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1
Abraham, Kevin, A. K. Thomas, Jini Thomas, and K. V. Saban. "Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites." Modern Electronic Materials 5, no. (4) (2019): 145–50. https://doi.org/10.3897/j.moem.5.46694.
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The composite materials of 0.5 Sm<sub>1.5</sub>Sr<sub>0.5</sub>NiO<sub>4</sub>, 0.5 CCTO and 0.75 Sm<sub>1.5</sub>Sr<sub>0.5</sub>NiO<sub>4,</sub> 0.25 CCTO mixtures were prepared through the conventional solid state reaction in an attempt to obtain good dielectric properties for practical applications. The structural properties were determined by powder X-ray diffraction and single phases were obtained for Sm<sub>1.5</sub>Sr<sub>0.5</sub>NiO<sub>4</sub> and CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub> compounds. The dielectric studies analysed over a range of frequencies (100 KHz–10 MHz) and temperatures (30 to 200 °C) revealed a desired dielectric constant values with a low steady nature of dielectric loss factor. Through impedance spectroscopy, the attained dielectric behaviour was due to the highly insulating grain boundaries at lower frequencies and semiconducting grains at higher frequencies.
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Bharathi, M., K. N. Anuradha, and M. V. Murugendrappa. "Structural, AC conductivity, dielectric and impedance studies of polypyrrole/praseodymium calcium manganite nanocomposites." Digest Journal of Nanomaterials and Biostructures 18, no. 1 (2023): 343–65. http://dx.doi.org/10.15251/djnb.2023.181.343.
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In-situ polymerization of a series of nanocomposites viz. 10, 20, 30, 40 and 50 wt % of Praseodymium Calcium Manganite Oxide (Pr0.75Ca0.25MnO3) (PCM) nano manganites in polypyrrole (PPy) were prepared by chemical polymerization technique. The crystalline nature of all the nanocomposites was confirmed by powder X-ray diffraction (XRD). The orthorhombic structure with space group Pnma was confirmed by the well-fitted Rietveld refined XRD data. The average particle size was observed to be in the range of 42 to 60 nm. Scanning Electron Microscope (SEM) confirmed the spherical nature of the particles. The TEM confirmed the crystallinity and Fourier Transform Infra-Red Spectroscopy (FTIR) showed that the stretching frequencies shifted towards higher frequencies for the nanocomposites suggesting better conjugation due to chemical interaction between the PPy and PCM particles. AC conductivity versus frequency showed that at higher frequencies the AC increases obeying Jonscher’s power law. The correlated barrier hopping (CBH) model is therefore used to describe the conduction mechanism. For all composites, the dielectric constant and tangent loss revealed a frequency- and temperaturedependent character. The real and imaginary impedance were both frequency and temperature dependent. The impedance data were analyzed by fitting Nyquist plots using ZsimpWin software which confirmed non Debye type of behavior. This study highlights on the interactions between conduction processes, grain boundaries, and grains.
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Syed, Asad, Ashoka Siddaramanna, Abdallah M. Elgorban, D. A. Hakeem, and G. Nagaraju. "Hydrogen Peroxide-Assisted Hydrothermal Synthesis of BiFeO3 Microspheres and Their Dielectric Behavior." Magnetochemistry 6, no. 3 (2020): 42. http://dx.doi.org/10.3390/magnetochemistry6030042.
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Despite considerable efforts undertaken in a rapidly developing area of multiferroic research, synthesis of phase pure BiFeO3 is still a matter of intensive research. In this work, we report the shape-controlled synthesis of pure BiFeO3 microspheres via a facile hydrothermal route. The prepared BiFeO3 powder has been characterized using powder X-ray Diffraction (XRD), Differential Thermal analysis (DTA), Scanning Electron microscopy (SEM), and impedance spectroscopy. Powder XRD analysis confirms the formation of pure rhombohedrally distorted perovskite with R3c space group. Scanning electron micrograph revealed that the prepared BiFeO3 microspheres are nearly spherical in shape with uniform size distribution. The BiFeO3 microspheres exhibit a dielectric constant value of ~110 at 1000 KHz, which is higher than the BiFeO3 prepared by conventional solid-state reaction and sol–gel method. Variation of dielectric constant with temperature at different frequencies shows that the BiFeO3 has a dielectric anomaly of ferroelectric to paraelectric type at 1093 K and this phenomenon is well supported by TGA results.
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Abraham, Kevin, A. K. Thomas, Jini Thomas, and K. V. Saban. "Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites." Modern Electronic Materials 5, no. 4 (2019): 145–50. http://dx.doi.org/10.3897/j.moem.5.4.46694.
Full textAbstract:
The composite materials of 0.5 Sm1.5Sr0.5NiO4, 0.5 CCTO and 0.75 Sm1.5Sr0.5NiO4, 0.25 CCTO mixtures were prepared through the conventional solid state reaction in an attempt to obtain good dielectric properties for practical applications. The structural properties were determined by powder X-ray diffraction and single phases were obtained for Sm1.5Sr0.5NiO4 and CaCu3Ti4O12 compounds. The dielectric studies analysed over a range of frequencies (100 KHz–10 MHz) and temperatures (30 to 200 °C) revealed a desired dielectric constant values with a low steady nature of dielectric loss factor. Through impedance spectroscopy, the attained dielectric behaviour was due to the highly insulating grain boundaries at lower frequencies and semiconducting grains at higher frequencies.
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Abraham, Kevin, A. K. Thomas, Jini Thomas, and K. V. Saban. "Steady nature of dielectric behaviour in Sm1.5Sr0.5NiO4 – CCTO composites." Modern Electronic Materials 5, no. 4 (2019): 145–50. http://dx.doi.org/10.3897/j.moem.5.46694.
Full textAbstract:
The composite materials of 0.5 Sm1.5Sr0.5NiO4, 0.5 CCTO and 0.75 Sm1.5Sr0.5NiO4, 0.25 CCTO mixtures were prepared through the conventional solid state reaction in an attempt to obtain good dielectric properties for practical applications. The structural properties were determined by powder X-ray diffraction and single phases were obtained for Sm1.5Sr0.5NiO4 and CaCu3Ti4O12 compounds. The dielectric studies analysed over a range of frequencies (100 KHz–10 MHz) and temperatures (30 to 200 °C) revealed a desired dielectric constant values with a low steady nature of dielectric loss factor. Through impedance spectroscopy, the attained dielectric behaviour was due to the highly insulating grain boundaries at lower frequencies and semiconducting grains at higher frequencies.
