of 0.15, 0.20 and 0.25 are created. The structural and physical properties of prepared samples are analyzed by different techniques. By using degradation of methylene blue (MB), photocatalytic activity is investigated under visible light. The combination of LiFe5O8 nanoparticles with RGO causes the enhancement of photocatalytic activity in same conditions. Moreover, after five recycles, photocatalytic activity of RGO/LiFe5O8 does not change as compared to the photocatalytic activity of fresh catalyst, indicating the stability and reusability of RGO/LiFe5O8. Additionally, the antibacterial characteristics of studied samples were investigated against Staphylococcus aureus (S. aureus) as Gram- positive bacteria and Escherichia coli (E. coli) as a Gram- negative bacteria with inhibition zone and colony counting methods. According to obtained results, the pure LiFe5O8 do not have any antibacterial effect on S. aureus, and E. coli. RGO/LiFe5O8 nanocomposites with the maximum concentration of RGO have a greater antibacterial effect on S. aureus, and E. coli than LiFe5O8 nanoparticles and RGO/LiFe5O8 nanocomposites with lower RGO ratios.
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Journal of Magnetism and Magnetic Materials, Jul 1, 2011
... Acknowledgment The authors would like to thank Miss. Fatemeh Moazami Goodarzi for her great a... more ... Acknowledgment The authors would like to thank Miss. Fatemeh Moazami Goodarzi for her great assistance in the chemical mechanism study. ... [8] J. Amighian, M. Mozaffari, B. Nasr, Preparation of nano-sized manganese ferrite (MnFe2O4) via coprecipitation method, Phys. ...
ABSTRACT Cobalt ferrite nanocrystals were prepared from an aqueous solution containing metal nitr... more ABSTRACT Cobalt ferrite nanocrystals were prepared from an aqueous solution containing metal nitrates and various of concentrations of poly(vinyl pyrrolidone), followed by calcinations temperature. X-ray diffraction (XRD) analysis was performed to determine the degree of crystallinity of the ferrite nanoparticles. By transmission electron microscopy (TEM), the morphology and average particle size of the cobalt ferrite nanoparticles were evaluated which had good agreement with XRD results. Fourier transform infrared spectroscopy (FT-IR) suggested the presence of metal oxide bands in all samples as well as the effective elimination of organic constituents after calcinations. Vibrating sample magnetometer (VSM), was utilized to evaluate the magnetic properties of the cobalt ferrite nanoparticles.
Analytical and Bioanalytical Chemistry, Jul 8, 2019
A new electrochemical sensor, based on NdFeO 3 nanoparticles as electrocatalytic material, was pr... more A new electrochemical sensor, based on NdFeO 3 nanoparticles as electrocatalytic material, was proposed here for the detection of dopamine (DA). NdFeO 3 nanoparticles were first synthesized by a simple thermal treatment method and subsequent annealing at high temperature (700°C). The prepared electrocatalytic material has been characterized in detail by SEM-EDX, XRD, and Raman techniques. Characterization results display its sheet-like morphology, constituted by a porous network of very small orthorhombic NdFeO 3 nanoparticles. NdFeO 3 electrocatalytic material was then used to modify the working electrode of screen-printed carbon electrodes (SPCEs). Electrochemical tests demonstrated that NdFeO 3modified screen-printed carbon electrode (NdFeO 3 /SPCE) exhibited a remarkable enhancement of the dopamine electrooxidation, compared to the bare SPCE one. The analytical performance of the developed sensor has been evaluated for the detection of this analyte by means of the square-wave voltammetry (SWV) technique. The modified electrode showed two linear concentration ranges, from 0.5 to 100 μM and 150 to 400 μM, respectively, a limit of detection (LOD) of 0.27 μM (at S/N = 3), and good reproducibility, stability, and selectivity. Additionally, we also report an attempt made to propose the modified sensor for the simultaneous detection of dopamine and uric acid (UA). The procedure was also applied for the determination of dopamine in spiked real samples. So, this paper reports for the first time the use of a modified NdFeO 3 screen-printed electrode for developing an electrochemical sensor for the quantification of important biomolecules.
