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Biosensors are the devices that find application in almost every field nowadays. In this paper, GaN MOSHEMT based biosensor is proposed for detection of biomolecules such as ChOx, protein, streptavidin and Uricase. The effect of biomolecule species on the performance parameters of the device has been studied. It has been observed that there is a significant increase in the drain current and gd is observed with the addition of biomolecule in the nanocavity. The electron concentration contour is studied which shows the rise of carrier concentration with biomolecule. Maximum positive shift is observed in threshold voltage for Uricase due to lowest dielectric constant. Similarly, the change in transconductance is also obtained with biomolecules. The effect of cavity dimensions on sensitivity is also studied. The maximum increase of 10% in channel potential is noted due biomolecule presence in the cavity. This device has shown good sensing and can be used for biosensing applications efficiently in addition to the high power performance of MOS-HEMTs.

The effects of Sm-doped on microwave absorption properties of melt-spun FeSiCo alloys were studied in this paper. The composite alloys were characterized by XRD, SEM, VSM, and vector network analysers (VNA). The phase identification shows that only α-Fe(Co) phase was observed for all samples. SEM images have revealed that the morphology of all powders were flaky shape with different particle size. The values of saturation magnetization (Ms) and coercivity (Hc) increased with the increase of Sm-doping content. In addition, the minimal reflection loss ((RL)min) is − 7.96 dB at 1.7 GHz with the thickness of 3 mm for Sm1Fe79Si10Co10 sample. The results reveal that the addition of Sm can improve the microwave absorption property of FeSiCo alloys.

In this paper, Cu-substituted NiZn ferrites with nominal compositions of (Ni0.3Zn0.7)1−xCuxFe2O4 (0 ≤ x ≤ 0.4) were prepared by solid-state reaction method. Then, the structural, element composition, valence distribution, surface morphology and magnetic properties of the samples were investigated systematically. As the concentration of composition (x) increases, the lattice constant gradually decreases. When x = 0.1, the μ′ are much higher than of the pure sample, and the power loss lower than that of the sample without Cu, which indicating a significant improvement as substituting in an appropriately extend. Thus, the high permeability and low power loss can be obtained by the small addition of Cu in NiZn ferrites, which improve the application range of the NiZn ferrites.

This paper has investigated the absorption properties of multi-layer BaFe12O19/epoxy composites. Various Ba-ferrites were synthesized by the co-precipitation method followed by high-energy ball milling for the homogenizing and milling purposes. The microstructural, structural, loss-related behavior and magnetic properties were examined by the X-ray diffractometer, field-emission scanning electron spectroscope, network analyzer, and vibrating-sample magnetometer, respectively. The material indicated an enhancement in the saturation magnetization from 35.45 to 57.83 emu/g by increasing the heat-treating temperature (HT). The effects of the type and number of layers on microwave absorption behavior were obtained from the X-range (8 to 12 GHz). The ferromagnetic resonance and transmit-line theories were also employed to analyze these factors on the microwave absorption. These microwave absorbers were modeled and simulated by MATLAB. The simulations were carried out from 8 to 12 GHz to analyze the absorbers performance. Based upon these theories and experimental data, the microwave absorption can be altered solely by changing the materials between the layers. For instance, the maximum peak was increased from − 3 to − 15 dB by altering the as-synthesized ferrite powders to the completed ferrite powders (BaFe12O19). Moreover, there was a sufficient match between experimental data and theoretical results.

Wafer warpage, which mainly originated from thermal mismatch between the materials, has become serious in wafer level packaging (WLP) as larger diameter and thinner wafers are required currently. In this paper, three-dimensional wafer warpage profile and the warpage evolution during typical fan-in WLP processes including wafer thinning process were characterized in situ. Special attention was paid to the bifurcated phenomenon. Prior to the wafer thinning process, the wafer deformed into a bowl shape which was caused by polyimide (PI) curing. A distinct bifurcation behavior appeared and the wafer warped into a cylindrical shape when the wafer was thinned below 270 μm. This bifurcation behavior was systematically analyzed by theoretical analysis and finite element analysis (FEA). Equivalent material model method and perturbation method were employed to simplify the FEA model and incur the bifurcation behavior, respectively.

Perovskite solar cells appear to be the most promising candidate for thin-film solar cells. ETL layer which can be processed at lower temperature is highly desired. In this work, an n-i-p PSC was simulated using SCAPS 1-D simulator in which different ETL layers were used keeping other layers fixed. Among all the ETL layers used, we found a new ETL material WO3 which showed better power conversion efficiency and other PV parameters as compared to other ETL’s. The proposed ETL gave an efficiency of 15.54% under optimal conditions. This paper addresses the properties of WO3 thin films to be used as ETL layer in PSC and a comparative study has been done with other suitable ETL layers reported till date with the optimization of the absorber layer as well as HTL layer thickness.