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Manzoor, M. Z., Z. Batool, Y. Ali, et al. "Sol-gel synthesis of topological insulator bismuth selenide nanoparticles by using different solvents." Digest Journal of Nanomaterials and Biostructures 17, no. 2 (2022): 649–59. http://dx.doi.org/10.15251/djnb.2022.172.649.
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This paper reports about the Sol-Gel synthesis of Bismuth Selenide (Bi2Se3) nanoparticles by using different solvents (DMF, Ethanol and (DMF+Ethanol)) for their potential in topological insulators. Various characterization techniques: X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), photoluminescence (PL), and scanning electron microscope (SEM) were used to characterize the nano-powder. To get valuable information about dielectric behavior, AC impedance and conductivity were studied. The XRD measurements of Bismuth Selenide proved the crystalline form and orthorhombic crystal structure. The grain size (G) of Bismuth Selenide prepared in different solvents e.g., DMF, Ethanol, DMF+ Ethanol were calculated at 68 nm, 78 nm, and 84 nm respectively. FTIR study showed that the wavenumber corresponding to 660-800cm-1 represents the vibrational bands of Bismuth Selenide (Bi2Se3). Photoluminescence analysis revealed that the maximum absorption was at 801 nm and the bandgap was approximately 1.7eV for all the solvents. The surface morphology of the synthesized Bismuth Selenide (Bi2Se3) was studied with the help of a scanning electron microscope (SEM). The dielectric study showed the frequency effect on dielectric constant (έ), dielectric loss (Ɛ"), tangent loss (tanδ), impedance (Z), and AC conductivity.
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Lisińska-Czekaj, Agata, Joanna Micior, Małgorzata Adamczyk, and Dionizy Czekaj. "Dielectric Properties of BiNbO4-Based Ceramic-Polymer Composites with 0-3 Connectivity." Key Engineering Materials 602-603 (March 2014): 723–27. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.723.
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In the present study two-phase BiNbO4//PVDF composites with 0-3 connectivity were studied by impedance spectroscopy within the frequency range Δν=100Hz-1MHz at room temperature. Polyvinylidene fluoride (PVDF) acted as a matrix whereas bismuth niobate (BiNbO4) powder acted as a dispersed phase. The volume fraction of the ceramic phase was cV=2, 4, 6, 8, 10, 16 and 20vol%. Analysis of the impedance data registered for composites as well as for BiNbO4 ceramics and PVDF polymer was performed on the base of complex dielectric permittivity mathematical formalism. It was found by impedance spectroscopy that concentration of the dispersed phase had an effect on dielectric properties of ceramic-polymer composite. Experimental data of impedance spectroscopy were fitted to the corresponding equivalent circuit using the complex non-linear least squares method. An equivalent electric circuit consisting of a series combination of two parallel combinations of a resistance R and a constant phase element CPE was found to describe well the dynamic dielectric response of the objects under study. Parameters of the equivalent electric circuit were calculated and it was found that two distinct relaxation processes were present in the composite samples. It was also found that volume fraction of the dispersed phase cV=8vol% corresponded to a local minimum of resistance whereas cV=10vol% of the dispersed phase corresponded to a local minimum of capacitance.
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Winie, Tan, Asheila Jamal, Nur Shazlinda Muhammad Hanif, and N. S. M. Shahril. "Hexanoyl Chitosan-Polystyrene Blend Based Composite Polymer Electrolyte with Surface Treated TiO2 Fillers." Key Engineering Materials 594-595 (December 2013): 656–60. http://dx.doi.org/10.4028/www.scientific.net/kem.594-595.656.
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Composite polymer electrolytes (CPEs) comprised of hexanoyl chitosan-polystyrene-LiCF3SO3-TiO2 were prepared by solution casting technique. The TiO2 fillers were treated with 4% sulphuric acid (H2SO4) aqueous solution. The effect of treated TiO2 on the structural and electrical behaviour of the prepared electrolyte systems was investigated by X-ray diffraction (XRD) and impedance spectroscopy, respectively. Addition of TiO2 decreases the crystallinity of the electrolytes. Ac conductivity was calculated from σ(ω) = εoεrωtanδ. It is found that at all frequencies, σ(ω) increases with increasing temperature. Dielectric constant decreases with increasing frequency and increases with increasing temperature.
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Baivier, Clara, Imen Hammami, Ratiba Benzerga, Manuel P. F. Graça, and Luís C. Costa. "Barium Titanate/Gadolinium Ferrite: A New Material Composite to Store Energy." Nanomaterials 13, no. 13 (2023): 1955. http://dx.doi.org/10.3390/nano13131955.
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This work investigates the dielectric properties of barium titanate/gadolinium ferrite ceramic composites, with different concentrations of each material. Our objective was to increase the storage ability of this material, finding a compromise between high permittivity and low dielectric losses. A two-step sintering procedure was used in the preparation of the composites to attain the desired results. Their morphological, structural and electrical properties were tested using scanning electron microscopy, X-Ray powder diffraction and impedance spectroscopy, respectively. Dielectric characterizations were performed on the frequency band of 100 Hz–1 MHz and for different temperatures (180–380 K). The best compromise between barium titanate and gadolinium ferrite in the composition was calculated in order to obtain a potential material for electrical energy storage. The sample with 25% gadolinium ferrite presented the best results. The dielectric constant reached values of the order of 2000, at 1 kHz and 340 K. It was also important not to have very high losses, and this was confirmed by the calculated loss tangent.
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Sultan, M. Tipu, Md Arifur Rahman, Jahid M. M. Islam, et al. "Preparation and Characterization of an Alginate/Clay Nanocomposite for Optoelectronic Application." Advanced Materials Research 123-125 (August 2010): 751–54. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.751.
