Ba 2 FeNb O 6 (BFNO) was synthesized by solid state reaction route. The Rietveld refinement of the XRD pattern confirmed a single-phase cubic structure (χ 2 = 1.72), and the average crystallite size was calculated precisely using different methods. The average grain size of 0.72 µm was found from SEM. Ba 2 FeNb O 6 shows very low loss (⁓1.2) up to 250 ° C . The optical band gap (1.4 eV) calculated from UV–Vis spectroscopy assumes a direct allowed transition. The magnetic measurements at room temperature show a predominantly paramagnetic behaviour. The combined structural, dielectric, optical, and magnetic correlations presented in this work make BFNO a multifunctional double perovskite oxide.

In this paper, a double perovskite MgCaFeNbO6 ceramic was synthesized and systematically investigated to evaluate its potential for negative temperature coefficient (NTC) thermistor applications. The FullProf Rietveld structural analysis performed using recorded X-ray diffraction (XRD) data to confirm the formation of a monoclinic crystal symmetry with. average crystallite size of 108.3 ± 1.7 nm, and the corresponding microstrain was (6.20 ± 0.25) × 10−5 along with dislocation density 8.52 × 1013 m−2. Study of dielectric constant and loss with both frequency and temperature reveals that sample attains maximum dielectric constant of 1125 and loss of 0.4, indicating good quality material for energy storage devices. Study of impedance with frequency reveals a typical negative temperature coefficient of temperature (NTCR) character, decreasing resistance part with increasing temperature. The calculated activation energy values suggested strong thermally activated conduction, dominated by small polaron hopping of localized charge carriers between Fe2+/Fe³+ and Nb4+/Nb5+ ions. The study of the electrical modulus versus frequency confirms the presence of a non-Debye type of relaxation. The analysis of both Nyquist and Cole-Cole plots reveals that the studied sample has semiconducting properties and restricted application related to semiconductors. The study of resistance versus temperature provides thermistor constant, sensitivity factor, and activation energy values that fall within the range suitable for practical NTC thermistor applications.

Copper-based chalcogenides CuFeTe2 and doped CuFe(SxSeyTe1-x-y)2 have excellent optoelectronic properties, it can be used in related technical fields such as solar cells. This study used first-principle calculations to analyze the optical and electronic structural properties of CuFe(SxSeyTe1-x-y)2. Compared to the undoped CuFeTe2 composition, the XRD peaks of CuFe(SxSeyTe1-x-y)2 along the crystal planes significantly shifted toward lower diffraction angles. Analysis of the calculation results showed that as the wavelength increased, the absorption coefficients of CuFe(S0.125Se0.125Te0.75)2, CuFe(S0.25Se0.25Te0.5)2, CuFe(S0.25Se0.5Te0.25)2, and CuFe(S0.5Se0.25Te0.25)2 gradually decreased and tended to stabilize. They have better absorption coefficients for ultraviolet light waves. The increase in doping concentration, the peak energy loss spectrum of the CuFe(SxSeyTe1-x-y)2 (x = 0.125, 0.25, 0.25, 0.5; y = 0.125, 0.25, 0.5, 0.25) system also increases, and the peak energy loss spectrum of CuFe(S0.5Se0.25Te0.25)2 increased significantly. The peak values of the energy loss spectra of the four doped component systems increased significantly, but all peaks were located at photon energies of approximately 23 eV. Compared to the photon energy of 22.34 eV at the peak position of the undoped CuFeTe2 system, there was no significant shift. The peak energy loss of the doped system in the visible light region is relatively low and, close to zero, indicating that co-doping with S and Se has little effect on the energy loss of the CuFe(SxSeyTe1-x-y)2 (x = 0.125, 0.25, 0.25, 0.5; y = 0.125, 0.25, 0.5, 0.25) system.

In recent years, nanotube-based devices have found various applications in many areas, particularly in electronics, and their study is important from both basic and applied points of view. Here, the recent advances in modelling and simulation of nanoscale electronic devices and their applications are presented which includes 1) carbon nanotube-based two probe devices, 2) carbon nanotube-based transistors, 3) carbon nanotube-based logic gates, 4) carbon nanotube-based noble gas sensors 4) spin and light controlled carbon nanotube-based logic gates, 5) carbon nanotube-based photodetectors and photoresistors, 6) pentagraphene nanotube based noble gas sensors and 7) silicene-based devices. Furthermore, the study presents the transport properties of various devices and their futuristic applications.

In the present study, Potentilla fulgens L. methanolic root extract (PF) was examined to evaluate its comparative ultrastructure effect on the liver and kidney of diabetic and high-fat diet (HFD) mice models. The diabetic mice and HFD mice were treated with PF and separately with their respective standard drugs, metformin, and orlistat respectively. The kidney and liver were isolated on the last day for transmission electron microscope (TEM) study. TEM results showed a remarkable change in the nucleus with distorted shape in the liver and kidney of diabetic and HFD mice. The endoplasmic reticulum tubules were found to be deteriorated, fragmented, and dilated in both models. Mitochondria membranes were disrupted and were found to be less in number in the liver and kidney of both the mice models when compared to their respective control groups. The presence of lipid droplets was observed only in HFD mice, which is a pathological hallmark of a metabolic disease. Treatment with PF restored these ultrastructural abnormalities observed in diabetic and HFD mice.