Abnormal vibration may cause the internal failure of transformers. In particular, the nonlinear saturation vibration of the iron core under direct current (DC) magnetic bias will lead to serious structural damage. In this paper, the dynamic process of transformer deformation under magnetic bias is completed by studying the magnetostrictive effect of ferromagnetic materials and analyzing the strain of the iron core. First, the silicon steel magnetostriction model is proposed and the computing processing is analyzed which explains the directivity characteristics of oriented silicon steel. Next, a coupled transformer model of the electromagnetic field and mechanical strain are built based on the piezomagnetic effect. Then, a dry transformer is performed in finite element (FE) application and after that, the displacements of test points are calculated by using measured magnetostriction curves and the FE model. Finally, vibration test is done to analyze the DC bias characteristics. The result of both calculation and measurements reveal that the magnetostriction of silicon material is the key factor of core vibration. It leads to the DC bias of transformer core remarkably and the magnetostriction of core material must be considered for transformer design and its applications.

Silicon carbide (SiC) is a promising material for power devices because of its wide bandgap and high thermal conductivity. However, carbon remaining in the metal–SiC interface (carbon cluster) adversely affects the ohmic contacts. As a result, the ohmic contact characteristic worsens and the on-state power loss of the device increases. In addition, the carbon cluster in the metal–SiC interface degrades the device’s high-temperature thermal stability. In this paper, Co/Si/Co/Si is used as an ohmic contact material to reduce the carbon cluster and improve the thermal stability. The specific contact resistivity was measured, and the effect of the Co:Si composition ratio and the annealing condition for the ohmic contact was analyzed. The thermal stability was investigated by measuring the specific contact resistivity through a thermal duration test. The measurement results were analyzed using the X-ray diffraction method.

Generally, it is very difficult to grow large diameter 4H-SiC single crystal with single polytype by Physical Vapor Transport (PVT) growth method and mostly it ends up with the presence of some other polytypes (viz. 6H, 15R). This paper presents the various comprehensive polytype identification techniques in SiC wafer grown by PVT method. Characterization techniques, viz. X-Ray diffraction, Scanning electron microscopy, Cathodoluminescence (CL) and Raman spectroscopy, are used in the present study in order to identify the presence of 4H, 6H and 15R polytype region in SiC wafer. Raman mapping (using phonon frequencies at 150, 171, 203 cm−1 for 6H, 15R and 4H, respectively) and X-Ray Topography [using grazing incidence asymmetric plane (11–2 8) for 4H-SiC, (11–2 12) for 6H-SiC and (11–2 30) for 15H-SiC] and CL spectra (defect state peak positions at ~ 500 nm and 580 nm for 4H and 6H, respectively) are proposed to distinguish the switching of polytypes in a large area SiC wafer. The polytype switching in SiC ingot may occur because of temperature fluctuations during the sublimation growth process.

In this paper, we study ferroelectric domain structures, optical properties, as well as domain dynamic performances induced by external in-plane electric field of Eu-doped lead magnesium niobate-lead titanate [Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT)] transparent ceramics mainly via piezoresponse force microscopy (PFM). It is found that Eu doping play a significant role on the domain structures and domain switching behavior in PMN-PT transparent ferroelectrics. For some compositions the switching of domain structures exhibit a normal evolutionary trend, while for the compositions with low Eu doping content, unusual anisotropic polarization switching behaviors were obtained in macrodomain regions under in-plane bias in the Eu-doped PMN-PT transparent ceramics.

Thermal breakdown is the main form which leads to direct current (DC) cable accessories insulation invalid. In order to enhance the insulation of DC cable accessories, liquid silicone rubber (LSR) is improved by filling micron boron nitride (BN) to promote the dielectric properties and thermal conductivity in this paper. The electrical conductance, DC dielectric breakdown strength (DBS), dielectric spectrum and thermal conductivity of micro-BN/LSR composites with various filling concentrations are analyzed in combination with the charge-trap energy-level distributions by means of isothermal surface potential decay (ISPD) method. By filling micron BN into LSR, the insulation performance and thermal conductivity can be improved simultaneously, thus achieving a higher insulation reliability. When the concentration of BN micron-filler is increased to 40 wt%, the electrical conductivity can be reduced by three orders of magnitude compared with pure LSR, and the DC DBS and thermal conductivity rises by 52.82% and 141.38%, respectively, while the relative dielectric permittivity and dielectric loss are slightly increased. The ISPD analyses indicate that trap-level depth in BN/LSR composites can be further raised by increasing the concentration of BN micron fillers, thereby getting a higher DBS.