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Sodium Alginate/bentonite clay composites of different compositions were prepared by solution casting method. The electrical properties (Conductivity, Dielectric constant) of the composites were investigated by standard methods with Impedance Analyzer. The electrical properties were found to improve with the incorporation of bentonite clay. The thermal, physical and mechanical properties of sodium alginate/bentonite clay composite were investigated by Thermo-Mechanical Analyzer (TMA), X-ray Deffraction (XRD), and Universal Testing Machine respectively. . Tensile Strength (TS) and Elongation at break (Eb) of 2% clay containing composite film were found to be 7.6 MPa and 55% respectively. The XRD demonstrates the enhancing crystallinity of sodium alginate/bentonite clay composite with the increasing clay content. TMA results showed a higher thermal stability in the composite. Water absorption properties of the sodium alginate/clay composite were studied and found to decrease with the increase of clay content. . The inter action between sodium alginate and bentonite clay were studied by Fourier transform infrared spectroscopy (FT-IR). All of the results indicate that the developed composite is promising for use in a wide variety of optoelectronic applications.
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Hadi, Nasr, Farid Abdi, Taj-edine Lamcharfi, Abdesselam Belaaraj, Said Kassou, and Fatimazahra Ahjyaje. "Study of the dielectric, optical and microstructure properties of CaCu3Ti4O12–PbZr0.48Ti0.52O3 ceramic system with different compositions." Mediterranean Journal of Chemistry 8, no. 3 (2019): 245. http://dx.doi.org/10.13171/10.13171/mjc8319052212nh.
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<p class="Abstract"><span lang="EN-US">In this paper, composite ceramics (1-x)CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>–(x)PbZr<sub>0.48</sub>Ti<sub>0.52</sub>O<sub>3</sub> (with x =0.00, 0.50 and 1.00), denoted CCTO-PZT, were prepared by a three-stages modified method, in order to achieve high dielectric constant and low loss. Structural investigations carried out by X-ray diffraction (XRD), and FT-IR spectroscopy showed the formation of pure cubic and tetragonal phases for x = 0.00 and x=1.00 compositions, respectively. XRD showed the coexistence of both phases in the CCTO-PZT composite. The morphology of the ceramics was examined by scanning electron micrograph (SEM), results reveal a homogeneous microstructure with two types of grains corresponding to PZT (smaller grains) and CCTO (large grains). Dielectric measurements carried out by an impedance analyzer; show that the dielectric constant of the CCTO-PZT composite is higher than the pure samples (CCTO and PZT) one. The temperature dependence of the ac conductivity indicated that the conduction follows the Arrhenius law and the conduction process is due to the single and the doubly ionized. The optical band gap of the PZT is 2.25 eV, and the band gap decreased in the CCTO/PZT composite.</span></p>
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Hadi, Nasr, Farid Abdi, Taj-edine Lamcharfi, Abdesselam Belaaraj, Said Kassou, and Fatimazahra Ahjyaje. "Study of the dielectric, optical and microstructure properties of CaCu3Ti4O12–PbZr0.48Ti0.52O3 ceramic system with different compositions." Mediterranean Journal of Chemistry 8, no. 3 (2019): 245. http://dx.doi.org/10.13171/mjc8319052212nh.
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<p class="Abstract"><span lang="EN-US">In this paper, composite ceramics (1-x)CaCu<sub>3</sub>Ti<sub>4</sub>O<sub>12</sub>–(x)PbZr<sub>0.48</sub>Ti<sub>0.52</sub>O<sub>3</sub> (with x =0.00, 0.50 and 1.00), denoted CCTO-PZT, were prepared by a three-stages modified method, in order to achieve high dielectric constant and low loss. Structural investigations carried out by X-ray diffraction (XRD), and FT-IR spectroscopy showed the formation of pure cubic and tetragonal phases for x = 0.00 and x=1.00 compositions, respectively. XRD showed the coexistence of both phases in the CCTO-PZT composite. The morphology of the ceramics was examined by scanning electron micrograph (SEM), results reveal a homogeneous microstructure with two types of grains corresponding to PZT (smaller grains) and CCTO (large grains). Dielectric measurements carried out by an impedance analyzer; show that the dielectric constant of the CCTO-PZT composite is higher than the pure samples (CCTO and PZT) one. The temperature dependence of the ac conductivity indicated that the conduction follows the Arrhenius law and the conduction process is due to the single and the doubly ionized. The optical band gap of the PZT is 2.25 eV, and the band gap decreased in the CCTO/PZT composite.</span></p>
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Salih, Ethar Y., Zulkifly Abbas, Samer Hasan Hussein Al Ali, and Mohd Zobir Hussein. "Dielectric Behaviour of Zn/Al-NO3LDHs Filled with Polyvinyl Chloride Composite at Low Microwave Frequencies." Advances in Materials Science and Engineering 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/647120.
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Recently, researchers have shown great interest in improving the thermal, mechanical, dielectric, and microwave properties of pure polymers through the use of polymer-based composites. The essential properties of polymer-based composites can be modified by varying the amount of Zn/Al-NO3layered double hydroxide (LDH) added to polyvinyl chloride (PVC). Therefore, by determining the optimal ratio of LDH in the PVC matrix, the dielectric properties of PVC-LDH composites can be improved. An LDH was prepared using the coprecipitation method, while PVC-LDH composites were prepared using tetrahydrofuran (THF) as the solvent. The composites were characterised using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM), and room temperature dielectric measurements were investigated using an RF Impedance/Material Analyzer (Agilent 4291). The results confirmed that the prepared composites were pure. Additionally, the presence of LDH in the PVC matrix was verified. The dielectric measurements showed that an increase in the LDH concentration leads to an increase in the dielectric constant and the dielectric loss factor. When used as dielectric filler in the PVC matrix, the LDH improved the dielectric properties of the fabricated composites. The results indicate that these composites show great potential for use as microwave absorbers at low microwave frequencies.
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Atta, Ali, Mohammed F. Alotiby, Nuha Al-Harbi, Mohamed R. El-Aassar, Mohamed A. M. Uosif, and Mohamed Rabia. "Fabrication, Structural Properties, and Electrical Characterization of Polymer Nanocomposite Materials for Dielectric Applications." Polymers 15, no. 14 (2023): 3067. http://dx.doi.org/10.3390/polym15143067.