The surface plasmon resonance sensor was used to detect and measure low concentrations of sugar. ... more The surface plasmon resonance sensor was used to detect and measure low concentrations of sugar. A polypyrrole-chitosan-BaFe 2 O 4 nanocomposite layer was prepared to improve the surface of the gold layer for the detection of glucose, fructose, and sucrose using the surface plasmon resonance technique. The polypyrrole-chitosan-BaFe 2 O 4 was synthesized using the electrodeposition method in different thicknesses. The functional group, crystal structure, and morphology of the layer were investigated with Fourier transform infrared spectroscopy, X-ray diffraction technique, and field emission electron microscopy. Consequently, the BaFe 2 O 4 was scattered on the surface of the polymer, and the affinity of polypyrrole-chitosan-BaFe 2 O 4 to bond with glucose is higher than that for the other sugars. The sensor limit was 0.005 ppm.
LaFeO3 nanoparticles were synthesized by different chemical procedures, i.e., microwave-thermal t... more LaFeO3 nanoparticles were synthesized by different chemical procedures, i.e., microwave-thermal treatment method (MTTM), hydrothermal method (HTM) and sol–gel method (SGM), by using metal nitrates as La- and Fe-precursors. The synthesized nanoparticles were calcined at various temperature from 450°C to 1000°C. SEM analysis of samples synthesized by MTTM and SGM highlighted the formation of uniform spherical-like nanoparticles while those obtained by HTM were a combination of spherical particles and nanorods. X-ray diffraction patterns of nanocrystals confirmed that these nanoparticles are formed by crystalline LaFeO3 in the orthorhombic structure. The synthesized LaFeO3 were further investigated for analyzing their optical, magnetic and gas sensing behaviors. Band gap values for LaFeO3 by MTTM and HTM were in the range 2.07–2.41 eV and 1.57–1.94 eV, respectively, for the samples annealed at growing temperature, whereas vibrating sample magnetometer analysis demonstrated their weak ferromagnetic behavior. LaFeO3 synthesized by SGM showed interesting sensing properties for monitoring O2 and ethanol in ambient air.
Journal of Inorganic and Organometallic Polymers and Materials, Jul 26, 2020
In this project, Calcium ferrite/polyvinyl alcohol (CaFe 2 O 4 @PVA) nanocarriers were prepared b... more In this project, Calcium ferrite/polyvinyl alcohol (CaFe 2 O 4 @PVA) nanocarriers were prepared by a thermal-treatment method at three different temperatures (773, 823 and 923 K). The nanocarriers were used as drug delivery systems (DDS) to deliver curcumin (CUR) and were utilized as a new structure for photo dynamic therapy (PDT). Drug loading and release study of CUR were performed and it was observed that nanocarriers showed a pH dependent drug release behavior. MTT assay, Hemolysis assay and lethal dose test were applied to determine the cytotoxicity of nanocarriers. These tests indicated that synthesized nanocarriers can be considered as nontoxic. Also, the photodynamic therapy experiments were performed by two groups: one group of cells were treated by different concentrations of nanocarriers without light and the other group were exposed to light. Then, the efficacy of PDT was determined by MTT and it was revealed that whenever nanocarriers were exposed to light the cytotoxicity was significantly high. Therefore, it was revealed that these nanocarriers are suitable to be utilized as a drug delivery systems and photo dynamic therapy agent.