When a transformer is running, the insulation oil gradually becomes degraded due to various factors such as electricity and heat, during which low molecular weight gases are formed upon decomposition. By analyzing the gas content in the oil, the state of the insulation oil can be identified, thereby providing an effective basis for transformer fault analysis and diagnosis. However, when the types and severity of the internal faults inside the transformer are different, the components and contents of the gases dissolved in the oil also differ. Sometimes when the types of faults are the same, the gas content may be different. Therefore, if the characteristic of the specific gas content corresponding to a type of fault can be obtained, the transformer faults can be accurately identified according to the contents of different gases, which can most efficiently ensure the reliable operation and maintenance of power transformers. In this paper, an identification method based on the deep transfer network was proposed. According to this method, by studying the existing gas contents and states based on a large number of training data to discover their characteristics, the states of gases in the oil can be precisely identified. Experiments have proved the effectiveness of this method. The ability of state identification by this method is far superior to that of the other existing methods.

Due to the comprehensive performance on optoelectronics and mechanics, flexible electronics based on silver nanowires (AgNWs) network have attracted many attentions and achieved diverse functions comparing traditional electronic device. As more researches have been progressing, major advanced devices using AgNWs have been made, such as flexible optoelectronic devices, electromagnetic shielding, bio-robot’s components, and intelligence sensors and influence in human daily life. Comparing to the traditional transparent conductive material, such as indium tin oxide (ITO), AgNWs network performs more excellent in optoelectronics, mechanical properties and stability, and gradually appears on transparent flexible applications. However, a series of problems would be encountered in the fabrication process, such as geometric controllability, electronic and mechanical stability, and device manufacture. Plenty of studies on AgNWs for these interacting aspects have been conducted and achieved excellent progress. With these considerations, the latest progress to AgNWs network preparation and applications are reviewed in terms of manufacturing process, performance evaluation and enhancement, typical applications in this paper. The main challenges and prospects of the AgNWs network in future applications are briefly evaluated.

The Ba1–xCax(Mg1/3Ta2/3)O3 (BCMT, 0 ≤ x ≤ 0.05) microwave dielectric ceramics were synthesized by the conventional solid-state ceramic route. In this paper, the effects of Ca2+ substituting for Ba2+ on the phase structure, microstructure, and microwave dielectric properties of Ba1–xCax(Mg1/3Ta2/3)O3 ceramics were investigated. X-ray diffraction (XRD) exhibited that the Ba1–xCax(Mg1/3Ta2/3)O3 ceramics possessed the main phase Ba(Mg1/3Ta2/3)O3 (BMT) when 0 ≤ x ≤ 0.05 and secondary phase Ba0.5TaO3 for x = 0.05. SEM micrographs showed that the substitution of Ca2+ for Ba2+ could increase the grain size. The apparent density was influenced by the concentration of liquid phases caused by the substitution of Ca2+ for Ba2+ ions. The microwave dielectric properties depended heavily on apparent density, B-site cation ordering degree, Ba-deficient, secondary phase and distortion of oxygen octahedral. Finally, Ba1–xCax(Mg1/3Ta2/3)O3 (x = 0.04) ceramics sintered at 1450 °C for 8 h showed superior microwave dielectric properties of er = 24.1, Q × f = 165,800 GHz and τf = 0.12 ppm/℃.

It has repeatedly been reported that low conductivity of iron oxide as a major challenge limited its supercapacitive application, where compositing Fe3O4 with carbonaceous nanomaterial can be considered as excellent solution strategy. In this paper, we report Fe3O4 nanoparticles electrochemically deposited on graphene oxide sheets as high-performance nanocomposite for energy storage applications. Iron oxide nanoparticles (Fe3O4) are cathodically decorated on N-doped porous graphene (N-PG) nanosheets. The prepared pristine and nanocomposite materials were characterized by FT-IR, Raman, XRD, BET, TEM, FE-SEM, EDS, as well as TGA/DSC techniques. The electrochemical properties of resulting Fe3O4/Ni foam and Fe3O4@N-PG/Ni foam electrodes were investigated through CV, GCD, and EIS techniques, and the obtained data showed that the fabricated hybrid electrode (i.e., Fe3O4@N-PG/Ni foam) is enable to present specific capacitance values s as high as 822 and 631 F g−1 at the 0.5 and 10 A g−1, respectively, where the pristine Fe3O4/Ni foam electrode showed 279 and 131 F g−1 at the 0.5 and 10 A g−1. Furthermore, the hybrid Fe3O4@N-PG/Ni foam electrode showed excellent cycling ability, good high rate, and higher energy density as compared with the Fe3O4/Ni foam electrode. These enhancements were assigned to the synergetic contributions between N-doped porous graphene sheets and iron oxide particles, which mainly results from the rational architecture of N-PG nanosheets and Fe3O4 nanoparticles provided by the applied synthetic route.

This paper presents an in-depth performance-based comparison of organic field-effect transistors (OFETs) prepared using the conventional spin coating (SC) technique and a recently developed floating film transfer method (FTM). A remarkable improvement in the performance of transistors fabricated using FTM was achieved in comparison to their SC counterparts. The estimated value of width-normalized contact resistance in FTM-based OFETs was an order lower in comparison to that of transistors prepared using SC technique. The observed results were credited to a significant enhancement in the length of π-conjugation due to the presence of edge-on oriented polymer chains of active layer deposited using FTM, leading to the lowering of carrier injection barrier at the Au/P3HT interface. These results were well supported through absorption, photoluminescence and Raman measurements as well as the anisotropy measurements using polarized absorption spectra, which also pointed towards the improvement in the polymer chain alignment of thin films prepared by FTM over that prepared by the conventional SC technique. The results indicate thin film morphology as a key towards reducing the contact resistance in OFETs.