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This research paper aims to fabricate flexible PVA/Cs/TiO2 nanocomposite films consisting of polyvinyl alcohol (PVA), chitosan (Cs), and titanium oxide (TiO2) for application in energy storage devices. The samples were analyzed using X-ray diffraction (XRD), atomic force microscope (AFM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and energy dispersive X-ray (EDX) techniques. The impact of TiO2 on the electrical impedance, conductivity, permittivity, and energy efficiency of the PVA/Cs was determined in a frequency range of 100 Hz to 5 GHz. The XRD, FTIR, and EDX results showed the successful fabrications of the PVA/Cs/TiO2. The SEM and AFM images illustrated that the TiO2 was loaded and distributed homogenously in PVA/Cs chains. In addition, the electrical conductivity was enhanced from 0.04 × 10−7 S.cm−1 of PVA/Cs to 0.25 × 10−7 S.cm−1 and 5.75 × 10−7 S.cm−1, respectively, for the composite PVA/Cs/0.01TiO2 and PVA/Cs/0.1TiO2, and the dielectric constant grew from 2.46 for PVA/Cs to 7.38 and 11.93, respectively. These results revealed that modifications were made to the produced films, paving the way for using the composite PVA/Cs/TiO2 films in different energy applications, such as electronic circuits and supercapacitors.
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P., Sumithraj Premkumar. "Structural and electrical studies on zinc added magnesium oxide nanoparticles." Journal of Physical Science 31, no. 3 (2020): 73–86. http://dx.doi.org/10.21315/jps2020.31.3.6.
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Magnesium oxide (MgO, pure) and zinc added MgO nanoparticles were synthesised by a simple microwave assisted solvothermal method. The concentrations of impurity used in the present work were 0.25 M and 0.50 M. All samples were annealed at 400°C for 1 h to improve the ordering. The prepared pure and zinc added magnesium oxide nanoparticles were characterised by powder X-ray diffraction (PXRD), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). PXRD studies of pure and zinc added MgO nanoparticles showed that all samples belong to crystalline nature with cubic structure. The grain size of all samples were determined from the XRD results and it belongs to nano meter scale. The EDS confirmed the presence of zinc, magnesium and oxide elements in the respective prepared samples. The scanning electron microscope images confirmed that the prepared samples possess nanometer dimensions. The electrical properties such as AC conductivity, dielectric constant and dielectric loss were measured at different temperatures in the different frequency range by involving the impedance analyser of all the prepared samples.
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K., Lilly Mary Eucharista, Krishnan C., and Selvarajan P. "STRUCTURAL, MECHANICAL, OPTICAL, THERMAL, ELECTRICAL STUDIES OF A NONLINEAR OPTICAL SINGLE CRYSTAL: GAMMA GLYCINE USING LITHIUM BROMIDE AS AN ADDITIVE." International Journal of Advanced Trends in Engineering and Technology 2, no. 2 (2017): 60–70. https://doi.org/10.5281/zenodo.846411.
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Single crystals of gamma glycine, an organic nonlinear optical material were grown by slow evaporation method from aqueous solutions of lithium bromide. Good optical quality single crystals were grown within a period of 3 weeks. The grown crystals were colorless and transparent. The solubility of the grown crystals has been estimated for various temperatures. The XRD study reveals that the grown crystal crystallizes in the hexagonal crystal system and corresponding lattice parameters were determined.The reflection planes of the sample were confirmed by the powder X-ray diffraction study and diffraction peaks were indexed. Fourier transform infrared (FTIR) study was used to confirm the presence of various functional groups in the grown crystal. The optical spectral analysis of the grown crystal has been performed by UV-Vis-NIR spectroscopy and the band gap energy was found out.Second harmonic generation (SHG) for the materials of this work was confirmed using Nd:YAG laser. The thermal stability of the crystal was studied by thermo gravimetric analysis (TGA) and differential thermal analysis (DTA).The dielectric constant and the dielectric loss were measured for varying frequencies under different temperatures. The impedance measurements were performed as a function of temperature.
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Ahmed, Khalil, Farah Kanwal, Shahid Ramay, et al. "Synthesis and Characterization of BaTiO3/Polypyrrole Composites with Exceptional Dielectric Behaviour." Polymers 10, no. 11 (2018): 1273. http://dx.doi.org/10.3390/polym10111273.
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Higher concentrations of ceramic fillers induce brittleness in the ceramic/polymer hybrids which restrict their applications to limited fields especially when such hybrids are prepared for their use as dielectrics. We have synthesized and characterized different BaTiO3-polypyrrole (PPy) composites by changing the concentration of BaTiO3 from 1% by weight of PPy taken to 5 wt % to explore its effect on the dielectric parameters of the final product and found that the BaTiO3-polypyrrole composite with weight ratio of 0.05:1 exhibited highest dielectric constant, lowest dielectric loss and thermally most stable. All the composites were prepared using in-situ polymerization of pyrrole in an aqueous dispersion of low content of BaTiO3 in the presence of small amount of Hydrochloric acid. These composites were characterized for their microstructure and crystallinity by X-ray diffractometer (XRD), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM) while thermal stability by thermo gravimetric (TGA) analysis. An impedance analyser (LCR meter) was utilized to investigate the dielectric parameters. FT-IR data confirmed the presence of the two phases and their interaction, inferred from the shifting of normal PPy peaks. The data obtained from XRD confirmed the presence of crystallites of 2.8 to 5 nm with dominant crystallinity of the filler, TGA analysis (25 to 600 °C) confirmed the higher thermal stability induced on successive addition of the filler into the prepared composites as compared to that of pure PPy in a wide temperature range which is unusual for such a low % age addition of the filler. The SEM analysis together with XRD results reveal that the successive introduction of BaTiO3 particles produced crystallites of 2 to 5 nm size which bonded together and changed the hemispherical shaped larger grains of the matrix to regular shaped smaller grains. The dielectric constant of the composites was enhanced with filler contents from 178 to 522 at 1 MHz for 1 wt % and 5 wt % BaTiO3 respectively. It was concluded that the introduction of BaTiO3 into the polymer matrix with this new procedure has greatly affected the polymerization process, thermal stability, morphology and dielectric properties of the host matrix and has resulted in a novel series of the composites which may have broad applications.