Journal of Magnetism and Magnetic Materials, Oct 1, 2015
Cite this article as: Mahmoud Naseri, Optical and magnetic properties of monophasic cadmium ferri... more Cite this article as: Mahmoud Naseri, Optical and magnetic properties of monophasic cadmium ferrite (CdFe 2 O 4) nanostructure prepared by thermal treatment method,
A polypyrrole-chitosan/nickel ferrite nanoparticle composite layer was prepared using the electro... more A polypyrrole-chitosan/nickel ferrite nanoparticle composite layer was prepared using the electrochemical method to detect nickel, iron, cobalt, aluminium, manganese, mercury, and lead ions. The polypyrrole-chitosan/nickel ferrite nanoparticle composite layers were characterized using field emission electron microscopy, energy dispersive spectroscopy, and X-ray diffraction spectroscopy. The polymer composite was used to improve the surface of the gold layer to apply the surface plasmon resonance technique. The sensor detected the ferromagnetic ions down to a level of 0.001 ppm, and the detection of diamagnetic ions was conducted with a limitation of roughly 0.5 ppm. The polymer composite improved the response time of the sensor better than the other polymer composite sensing layers did.
... 2767-2772. [11] RK Selvan, CO Augustin, LJ Berchmans, and R. Saraswathi, “Combustion synthesi... more ... 2767-2772. [11] RK Selvan, CO Augustin, LJ Berchmans, and R. Saraswathi, “Combustion synthesis of CuFe2O4,” Mater. ... [19] MK shobana,V. Rajendran, K. Jeyasubramanian, and NS Kumar, “Preparation and characterisation of NiCo ferrite nanoparticles,” Mater. Lettvol, vol. ...
Journal of Materials Science: Materials in Electronics, Feb 9, 2022
This paper aims to synthesis and characterization of SrFeO 3 /TiO 2 nanocomposite with enhanced v... more This paper aims to synthesis and characterization of SrFeO 3 /TiO 2 nanocomposite with enhanced visible-light activity. At first, SrFeO 3 nanoparticles were successfully synthesized by the thermal treatment method, and then Titania nanoparticles were prepared by hydrolysis precipitation process. Composite nanoparticles were synthesized at different ratios of Titania to Ferrite. To characterize the nanocomposites’ structure, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Brunauer Emmett Teller were applied. Furthermore. The UV–Vis diffuse reflectance spectra showed the red shift in the absorption spectra of the nanocomposites were significantly related to the ratio of Titania to Ferrite. Moreover, the photocatalytic activity of the nanocomposites was assessed under visible-light, considering Congo red dye degradation. By the ratio of the component of 1:0.5, the photocatalytic degradation efficiency reached 82% after 30 min of irradiation. PL spectroscopy was applied as a practical technique to examine the separation efficiency of the photogenerated carrier pairs in TiO 2 , SrFeO 3 , SrFeO 3 /TiO 2 (1:0.5). The accordance between PL and photocatalytic results, showed vital role of the constructed heterojunction in the nanocomposites to prevent the charge carrier recombination. Also, the synthesized SrFeO 3 /TiO 2 (1:0.5) nanocomposite showed a suitable reusability in the model pollutant treatment.
This paper aims to synthesize and describe BiFeO3/TiO2 nanocomposite with enhanced visible-light ... more This paper aims to synthesize and describe BiFeO3/TiO2 nanocomposite with enhanced visible-light activity. At first, BiFeO3 nanoparticles were successfully synthesized by the thermal treatment method, and then titania nanoparticles were prepared by hydrolysis precipitation process. Composite nanoparticles were synthesized at different ratios of ferrite to titania. To characterize the nanocomposites’ structure, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis were applied. The UV–visible diffuse reflectance spectra showed that redshift in the absorption spectra of the nanocomposites was significantly related to the ratio of ferrite to titania. Moreover, the photocatalytic activity of the nanocomposites was researched under visible light, discussing Congo red dye degradation. The best result was obtained by the BiFeO3/TiO2 (1:1), which the photocatalytic degradation efficiency reached 60% after 30 min of irradiation. PL spectroscopy was applied as a practical technique to examine the separation efficiency of the photogenerated carrier pairs. The accordance between PL and photocatalytic results showed vital role of the constructed heterojunction in the nanocomposites to prevent the charge carrier recombination. Also, the synthesized BiFeO3/TiO2 (1:1) nanocomposite showed a suitable reusability in the model pollutant treatment.