Sn–Ag–Cu solder alloys were usually modified using trace elements to achieve various properties. This paper investigated the effect of additives of Ni, Bi, and Sb on the microstructure and corrosion behavior of SAC alloys under application condition. Investigation was carried out using both solder alloy ingots and reflow-soldered surface insulation resistance interdigitated patterns by electrochemical methods under humid and corrosive conditions. Microstructure analysis was performed using X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy etc. Volta potential distribution in the bulk of the alloy was analyzed by Scanning Kelvin Probe Force Microscopy. Results show the passivation domain of five tested solder alloys did not influence the susceptibility of electrochemical migration under 5 V DC bias loading. Ni and Bi additives resulted in lower susceptibility of electrochemical migration due to homogeneity of the IMCs distribution in the bulk alloys. Bi precipitates in InnoLot alloy participated micro-galvanic corrosion as cathode rather than Ag containing phase as known before.

This paper reports investigations on flexible magnesium-ion-conducting polymer electrolyte membranes using mechanical, structural, and electrochemical impedance spectroscopic analysis. XRD studies reveal significant changes in structural character on varying the concentration of propylene carbonate-diethyl carbonate (PC-DEC) organic solvent within the polymer electrolyte matrix. SEM and AFM studies indicate variation in surface morphology and maximum roughness height by introducing PC-DEC in increasing amount. The plasticized polymer electrolyte membrane with optimum concentration of 15 wt% PC-DEC demonstrates magnesium-ion conductivity of 3 × 10− 5 s cm− 1at room temperature. This flexible electrolyte has Young’s modulus of 100 N mm− 2, mechanical strength of 2 Kgf, and ability to withstand stress of 6 N mm− 2 and strain of 7 N mm− 2 at a maximum load of 10 Kgf. The electrolyte membranes do not show any degradation after stretching and rolling it for hundred times. The electrolyte membrane offer electrochemical stability window of ~ 3.5 V and Mg2+ transport number of 0.32. The reported electrolyte membranes can be employed in fabricating flexible magnesium batteries.

The application of BiFeO3 (BFO) in the treatment of environmental water pollution is very important. In this paper, Ba-doped bismuth ferrite series nanomaterials were prepared by sol–gel method. The results of X-ray diffraction show the evolution of the crystal structure by doping of Ba, while it can be seen by scanning electron microscopy that the doping reduces the grain size gradually. The band gap gets narrow after doping with Ba, result in high efficiency for the degradation of methyl orange under visible light irradiation. Furthermore, it is found that the ferromagnetism increases with the increase of Ba doping. Therefore, the BFO-based photocatalyst can be obtained by Ba doping with good performance.

Lithium–sulfur cells are quite promising devices for the next generation energy storage applications. However, their specific capacity and cycling stability are adversely affected by poor electrical conductivity of sulfur, shuttling effect of lithium polysulfides and the volume expansion of sulfur during lithium intake. These limitations can be averted through modifying the sulfur cathode by making composites with electrically conducting polymers and carbon nanostructures. The work presented in this paper mainly deals with the modification of sulfur cathode by making composites with polypyrrole, graphene, and polypyrrole/graphene and the investigations carried out to assess their suitability to design Li–S cells with high energy density and good cycling stability.

In this paper, we report the application of Bougainvillea glabra flower extract as a green-reducing agent for the reduction of chemically prepared graphene oxide (GO). The removal of oxygen-containing functional groups after reduction of GO was due to the presence of phenolic compounds in the flower extract of Bougainvillea glabra. Towards the sensing of Pb2+, a simple drop-casting technique was adopted to fabricate the sensing element by modifying the surface of screen-printed carbon electrode (SPCE) with rGO-nafion nanocomposite. Differential pulse voltammetry was employed as an electroanalytical technique to study the sensing capability of the proposed electrode for different concentrations of Pb2+. The fabricated SPCE exhibited a low limit of detection of 0.05 nM toward Pb2+ with an improved sensitivity of 25.273 µA nM−1 over a linear range of 0.05–8.67 nM.

Urea is an important molecule in physiology and industry. The detection of urea by electrochemical sensors has broad application prospects in food detection and kidney disease screening. This paper introduces the preparation method of MWCNT/PANi electronic ink and its composite electrode, which was applied to the detection of urea. The linear range of the MWCNT/PANi composite electrode was increased by adjusting the concentration of MWCNT. The maximum linear range was 10 to 100 μM when 5.6 mg MWCNT was added. The sensitivity of the electrode was 2.435 $$\times$$ 10−4 mA mM−1 cm−2 and the detection limit was 53.9 nM. At the same time, an algorithm was proposed to identify and analyze the data collected by the electrochemical workstation in view of the errors existing in the calculation of the electrochemical sensor when analyzing the optimal response voltage of the electrode. This method was used to set constraints and screen the optimal working voltage. Experimental results show that this method has certain advantages.