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Jung, Eunyoung, Choon-Sang Park, Taeeun Hong, and Heung-Sik Tae. "Structure and Dielectric Properties of Poly(vinylidenefluoride-co-trifluoroethylene) Copolymer Thin Films Using Atmospheric Pressure Plasma Deposition for Piezoelectric Nanogenerator." Nanomaterials 13, no. 10 (2023): 1698. http://dx.doi.org/10.3390/nano13101698.
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This study investigates the structural phase and dielectric properties of poly(vinylidenefluoride-co-trifluoroethylene) (P[VDF–TrFE]) thin films grown via atmospheric pressure (AP) plasma deposition using a mixed polymer solution comprising P[VDF–TrFE] polymer nano powder and dimethylformamide (DMF) liquid solvent. The length of the glass guide tube of the AP plasma deposition system is an important parameter in producing intense cloud-like plasma from the vaporization of DMF liquid solvent containing polymer nano powder. This intense cloud-like plasma for polymer deposition is observed in a glass guide tube of length 80 mm greater than the conventional case, thus uniformly depositing the P[VDF–TrFE] thin film with a thickness of 3 μm. The P[VDF–TrFE] thin films with excellent β-phase structural properties were coated under the optimum conditions at room temperature for 1 h. However, the P[VDF–TrFE] thin film had a very high DMF solvent component. The post-heating treatment was then performed on a hotplate in air for 3 h at post-heating temperatures of 140 °C, 160 °C, and 180 °C to remove DMF solvent and obtain pure piezoelectric P[VDF–TrFE] thin films. The optimal conditions for removing the DMF solvent while maintaining the β phases were also examined. The post-heated P[VDF–TrFE] thin films at 160 °C had a smooth surface with nanoparticles and crystalline peaks of β phases, as confirmed by the Fourier transform infrared spectroscopy and XRD analysis. The dielectric constant of the post-heated P[VDF–TrFE] thin film was measured to be 30 using an impedance analyzer at 10 kHz and is expected to be applied to electronic devices such as low-frequency piezoelectric nanogenerators.
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Nikolic, Maria Vesna, Souad Ammar-Merah, Nikola Ilić, Charanjeet Singh, Milena P. Dojcinovic, and Rajshree B. Jotania. "Ferroelectric, Magnetic and Dielectric Properties of SrCo0.2Zn0.2Fe11.6O18.8 Hexaferrite Obtained by “One-Pot” Green Sol-Gel Synthesis Utilizing Citrus reticulata Peel Extract." Crystals 13, no. 10 (2023): 1452. http://dx.doi.org/10.3390/cryst13101452.
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SrCo0.2Zn0.2Fe11.6O18.8 hexaferrite was obtained by a “one-pot” green sol-gel synthesis method utilizing aqueous mandarin orange (Citrus reticulata) peel extract as an eco-friendly reactant. The research objective was to analyze the influence of cobalt and zinc co-doping and the synthesis process on the structure, morphology, magnetic, dielectric and ferroelectric properties of strontium hexaferrite in view of future applications. Structural and morphological characterization using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy coupled to energy dispersive X-ray spectrometry (SEM-EDX) confirmed the formation of a Co and Zn ion incorporated M-type magnetoplumbite with c/a lattice parameter ratio of 3.919 as crystallite nanoplatelets of 32 and 53 nm in thickness and width, respectively. The magnetic hysteresis loop of the synthesized powder recorded by a vibrating sample magnetometer (VSM) at room temperature confirmed its ferromagnetic nature with a coercive field (Hc) of 2539 Oe and a saturation magnetization (Ms) and remanent magnetization (Mr) of 44.6 emu/g and 21.4 emu/g, respectively. Room temperature ferroelectric loops measured at 100 Hz showed a maximal (Pmax) and a remanent (Pr) polarization of 195.4 and 31.0 nC/cm2, respectively. Both increased when the magnitude of the applied electrical field increased in the 1–24 kV/cm range. The dielectric constant decreased with the frequency increase, in accordance with the Maxwell–Wagner model, while the conductivity changed according to the Jonscher power law. The complex impedance was modeled with an equivalent circuit, enabling identification of the dominant contribution of grain boundary resistance (272.3 MΩ) and capacitance (7.16 pF).
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Assekouri, Abdelmonim, Fatima Zahra Bouragba, Redouane Lahkale, Halima Mortadi, and Elmouloudi Sabbar. "Improvement of optical, dielectric and mechanical properties of a new nanocomposite based on polyvinyl alcohol and layered double hydroxide." Journal of Composite Materials, June 17, 2022, 002199832211093. http://dx.doi.org/10.1177/00219983221109330.
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In this work, films in the form of poly (vinyl alcohol)/Layered Double Hydroxide (PVA/LDH) nanocomposites were synthesized with different amount of LDH (0%; 4% and 6%), and characterized by X-ray diffraction (XRD), infrared spectroscopy scanning electron microscopy (SEM), impedance spectroscopy and UV-Vis-NIR spectroscopy. Different characterizations were used to investigate the electrical/dielectric, optical and mechanical properties of the nanocomposite films XRD and infrared spectroscopy results showed that clay particles exist in the polymer matrix. Electrical modeling was established using an equivalent electrical circuit consisting of two blocks, and confirmed by fitting the experimental conductivity data according to Jonscher’s double power law. Moreover, the reinforcement of the composite matrix by the addition of LDH particles, showed a shift of the relaxations towards the low frequencies, and led to an increase of dielectric constant, conductivity, and absorption of the light in the ultraviolet domain with a decrease of the gap energy. As for the mechanical properties, namely the Young’s modulus, is tripled when the clay content is about 6%.
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Sangeetha, A., B. M. Nagabhushana, Divyashree, Chaitra, and Netravathi. "Study of Structural and Dielectric Properties of Zirconium Titanate (ZrTiO<sub>4</sub>) Nano Powder." Journal of Mines, Metals and Fuels, May 24, 2024, 177–84. http://dx.doi.org/10.18311/jmmf/2023/43595.