Co 1-X Zn x Fe 2 O 4 based nanocarriers for dual-targeted anticancer drug delivery: synthesis, ch... more Co 1-X Zn x Fe 2 O 4 based nanocarriers for dual-targeted anticancer drug delivery: synthesis, characterization and in Vivo and in Vitro biocompatibility study
Journal of Nanomedicine & Nanotechnology, Aug 27, 2015
We fabricated chromium based single-electron transistors comprising small-area Cr/CrO x /Cr tunne... more We fabricated chromium based single-electron transistors comprising small-area Cr/CrO x /Cr tunnel junctions with an evaporated chromium oxide barrier. The transistors are fabricated using e-beam lithography with a bilayer resist and two-angle shadow evaporation. We describe the fabrication process and discuss the device characteristics.
In this paper, nanostructured perovskite-type LnFeO 3 (Ln = Nd, Sm) oxides were synthesized by th... more In this paper, nanostructured perovskite-type LnFeO 3 (Ln = Nd, Sm) oxides were synthesized by thermal treatment method (TTM). Characterization analysis conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-Raman spectroscopy, have confirmed the perovskite structure of the synthesized nanomaterials. To study the effects of Nd and Sm lanthanides substitution at the A-site on the chemical sensing performance, conductometric and electrochemical sensors based on the synthesized LnFeO 3 samples were fabricated. LnFeO 3-based conductometric and electrochemical sensors were tested for acetone and dopamine sensing, respectively. The data revealed that Nd and Sm in the A-position lead to a significant influence in the gas sensing and electrochemical properties of perovskite LnFeO 3 samples. In particular, it has been demonstrated the good gas sensing characteristics of SmFeO 3 for acetone gas (Response = R/R 0 = 8.3-20 ppm acetone at 200°C), whereas NdFeO 3 displayed better performance as electrode for the electrochemical detection of dopamine reaching a low detection limit (LOD) of 270 nM at S/N = 3. The electrical and electrochemical characteristics of the perovskite LnFeO 3 samples were discussed in detail with respect to their chemical composition and microstructure.
Journal of Photochemistry and Photobiology A-chemistry, Dec 1, 2019
Abstract Through a thermal treatment method, LiFe5O8 nanoparticles are prepared and by using situ... more Abstract Through a thermal treatment method, LiFe5O8 nanoparticles are prepared and by using situ polymerization method, reduced graphene oxide/lithium ferrite (RGO/LiFe5O8) nanocomposites with the ratios of 0.15, 0.20 and 0.25 are created. The structural and physical properties of prepared samples are analyzed by different techniques. By using degradation of methylene blue (MB), photocatalytic activity is investigated under visible light. The combination of LiFe5O8 nanoparticles with RGO causes the enhancement of photocatalytic activity in same conditions. Moreover, after five recycles, photocatalytic activity of RGO/LiFe5O8 does not change as compared to the photocatalytic activity of fresh catalyst, indicating the stability and reusability of RGO/LiFe5O8. Additionally, the antibacterial characteristics of studied samples were investigated against Staphylococcus aureus (S. aureus) as Gram- positive bacteria and Escherichia coli (E. coli) as a Gram- negative bacteria with inhibition zone and colony counting methods. According to obtained results, the pure LiFe5O8 do not have any antibacterial effect on S. aureus, and E. coli. RGO/LiFe5O8 nanocomposites with the maximum concentration of RGO have a greater antibacterial effect on S. aureus, and E. coli than LiFe5O8 nanoparticles and RGO/LiFe5O8 nanocomposites with lower RGO ratios.