Carbon nanotubes (CNTs) have been proved a significant role as the reinforcement material in improving the mechanical and electrical properties of metal matrix composites due to their high mechanical properties, excellent electrical and thermal conductivity as well as unique atomic structure. In addition, the dispersion of CNTs has been a key factor in fabricating of metal-based complex especially for copper (Cu) with performance improvement. In the present paper, the well dispersion of functionalized CNTs (F-CNTs) is obtained at the first time, accompanied by using pulse reverse electrodeposition (PRED) technology, leading to formation of the ultrahigh electrical conductivity composite films of Cu/F-CNTs. These composite films exhibit an ultrahigh electrical conductivity of up to 6.1 × 107 S/m (increased by 105.4% of that international annealed copper standard, IACS), but maintain a high hardness of 82.3 HV and tensile strength of 297.1 MPa. It is believed that this work opens new perspectives to develop ultrahigh electrical conductivity composite materials and would role as electric wire for reducing energy loss.

In this paper, two dimensional nanosheet (2D) Zn3(OH)2V2O7·2H2O has been synthesized by a facile hydrothermal method. The structure and morphology evolution of the resulting material are characterized by several technologies. Applied for anode of lithium-half cell, the as-synthesized sample delivers a high reversible capacity, long-cycling stability, and good rate capability due to intrinsically great area and the short diffusion distance. Notably, according to the equivalent electrical circuit and the non-linear least square regression method, the in-situ electrochemical impedance spectra during the initial discharge–charge cycle are simulated, which indicates that the kinetics property changes significantly when discharged to 0.5 V, and then keeps stability.

With the rapid development of the third-generation semiconductor materials, an appropriate high-temperature-resistant die attach material has become one of the bottlenecks to fully exploit the excellent properties of the third-generation semiconductor power devices. At the same time, a low-bonding temperature is always the pursuit goal of packaging engineers to reduce the thermal residual stress in electronic devices. In this paper, a low-temperature bonding method was proposed to address the above-mentioned issue based on In infiltrating the nanoporous Cu. In, as a low melting point metal, can significantly reduce the bonding temperature, and the nanoporous Cu structure can provide a very large specific surface area, which greatly increases the consumption rate of In. Furthermore, the formed Cu-In IMCs with high-remelting temperature can withstand the high operating temperature. The microstructures of the bondlines before and after bonding were studied in detail. The results show that the bondline can completely consume the low melting point In, within 10 min at 165 °C under a pressure of 0.75 MPa. When the bonding temperature was further increased to 310 °C, the bondline was composed of η-Cu2In and δ-Cu7In3 phases, whose melting points were more than 600 °C. The average electrical resistivity was determined to be 5.53 ± 0.65 μΩ cm, and the thermal conductivities were 144.33 W m−1 K−1, 139.24 W m−1 K−1 and 129.79 W m−1 K−1 at 30 °C, 150 °C and 300 °C, respectively. The average shear strength were 19.09 ± 3.4 MPa, 20.47 ± 4.6 MPa and 30.73 ± 5.2 MPa at 30 °C, 250 °C, 310 °C, respectively. These results indicate that the nanoporous Cu infiltrated with In could meet the requirements of electrical, thermal conduction, and mechanical support as a die attachment for high-power devices.

As we all know, solid-state batteries (SSBs) which can effectively inhibit lithium dendrites have disadvantages such as low conductivity and poor cycling performance, and the preparation process of their solid electrolyte is complex and costly, which makes it difficult to meet the requirements of commercialization. Therefore, this paper proposes a strategy to prepare a new solid electrolytes (Li-IL@Al-PILC solid electrolyte) using the nano-2D interlayer structure of Al-pillared clay (Al-PILC) as Li+ channel through an impregnation method. This Li-IL@Al-PILC SSE at 15% Li-IL has many advantages, such as high conductivity (2.13 × 10−3 S/cm at 25 ℃), good thermal stability (up to 450 ℃), extremely wide electrochemical window (up to 5.5 V) and low cost. At the same time, the assembled battery exhibits good cycling performance, with capacities of 120 mAh/g after 1000 cycles at 0.5C for LiFePO4 and good compatibility with the electrode. Due to its good mechanical hardness and nano-2D interlayer interface, Li-IL @ Al-PILC SSE has a certain ability to inhibit the growth of lithium dendrites. Through the above results, it can indicate that Li-IL @ Al-PILC SSE owns a good prospect for lithium metal batteries.