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Zirconium Titanate nano powders synthesized by Polymeric Precursor Method using glycerin as a polymerizing agent were studied to investigate the effect of sintering temperature on structural and dielectric properties. From XRD reports, it is evident that phase formation is dependent on sintering temperature. UV-Visible Spectroscopy reveals that the band gap of the material depends on the structure that can be controlled by temperature. Variation of Dielectric constant (ε) and dielectric loss (tanδ) of the powders were measured for a wide range of frequency from 100Hz to 5MHz. Conductivity properties such as Conductivity and Impedance were studied for the above said frequency range.
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Prathap, N., R. Muthazhagan, R. Abinesh, P. Prabukanthan, K. Srinivasan, and K. Dinakaran. "Synthesis and Characterization of Mixed Metal Oxide Nanoparticles(Gd2O3/ZnO) Dispersedquinoline‐Based Benzoxazine‐Crosslinkedpolyaniline Matrix Having Enhanced Dielectric and Electromagnetic Interference Shielding Efficiency." Polymers for Advanced Technologies 36, no. 4 (2025). https://doi.org/10.1002/pat.70167.
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ABSTRACTGd2O3/ZnO‐loaded benzoxazine crosslinked polyaniline nanocomposites were successfully prepared by a thermal curing reaction and studied toward dielectric and electromagnetic interference shielding. Analytical methods such as powder X‐ray diffraction (P‐XRD), thermogravimetric analysis/differential thermal analysis (TGA/DTA), scanning electron microscopy (SEM), and energy‐dispersive X‐ray spectroscopy (EDX) were used to evaluate the polymer‐nanoparticle composite films. The XRD peaks indicated hexagonal wurtzite polycrystalline structure of ZnO and cubic phase of Gd2O3. QBZO/PANI has a dielectric constant of 4.7 × 106at 1 MHz, which is found to increase proportionately with the addition of Gd2O3/ZnO at concentrations of 1%, 3%, and 5%, reaching 9.2 × 106, 1.6 × 107, and 1.9 × 107 at 1 MHz, respectively. The QBZO/PANI/Gd2O3/ZnO (5w%) polymer nanocomposites electromagnetic interference protection rises to 45.3 dB at 11.7 GHz for the sample having 2 mm thickness.
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Qasim, Khaled Faisal, and Mahmoud Ahmed Mousa. "Physicochemical Properties of Oriented Crystalline Assembled Polyaniline/Metal Doped Li4Ti5O12 Composites for Li-ion Storage." Journal of Inorganic and Organometallic Polymers and Materials, June 6, 2023. http://dx.doi.org/10.1007/s10904-023-02720-x.
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AbstractIn this work, pure, doped Mg–, Mn–, and V-Li4Ti5O12, as well as polyaniline (PANI), and binary composites have been synthesized for supercapacitor applications. In situ, oxidation polymerization was used to create the nanocomposites. XRD, SEM, and XPS characterized the crystal structure, morphology, and compositions. The XRD analysis shows that all the pure and doped samples crystallize in the cubic spinel phase with a preferred orientation of the crystallites along the (111) direction, and the crystallite size has decreased with the addition of doping. The composites' SEM investigation revealed the production of LTO nanoparticles coated with PANI. The influence of dopant type on electrical and electrochemical characteristics was studied. The electrochemical performance is analyzed by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and impedance methods in a 1 M LiNO3 electrolyte solution, whereas their electrical conductivity and dielectric constant are measured by electric impedance spectroscopy. All samples showed conductivity and dielectric properties depending on the composition of the samples. The electrical conduction is enhanced by adding PANI to the pure and doped LTO samples. The electrochemical data obtained showed pseudo-capacitive behavior with a revisable charge/discharge property, and specific capacitance values lie between 58 and 202 F/g depending upon sample composition. The V-LTO@PANI demonstrates the highest performance among all the tested electrodes. The V-LTO@PANI electrode shows a specific capacitance of 202 F/g, a maximum energy density of 72.8 Wh/kg, a maximum power density of 2430 W/kg, and high cycling performance, with 82.6% capacitance retained over 3000 cycles at 1 A/g.
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Giriyappa Thimmaiah, Padma, Venkata Ramana Mudinepalli, Subba Rao Thota, Sreekanth Reddy Obireddy, and Wing-Fu Lai. "Preparation, Characterization and Dielectric Properties of Alginate-Based Composite Films Containing Lithium Silver Oxide Nanoparticles." Frontiers in Chemistry 9 (January 18, 2022). http://dx.doi.org/10.3389/fchem.2021.777079.
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Polymer composites have found applications in diverse areas, ranging from the manufacturing of portable electronic devices to the fabrication of bioactive agent carriers. This article reports the preparation of composite films consisting of sodium alginate (SA) and lithium silver oxide (LAO) nanoparticles. The films are generated by solution casting; whereas the nanoparticles are fabricated by using the hydrothermal method. The effects of the nanoparticles on the morphological, thermal, and dielectric properties of the films are examined by using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Electrical measurements are also performed to determine the dielectric constant (ε′), dielectric loss (ε″), AC conductivity (σac), electrical moduli (M′ and M″), and impedance (Z' and Z″). The composite films are shown to be crystalline in nature, with nanoparticles having a diameter of 30–45 nm effectively disseminated in the polymer matrix. They also display good dielectric properties. Our results suggest that the films warrant further exploration for possible use in microelectronic applications.
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Cao, Zikang, Yating Liu, Luqi Wang, et al. "COMPONENT OPTIMIZATION OF g-C3N4/TiO2 HETERO- STRUCTURE COMPOSITE AND ITS ACTIVITY ENHANCEMENT FOR PHOTOCATALYTIC DEGRADATION OF RHODAMINE B." Materiali in tehnologije 59, no. 1 (2025). https://doi.org/10.17222/mit.2024.1251.