This research article includes the employment of Silane modified Magnesium and Manganese-Magnesium doped nanoferrite samples for effective Lipase immobilization. Magnesium and Manganese-Magnesium doped nanoferrite (M1FeO and M2FeO) samples are prepared by self-ignition process. M1FeO and M2FeO samples were functionalized with TEOS by using Stöbers process. The physiochemical and magnetic characteristics of the prepared nanoferrite samples were analyzed by XRD, FTIR, FESEM and VSM studies, respectively. The XRD and VSM results of M1FeO and M2FeO confirms the crystallite size as 36 nm and 28 nm with saturation magnetization as 39 emu/gm and 28 emu/gm, respectively. The successful immobilization of Candida rugosa Lipase was confirmed by FTIR, FESEM and VSM results. After immobilization the effect of reaction parameters like temperature, pH and time was studied to analyze the catalytic efficiency of the immobilized enzyme.

Growth of industrial development, suburbanization and world populace needs fresh water for development of economy and sustainable life. Fluoride ions present in drinking water at excessive levels can cause several chronic health issues, such as dental fluorosis, skeletal fluorosis, arthritis, bone and muscle degeneration, osteoporosis, and weariness. Optical chemo-sensors can identify various cations and anions in a domain. Due to their exceptional qualities, GQDs gained a lot of interest as fluorescent and tiny carboniferous nano-structures used for building contaminants detection devices e.g. simplistic surface variation, photostability, optical tunability and ecological friendliness. Raman spectroscopy is used for morphological detection, while FTIR and XRD methods are used to identify a specific functional group. Our results show that functional group doped graphene quantum dots exhibit exceptional sensitivity and selectivity toward Fluoride, enabling reliable detection of Fluoride concentrations below 0.2 μg/L in a limited instant. Testing of Fluoride with QDs is more rapid, straight-forward, labor-free than traditional procedures. As a result, the technology for Fluoride detection that is currently available may be quickly applied in the field and is especially helpful for testing the water quality in communities with limited resources. In this paper, the recommended IoT sensor, which is particularly helpful in rural areas is able to identify Fluoride in common applications for non-expert users.

The lead-free 0.96(K0.485Na0.485Li0.03) (Nb0.96Sb0.04)O3-0.04(Bi0.5Na0.5)ZrO3 piezoceramic was synthesized using a conventional solid state reaction method. Pure perovskite was successfully formed without any secondary compound at relatively low sintering temperature 1075 °C. The dielectric behavior of the ceramic reveals that it manifests multi-phase boundary and behaves as relaxor ferroelectric. The ferroelectric properties of this KNN based system is appreciably improved by combining with adequate proportions of BNZ, Li2+, and Sb5+. The piezoelectric properties of the ceramic (d 33 =140 pC.N−1, k p = 35%, P r = 14 µC.cm−2) indicate that this material could be a promising lead-free material for piezoelectric applications. The high value of dielectric constant at room temperature (ε rt = 1100) with high Curie temperature (T c = 356 °C) point toward the possibility of this material being used for high temperature multilayer capacitor applications and super capacitors for electrical devices or vehicles.

This study aims to investigate the effect of maleic acid doping on structural, optical, mechanical and piezoelectric properties of lithium sulphate monohydrate oxalate (LSO) single crystal. Pure LSO and maleic acid-doped LSO (M-LSO) semi-organic single crystals were grown by controlled slow evaporation technique at 40 ± 1 ° C . The HRXRD study showed that of both crystals belongs to the triclinic crystal system. The functional groups present in LSO and M-LSO materials were identified by Raman spectroscopy. The results showed an enhancement in the optical, mechanical and piezoelectric properties of LSO as a result of maleic acid doping. Therefore, M-LSO can be a better candidate as compared to LSO and many similar crystals for optical, electronic and piezoelectric devices.

Among the most promising alternatives to conventional fossil fuels, inexhaustible solar energy received great interest. The solar cells capture solar energy, transform it into electric energy, and then store it in energy storage devices. Understanding how to harvest solar energy and store it in a single device is crucial for improving energy utilisation efficiency. Due to the potential for use in smart electronics, photo-powered energy storage systems are gaining great scientific attention. They are ideal as future power sources and have emerged as a potential substitute for existing energy sources. Due to its simplicity in manufacture, cost compatibility, as well as multi-axial flexibility, planar and flexible photo-supercapacitors are both receiving attention. The last ten years have witnessed a significant increase in the development of integrated devices, and among all, solar cells paired with electrochemical energy storage (EES) devices have distinct photo conversion and storage features with improved performance and efficiency. Researchers have so experimented with many different device combinations. In this review, two foremost types of significant integrated devices i.e. photovoltaic and photoelectrochemical‐supercapacitors are highlighted. Moreover, the challenges as well as future directions in this area of research are also discussed. It is supposed that this review paves an avenue towards the advancement of highly efficient devices for the conversion and storage of solar energy.