Urgent requirement exists to develop the lead-free piezoelectric energy storage devices, sensors and actuators for the reduction of toxicity in the environment. This paper deals with the lead-free ferroelectric single crystals with excellent piezoelectric behaviour. A series of pure and doped (Mn and Nb) (1−x)Na0.5Bi0.5TiO3–xBaTiO3 (NBBT) bulk size single crystals was successfully grown by the top-seeded solution growth (TSSG) method. The crystal growth, phase confirmation, compositional analysis, electric properties and energy storage density were investigated. The NBBT crystal belongs to perovskite structure and is confirmed using X-ray Powder diffraction pattern (PXRD). The elemental composition of the NBBT crystals grown by TSSG was investigated by the Inductively coupled plasma-Atomic Emission spectroscopy (ICP-AES). The electrical properties like dielectric constant (er = 674, 700, 837, 694, 2872 and 378) and dielectric loss (tanδ = 0.2, 0.6, 0.5, 0.7, 0.47 and 0.27) were measured and it was found to be relaxor-type behaviour due to diffuseness of NBBT crystals by the dielectric permittivity. The piezoelectric coefficients (d33 = 374, 290, 167, 110, 410 and 103) and piezoelectric voltage coefficients (g33 = 6.26, 4.6, 2.2, 1.79, 1.6 and 3.0) were obtained. Greater value of remnant polarization (Pr = 87, 46, 30, 0.30, 117 and 0.11), maximum polarization (Pm = 104, 55, 49, 1.08, 136 and 0.34) and lower value of coercive electric field (Ec = 16.5, 13.8, 26, 0.64, 20 and 233) were obtained from the P–E hysteresis loop of NBBT crystals studied to identify good performance of the compositions. The NBBT 90/10 crystal was found to be of 94/06 composition as obtained from ICP-AES. Moreover, NBBT 90/10 was doped by Mn and Nb and its electrical properties were measured. The Mn-doped NBBT 90/10 crystal attained a large energy storage density (W) of 0.27 Jcm−3 at ~ 20 kV cm−1 compared to the undoped and Nb-doped NBBT 90/10 crystal.

This paper reports the development of a facile hydrothermal approach to grow pure BiFeO3 (BFO) films on BFO seed-layer-coated indium tin oxide/glass substrates in mild conditions. The results indicate that the seed layer and no involvement of complex agents were crucial for the mild condition [small amount of NaOH (approximately 1 g); 180 °C] because of homogeneous nucleation and growth of the BFO films. The phase and crystallinity of the BFO films were studied through X-ray diffraction, high-resolution transmission electron microscopy, and selected area electron diffraction. The stoichiometric BFO films were ascertained using electron-probe energy-dispersive spectroscopy. The band gap of the BFO films was approximately 2.6 eV. The induced piezopotential of approximately 2.0 mV at a stress of approximately 0.6 GPa indicated the piezoelectric property of the obtained BFO films. The associated piezotronic properties were determined from the asymmetric current–voltage characteristics. The piezophotocatalytic efficiency for methylene blue degradation under visible light irradiation was approximately three times higher than for photocatalysis without stress.

Inorganic two-dimensional semiconductor indium sulfide (In2S3) has recently attracted considerable attention as a buffer material in the field of thin-film photovoltaics, photo electrochemical cells and other energy-related applications. Compared with this growing interest, however, detailed characterizations of the commercial material are not done. The present investigation deals with the systematic investigation of the physical properties of powdered β-indium sulfide (In2S3). The crystalline structure, the composition, and the morphological properties of the samples were characterized using a range of techniques such as X-ray powder diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). X-ray diffraction patterns revealed mixed peaks of In2S3 and In2O3 for the sample annealed at 400 °C. The In2O3 peaks were crystalline with a cubic phase with a (222) preferential orientation. These results were supported by the FTIR, and XPS studies. Thus, a significant correlation was established between the annealing temperature and the TEM images. The main conclusion of the paper opens the possibility of using In2S3 layers for solar cells.

In the present paper, we employed a co-precipitation method and the modification by stearic acid (SA) to fabrication of silver-(Ag) doped zinc oxide (ZnO) nanostructure surfaces with both superhydrophobicity and photocatalytic properties. The effects of Ag-doped and SA weight on the structure, morphology, water contact angle (WCA), and photodegradation were investigated. The results of surfaces wettability showed that the WCA increased from 146 ± 2° to 156 ± 2° when the weight of SA increased from 5 to 20 mg due to formation of hierarchical or rough structure. To evaluate the photodegradation of Methylene blue (MB) dye under visible light irradiation the specimens before and after treatment with SA (20 mg) were chosen. The results showed rapid photodegradation of MB after 80 min irradiation with degradation efficiency 93% for superhydrophobic state and 96% for the hydrophilic state. This work suggests an effective approach in water treatment application.