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Journal of Magnetism and Magnetic Materials, Jul 1, 2011
... Acknowledgment The authors would like to thank Miss. Fatemeh Moazami Goodarzi for her great a... more ... Acknowledgment The authors would like to thank Miss. Fatemeh Moazami Goodarzi for her great assistance in the chemical mechanism study. ... [8] J. Amighian, M. Mozaffari, B. Nasr, Preparation of nano-sized manganese ferrite (MnFe2O4) via coprecipitation method, Phys. ...
ABSTRACT Cobalt ferrite nanocrystals were prepared from an aqueous solution containing metal nitr... more ABSTRACT Cobalt ferrite nanocrystals were prepared from an aqueous solution containing metal nitrates and various of concentrations of poly(vinyl pyrrolidone), followed by calcinations temperature. X-ray diffraction (XRD) analysis was performed to determine the degree of crystallinity of the ferrite nanoparticles. By transmission electron microscopy (TEM), the morphology and average particle size of the cobalt ferrite nanoparticles were evaluated which had good agreement with XRD results. Fourier transform infrared spectroscopy (FT-IR) suggested the presence of metal oxide bands in all samples as well as the effective elimination of organic constituents after calcinations. Vibrating sample magnetometer (VSM), was utilized to evaluate the magnetic properties of the cobalt ferrite nanoparticles.
Analytical and Bioanalytical Chemistry, Jul 8, 2019
A new electrochemical sensor, based on NdFeO 3 nanoparticles as electrocatalytic material, was pr... more A new electrochemical sensor, based on NdFeO 3 nanoparticles as electrocatalytic material, was proposed here for the detection of dopamine (DA). NdFeO 3 nanoparticles were first synthesized by a simple thermal treatment method and subsequent annealing at high temperature (700°C). The prepared electrocatalytic material has been characterized in detail by SEM-EDX, XRD, and Raman techniques. Characterization results display its sheet-like morphology, constituted by a porous network of very small orthorhombic NdFeO 3 nanoparticles. NdFeO 3 electrocatalytic material was then used to modify the working electrode of screen-printed carbon electrodes (SPCEs). Electrochemical tests demonstrated that NdFeO 3modified screen-printed carbon electrode (NdFeO 3 /SPCE) exhibited a remarkable enhancement of the dopamine electrooxidation, compared to the bare SPCE one. The analytical performance of the developed sensor has been evaluated for the detection of this analyte by means of the square-wave voltammetry (SWV) technique. The modified electrode showed two linear concentration ranges, from 0.5 to 100 μM and 150 to 400 μM, respectively, a limit of detection (LOD) of 0.27 μM (at S/N = 3), and good reproducibility, stability, and selectivity. Additionally, we also report an attempt made to propose the modified sensor for the simultaneous detection of dopamine and uric acid (UA). The procedure was also applied for the determination of dopamine in spiked real samples. So, this paper reports for the first time the use of a modified NdFeO 3 screen-printed electrode for developing an electrochemical sensor for the quantification of important biomolecules.
The surface plasmon resonance sensor was used to detect and measure low concentrations of sugar. ... more The surface plasmon resonance sensor was used to detect and measure low concentrations of sugar. A polypyrrole-chitosan-BaFe 2 O 4 nanocomposite layer was prepared to improve the surface of the gold layer for the detection of glucose, fructose, and sucrose using the surface plasmon resonance technique. The polypyrrole-chitosan-BaFe 2 O 4 was synthesized using the electrodeposition method in different thicknesses. The functional group, crystal structure, and morphology of the layer were investigated with Fourier transform infrared spectroscopy, X-ray diffraction technique, and field emission electron microscopy. Consequently, the BaFe 2 O 4 was scattered on the surface of the polymer, and the affinity of polypyrrole-chitosan-BaFe 2 O 4 to bond with glucose is higher than that for the other sugars. The sensor limit was 0.005 ppm.