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In this study, g-C3N4/TiO2 heterostructure composites were synthesized using sol–gel and hydrothermal methods. Through X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), the crystalline phase structure and chemical composition of the composite were confirmed. Scanning electron microscopy (SEM) revealed that the g-C3N4 sheets were uniformly dispersed on the block TiO2 particles. Ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis/DRS) indicated that the incorporation of g-C3N4 resulted in a narrowing of the forbidden bandwidths of the composites. Photoluminescence (PL) spectroscopy and electrochemical impedance spectroscopy (EIS) further demonstrated that the g-C3N4/TiO2 heterostructure effectively suppressed the recombination of photogenerated charge carriers. To evaluate the photocatalytic performance of g-C3N4/TiO2 heterojunction composites, different g-C3N4 loadings were tested for degradation of rhodamine B (RhB). The 7.62 w/% g-C3N4/TiO2 heterojunction composite exhibited the highest degradation efficiency for RhB dye, with a constant degradation rate that was twice as high as that of pure TiO2. Additionally, experiments on free radical trapping of the composite revealed the crucial role of hydroxyl radicals (·OH) and photogenerated holes (h+) in the RhB degradation. Moreover, the formation of a Z-scheme heterojunction between g-C3N4 and TiO2 was the main factor in further enhancing the degradation activity of the composite.
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Ibrahim, Bilal, Samia A. Saafan, R. E. El Shater, and Maha K. Omar. "Room temperature AC properties and impedance analysis of Mg ferrite/polypyrrole (PPy) and Mg ferrite/reduced graphene oxide (rGO) composites." Indian Journal of Physics, September 5, 2024. http://dx.doi.org/10.1007/s12648-024-03372-4.
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AbstractThe auto-combustion sol–gel method has been used to synthesize a powder sample of MgFe2O4 nanoparticles. Nanocomposites of Mg-ferrite/PPy and Mg-ferrite/rGO have been prepared by thorough physical mixing, with weight ratios of 20% PPy and 20% rGO, respectively. To have a full insight into the materials, their structural properties have been investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transform infrared spectroscopy (FT-IR). DC conductivity has been investigated too, and by comparing the results, it has been observed a significant increase in the DC conductivity of the Mg-ferrite/PPy composite sample compared to the corresponding Mg-ferrite/rGO sample, a finding that would potentially impact the composite’s applications. The discussion of the frequency dependence of ε′, σac, and tan(δ) in these composite samples revolves around the concept of Maxwell–Wagner interfacial polarization. The sample Cole–Cole plots show distinct areas where incomplete semicircles overlap, each representing a different conduction process. These semicircles correspond to two equivalent circuits of parallel resistor–capacitor (R–C) combinations connected in series. Finally, it could be concluded that the new nanocomposite samples of MgFe2O4/20% rGO and MgFe2O4/20% PPy show dielectric properties that may be a stimulus for more studies in future work, where they are expected to be promising candidates for supercapacitor applications.
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Al-Muntaser, A. A., Eman Alzahrani, Abdu Saeed, et al. "An insight into the role of titanium oxide nanofiller on the structural, optical, electrical, and dielectric characteristics of PS/PVK composite." Physica Scripta, June 13, 2023. http://dx.doi.org/10.1088/1402-4896/acde13.
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Abstract Nanocomposite films made of polystyrene (PS) and polyvinyl carbazole (PVK) and filled with varying quantities of titanium oxide (TiO2) nanoparticles (NPs) were prepared using the solution casting process. The TiO2 NPs' impact on the pure PS/PVK blend's structural, optical, and conductive properties was investigated and explained. X-ray diffraction (XRD) and Transmission electron microscopy (TEM) measurements indicate that the synthesized TiO2 NPs' size ranges between 12 and 32 nm and has a tetragonal anatase phase. The XRD scans also indicate that the PS/PVK filling with TiO2 NPs decreases the nanocomposite crystallinity. Fourier transform infrared (FTIR) analysis shows the main distinctive absorption peaks of PS and PVK, whose intensities changed randomly after filling. Moreover, the highest TiO2 NPs content showed a new peak at 449 cm-1. The UV/visible measurements showed that the optical energy gaps for the direct and indirect permitted transitions decreased as the TiO2 NPs content increased. Using impedance spectroscopy at room temperature, the AC electrical conductivity of the PS/PVK mixture containing TiO2 NPs was investigated over a broad frequency range from 10-1 to 107 Hz. It has been shown that the frequency dependence of AC electrical conductivity obeys Jonscher's rule, and the increase of TiO2 NPs concentration in the blend induces the formation of a percolating network within the composite. It has also been shown that the composite's dielectric loss and constant increase with nanoparticle concentration.
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Tian, Yulong, Wei Wang, Xin Wang, Jie Li, and Di Zhou. "Influence of V substitutions on sintering behaviors and microwave dielectric properties of Ba4LiNb3O12 ceramic." Journal of the American Ceramic Society, October 2024. http://dx.doi.org/10.1111/jace.20183.
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AbstractIn this study, a series of Ba4Li(Nb1‐xVx)3O12 (x = 0.05∼0.3) ceramics were synthesized using the solid‐state reaction method. X‐ray powder diffraction (XRD) analysis shows that the composite ceramics contain both Ba4LiNb3O12 and Ba3(VO4)2 phases, without any other phases present. The grains consist of Ba4LiNb3O12 and Ba3(VO4)2, as illustrated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Additionally, with the increase of V content, the grain size decreases, and the (microwave dielectric constant) decreases, the (resonant frequency temperature coefficient) value decreases, and the value increases (where = quality factor = 1 / dielectric loss, and = resonant frequency). The densest Ba4Li(Nb0.7V0.3)3O12, with a of 31.3, of + 70 ppm/°C, and high of 42 850 GHz, was obtained at a sintering temperature of 1350°C. Furthermore, the addition of 5 wt.% BaCu(B2O5) (BCB) into Ba4Li(Nb0.7V0.3)3O12 resulted in obtaining dense ceramics at a sintering temperature of 925°C, with a of 23.5, a high value of 14 370 GHz, and of + 88 ppm/°C. Further investigations have shown that Ba4Li(Nb1‐xVx)3O12 ceramics are chemically compatible with Ag, suggesting its potential use in low‐temperature cofired ceramics technology.
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Abomostafa, Hala, Aly Samy Abouhaswa, and E. A. Rabiea. "Preparation of lead hexaferrite filled PVA- PVP nanocomposite and a study of its structural features, optical and dielectric properties." Physica Scripta, December 23, 2022. http://dx.doi.org/10.1088/1402-4896/acae47.