It is still a bottleneck to design anti-wetting homogeneous metal films or coatings with great stability via by a high-efficiency and low-cost technique with applications in fields of battery, sensors, and electronics, etc. This paper proposed an environment-friendly ultra-low-voltage electrophoretic deposition (EPD) with facile modification post-processing method to fabricate a novel extremely water-repellent functional nano-Al films with evenly loose net-like structures and high purity. The optimized stable suspension consists of water–ethanol with trace nitric acid and polyethyleneimine. Product with an ultra-high contact angle of ~ 171° and extreme low sliding angle of 3 years) with great potential applications. These results provide a novel approach with low-cost and less energy consumption for preparing other functional ant-wetting metal coatings with wide potential applications.

This paper demonstrates how magnetite (Fe3O4) nanopowders with a controlled crystallite size are successfully synthesized from Indonesian ironstone by employing a co-precipitation method. The variation of acidic environments (i.e., pH 9, 10, and 11) during precipitation revealed the influences on their structure, magnetic and microwave absorption properties. The characterization of materials included a combined synchrotron X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS), high-resolution transmission electron microscope (HRTEM), and selected area electron diffraction (SAED) techniques. The magnetic and microwave absorption properties were characterized by vibrating sample magnetometer (VSM) and vector network analyzer (VNA), respectively. The structural characterization of the materials confirmed the formation of a single-phase magnetite which showed sphere-like agglomerated particles with a decreased average crystallite size with precipitation pH. The powders exhibited crystallite sizes of 9.8–13.4 nm. Additionally, the linear combination fitting (LCF) analysis of the XANES data showed a Fe2+/Fe3+ varying composition with pH. We found that, through the EXAFS fitting analysis on the first and second shells, interatomic distance decreased with increasing pH. Moreover, the M–H hysteresis loop demonstrated a ferrimagnetic behavior where the magnetization increased from 51.75 to 77.79 emu/g with decreasing crystallite size. Finally, the microwave absorption properties showed a significant change in reflection loss value from – 4.42 to – 23.11 dB with decreasing crystallite size.

This research paper reports the importance of CdSe/ZnS thin film in improving optical and electrical properties. These thin films were prepared on a deeply cleaned glass substrate using vacuum thermal evaporation under the pressure of 10–5 torr. These films were arranged into a quartz glass tube for rapid thermal annealing (RTA) at 60 and 120 s using a 500Watt halogen lamp. These films were also arranged in a hydrogen gas chamber at 100psi for hydrogenation. The Thermoelectric properties (TEP) and the Seebeck coefficient increase with increasing annealing time, also with introducing hydrogenation it was growing a lot. The UV–VIS–NIR spectrometer has been used to investigate diversity in the energy band gap by tuning annealing and hydrogenation in the range 300–850 nm. The X-ray diffraction (XRD) have been taken in scope 10° ≤ 2θ ≤ 80°, its outcome conform simple cubic structure with lattice parameter 5.4 and 5.04 A for CdSe and ZnS, respectively. The scanning electron microscope (SEM) results investigate that the crystallinity and grain size increase with annealing time. This work is essential in thin film optical devices and solar cell applications.

Power generation characteristics of 0–3-type 0.50(Ba0.7Ca0.3)TiO3–0.50Ba(Zr0.2Ti0.8)O3/PVDF nanocomposites, prepared using a melt-mixing process, under impact loading have been presented in this paper. A solid-state reaction process was utilized to prepare lead-free nanoceramic powder of 0.50(Ba0.7Ca0.3)TiO3–0.50Ba(Zr0.2Ti0.8)O3 (BCZT50) which was then milled by high-energy ball milling technique. The BCZT50 as filler distribution in the PVDF matrix was checked from scanning electron microscope and the formation of BCZT50 and BCZT50/PVDF nanocomposites were ascertained by X-ray diffraction method. The free dielectric constant ( $$\varepsilon_{33}^{T}$$ ), loss tangent (tanδ), piezoelectric coefficient (d33), piezoelectric voltage constant (g33), shore hardness (D), and figure of merit (FoM) were observed to increase while that of applied mechanical force (F3) decreases with the increase in filler concentration. Studies of voltage responses of all the BCZT50/PVDF nanocomposites due to impact loading using drop weight method have been carried out. A marked increment in the contact voltage due to different heights (applied mechanical energy) of impact was noticed as the concentration of filler particles was increased from 0 to 25% in the BCZT50/PVDF nanocomposites. The contact voltage and generated energy increase, respectively, from 5.37 to 11.62 V and 0.53 nJ to 6.8 nJ with the increase in BCZT50 content from 0 to 25% at a height of impact = 21 cm. In addition, the low value of tanδ (~ 10–2), high values of d33, g33, D and FoM along with better voltage responses (proportional to the applied mechanical energy) foreshadowing the prospect of BCZT50/PVDF nanocomposites a better non-lead option for structural health monitoring, piezo-sensing/detection, and/or energy harvesting applications.