LaFeO3 nanoparticles were synthesized by different chemical procedures, i.e., microwave-thermal t... more LaFeO3 nanoparticles were synthesized by different chemical procedures, i.e., microwave-thermal treatment method (MTTM), hydrothermal method (HTM) and sol–gel method (SGM), by using metal nitrates as La- and Fe-precursors. The synthesized nanoparticles were calcined at various temperature from 450°C to 1000°C. SEM analysis of samples synthesized by MTTM and SGM highlighted the formation of uniform spherical-like nanoparticles while those obtained by HTM were a combination of spherical particles and nanorods. X-ray diffraction patterns of nanocrystals confirmed that these nanoparticles are formed by crystalline LaFeO3 in the orthorhombic structure. The synthesized LaFeO3 were further investigated for analyzing their optical, magnetic and gas sensing behaviors. Band gap values for LaFeO3 by MTTM and HTM were in the range 2.07–2.41 eV and 1.57–1.94 eV, respectively, for the samples annealed at growing temperature, whereas vibrating sample magnetometer analysis demonstrated their weak ferromagnetic behavior. LaFeO3 synthesized by SGM showed interesting sensing properties for monitoring O2 and ethanol in ambient air.
Journal of Inorganic and Organometallic Polymers and Materials, Jul 26, 2020
In this project, Calcium ferrite/polyvinyl alcohol (CaFe 2 O 4 @PVA) nanocarriers were prepared b... more In this project, Calcium ferrite/polyvinyl alcohol (CaFe 2 O 4 @PVA) nanocarriers were prepared by a thermal-treatment method at three different temperatures (773, 823 and 923 K). The nanocarriers were used as drug delivery systems (DDS) to deliver curcumin (CUR) and were utilized as a new structure for photo dynamic therapy (PDT). Drug loading and release study of CUR were performed and it was observed that nanocarriers showed a pH dependent drug release behavior. MTT assay, Hemolysis assay and lethal dose test were applied to determine the cytotoxicity of nanocarriers. These tests indicated that synthesized nanocarriers can be considered as nontoxic. Also, the photodynamic therapy experiments were performed by two groups: one group of cells were treated by different concentrations of nanocarriers without light and the other group were exposed to light. Then, the efficacy of PDT was determined by MTT and it was revealed that whenever nanocarriers were exposed to light the cytotoxicity was significantly high. Therefore, it was revealed that these nanocarriers are suitable to be utilized as a drug delivery systems and photo dynamic therapy agent.
Journal of Magnetism and Magnetic Materials, Oct 1, 2015
Cite this article as: Mahmoud Naseri, Optical and magnetic properties of monophasic cadmium ferri... more Cite this article as: Mahmoud Naseri, Optical and magnetic properties of monophasic cadmium ferrite (CdFe 2 O 4) nanostructure prepared by thermal treatment method,
A polypyrrole-chitosan/nickel ferrite nanoparticle composite layer was prepared using the electro... more A polypyrrole-chitosan/nickel ferrite nanoparticle composite layer was prepared using the electrochemical method to detect nickel, iron, cobalt, aluminium, manganese, mercury, and lead ions. The polypyrrole-chitosan/nickel ferrite nanoparticle composite layers were characterized using field emission electron microscopy, energy dispersive spectroscopy, and X-ray diffraction spectroscopy. The polymer composite was used to improve the surface of the gold layer to apply the surface plasmon resonance technique. The sensor detected the ferromagnetic ions down to a level of 0.001 ppm, and the detection of diamagnetic ions was conducted with a limitation of roughly 0.5 ppm. The polymer composite improved the response time of the sensor better than the other polymer composite sensing layers did.
... 2767-2772. [11] RK Selvan, CO Augustin, LJ Berchmans, and R. Saraswathi, “Combustion synthesi... more ... 2767-2772. [11] RK Selvan, CO Augustin, LJ Berchmans, and R. Saraswathi, “Combustion synthesis of CuFe2O4,” Mater. ... [19] MK shobana,V. Rajendran, K. Jeyasubramanian, and NS Kumar, “Preparation and characterisation of NiCo ferrite nanoparticles,” Mater. Lettvol, vol. ...
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