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Abstract Polymer blend films based on PVA-PVP filled with PbFe12O19 hexa-ferrites nanoparticles were created by solution casting technique. XRD, HRTEM, FESEM, FTIR, UV-Vis spectroscopy and Broad-band dielectric spectroscopy were used to examine the properties of the prepared polymer composite films. X-ray diffraction pattern of the powder confirmed the formation of PbFe12O19 with hexagonal phase and that for the films confirmed the incorporation of the PbFe12O19 nanoparticles in the PVA-PVP blends. HRTEM confirms the formation of hexagonal nanoparticles with average size ranged from 7 nm to 21 nm. Field emission scanning electron microscopy (FESEM) studied the morphology of the nanocomposite films. There are noticeable variations in FT-IR spectra that confirm the incorporation of PbFe12O19, NPs in PVA-PVP blend. The absorbance was found to increase with red shift in the ultraviolet-visible region while the transmittance decreases with increasing PbFe12O19, nanoparticles. By incorporating, PbFe12O19 the direct optical gap and indirect optical gap gradually decreased from 5.20 eV to 4.44 eV and 4.97 eV to 4.34 eV, respectively while the Urbach energy increases from 0.274 eV to 0.678 eV. According to the Wemple-Didomenico single oscillator model, the optical dispersion parameters have been examined and are found to be strongly affected by PbFe12O19, loading. Additionally, the nanocomposite film containing 7.5% PbFe12O19, demonstrated outstanding optical shielding. The complex dielectric constant (ε*), complex electric modulus (M*) and electrical conductivity, of NCPs materials have been studied with the frequency changing from 0.1 Hz to 10 MHz. The real permittivity (ε^') of PVA-PVP blend polymer film increased while the real electric modulus (M’) is found to decrease by the incorporation of PbFe12O19, nanoparticles up to 2.5 wt. % and the imaginary component of permittivity follows the same pattern of ε^'. The examined nanocomposite films show promise for flexible optoelectronics, photosensors, optical shielding and nano-dielectric materials.
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Vyshakh, K., K. Arun, Rohith Sathian, AR Furhan, Meenakshi Verma, and MT Ramesan. "Effect of boehmite nanoparticles on structural, optical, thermal, mechanical and electrical properties of poly (methyl methacrylate) nanocomposites for flexible optoelectronic devices." Journal of Thermoplastic Composite Materials, March 27, 2023, 089270572311674. http://dx.doi.org/10.1177/08927057231167418.
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The structural, optical, morphological and thermal properties of poly (methyl methacrylate) (PMMA)/boehmite nanocomposite films were studied by Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) studies. The FT-IR spectra of composites showed the characteristic band of boehmite nanoparticles at 518 cm−1 indicating an effective interaction between PMMA and boehmite. The UV-visible measurements showed that the optical energy gaps for the direct permitted transitions decreased as boehmite content increased. The orientation of nanoparticles observed from XRD revealed that the addition of boehmite increases the crystallinity of PMMA. The SEM analysis showed the uniform distribution of boehmite in the PMMA matrix. The shift in glass transition and melting temperatures to higher temperature domains were revealed by DSC analysis. From the TGA studies, the reinforcement of PMMA with boehmite nanoparticles increases thermal stability. The electrical conductivity was measured using the impedance technique, and it was studied as a function of nanoparticles loading, applied frequency ranging from 100 to 106 Hz and at different temperatures. The AC conductivity of the composite increases with frequency and temperature. The activation energy was also measured for all samples at various applied frequencies, and it was observed that it decreased with increasing nanoparticle loading. The dielectric constant of PMMA increases with nanoparticle concentration up to 7 wt%. The modulus, tensile strength, hardness, and impact properties of the PMMA/boehmite nanocomposite films were significantly enhanced by the reinforcement of nanoparticles into the polymer matrix. The excellent optical properties, mechanical strength and electrical properties obtained for 7 wt% loaded nanocomposite films enable them to be used in the construction of electromagnetic induction shielding materials, conducting adhesives, and flame-resistant flexible optoelectronic devices.
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Jayakrishnan, P., KK Jithin, K. Meera, and Manammel T. Ramesan. "Synthesis, characterization, magnetoelectric properties and gas sensing application of Poly(anthranilic acid-co-indole)/ magnetite nanocomposites." Journal of Thermoplastic Composite Materials, May 10, 2022, 089270572210989. http://dx.doi.org/10.1177/08927057221098969.
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The increased demand for the discovery of new conducting materials encourages the researchers for the development of advanced electronic technologies. In the present study, nanocomposites of poly (anthranilic acid- co-indole)/(PANA- C o-PIN) and magnetite nanoparticles (Fe3O4) were prepared via a one-step polymerization method and evaluated by various analytical techniques. The Fourier transform infrared spectroscopy (FT-IR) spectra proved the presence of Fe3O4 nanofillers in the copolymer at 507 cm−1. Optical characterization (UV-Vis) shows a clear blueshift indicating strong interactions between Fe3O4 and PANA- C o-PIN. The X-Ray diffraction (XRD) patterns revealed an increase in crystallinity due to the well dispersed nanoparticles. FESEM images evidenced the morphological changes caused by the uniform dispersion of nanoparticles in the copolymer matrix. The nano-dispersion of magnetite nanoparticles in the copolymer was confirmed by High-resolution transmission electron microscopy analysis. Magnetic properties of nanocomposites obtained from a vibrating sample magnetometer (VSM) showed an increase in the saturation of magnetism with the addition of nanoparticles and the composite exhibited superparamagnetic behaviour. The thermal stability and glass transition temperature of the nanocomposites were greatly enhanced with the addition of nanoparticles and were determined with the help of Thermogravimetric Analysis (TGA) and Differential scanning calorimetry (DSC) respectively. Filler-dependent electrical properties showed a linearly increased DC conductivity with the addition of nanoparticles. The impedance analysis showed that the AC conductivity and dielectric properties of the nanocomposites were higher than the copolymer and the maximum electrical properties were observed for 15 wt.% of composites. The ammonia gas sensing performance of copolymer composite indicates the easy access of gas molecules to the sensor surface through the metal oxide nanoparticles. The synthesized copolymer nanocomposites showed high sensitivity and fast response to ammonia gas. The prepared composite with good thermal properties, dielectric constant, ammonia gas sensing and magnetoelectric properties is a promising candidate for use in nanoelectronics devices.