In this paper, the Mg35Sb65/Sn15Sb85 superlattice-like films were prepared by magnetron sputtering and the comprehensive properties of were systematically studied. The amorphous-to-crystalline transformation was researched with a situ resistance–temperature measurement system to evaluate the thermal stability. X-ray diffraction, Raman and transmission electron microscopy were employed to explore the change of phase structure at different annealing temperatures. The reversible resistance switching was achieved for [MgSb(7 nm)/SnSb(3 nm)]5-based devices. The results showed that Mg35Sb65/Sn15Sb85 superlattice-like film was a promising phase change material with good thermal stability, fast phase transition and low power consumption.

The discovery of the dopant effects on BaTiO3 has attracted great interest after a compound of 50(BaTi0.8Zr0.2O3)–50(Ba0.7Ca0.3TiO3) system exhibited extraordinarily high piezoelectric properties (d33 > 600 pC/N). Recently, modifications made on the BaTiO3-based piezoelectric materials, particularly at the A-site, have gained the most attention due to the existence of the morphotropic phase boundary (MPB) region. In this paper, we reviewed several dopants that have been extensively used to enhance the piezoelectric and dielectric properties of a BaTiO3 such as Sn and Zr. A ternary triangle of BaTiO3–BaSnO3–BaZrO3 is used to evaluate the correlations between the changes in the Sn- and/or Zr-doped BaTiO3 piezoelectric ceramic properties. The structural changes that have been affected by the dopant contents were also comprehensively reviewed. There is clear evidence that the dopants significantly affect the intrinsic properties of the BaTiO3-based ceramic materials. The dielectric constant er value increases from 1900 to ~ 6000 at room temperature, while the piezoelectric constant d33 value is also increased from 191 pC/N to ~ 600 pC/N. All the compositions described in this review were prepared by using a conventional solid-state route.

In this paper, cobalt-based metal–organic framework (Co-MOF) precursor is synthesized on fluorine-doped tin oxide (FTO) glass through an electrodeposition and solvothermal process. Then, cobalt diselenide (CoSe2-D) film is directly obtained through a selenization process. Meanwhile, Co-MOF film is also fabricated by spraying Co-MOF solution onto FTO glass, and selenized to form CoSe2 (CoSe2-S) film. It is found that CoSe2-S film is composed of particles with porous structure, which is beneficial to increase electrocatalytic active sites and provide more diffusion channels for the I−/I3− redox couples. As a result, CoSe2-S counter-electrode (CE) displays a higher electrocatalytic performance than those of platinum (Pt) and CoSe2-D CEs. The photoelectric conversion efficiency of the dye-sensitized solar cell (DSC) based on CoSe2-S CE is up to 6.86%, which is larger than that of the DSC based on Pt CE (6.36%). The results indicate the potential of using CoSe2 as low-cost and facile CE for DSCs.

Cadmium oxide (CdO) is a promising transparent conducting oxide semiconductor whose optoelectronic and magnetic properties could be improved through doping. The role of synergetic effect between two metal dopants for enhanced optoelectronic and magnetic properties of CdO is not adequately studied. The mono-doping (Zn) and co-doping (Zn, Ni) effects on the optoelectronic and magnetic properties of CdO have been reported in this paper. Undoped, Zn-doped, and (Zn + Ni) co-doped CdO thin films have been deposited by spray technique using perfume atomizer. Crystallite size of pure CdO decreased from 35 to 29 nm with Zn doping and to 22 nm with (Zn + Ni) co-doping. Lattice parameter value of pure CdO decreased from 4.676 A to 4.669 A with Zn doping and with Ni co-doping it got reduced to 4.664 A. Surface morphology improves with Zn and (Zn + Ni) co-doping. Better optical transparency and widened band gap values were realized for the Zn and (Zn + Ni) co-doped films. Oxygen-related peaks were observed in the PL spectra of all the films. Increased Haacke’s quality factor was observed for the (Zn + Ni) co-doped CdO thin films. Paramagnetic-to-ferromagnetic transition has been realized for the co-doped films. The results obtained infer that the (Zn + Ni) co-doped CdO thin films are well suited for optoelectronic and spintronic device applications.

Recently, a kind of tree-like CdS nanorods-Si pillars structure were fabricated by hydrothermal method in our paper. The CdS nanorods tended to grow into branches with a diameter of 100 nm and a length of more than 500 nm, while the Si pillars tended to grow into trunks with an average diameter of 250–900 nm. The CdS nanorods were directly synthesized on the Si pillars surface with the glutathione served as a source of capping agent. During the reaction process, a seed layer of CdS film about 50 nm thickness was deposited on the Si pillars surface firstly, and then the CdS nanorods grew upon the seed layer. The XRD curves showed that the CdS nanorods with hexagonal morphology were well-crystallized on the Si pillars surface. Si pillars with different diameters and heights were used as substrates for CdS nanorods growth. As the CdS nanorods grow on the Si pillars, the reflectivity of all kinds of Si pillars were decreased to below 5% for wavelength ranging from 350–450 nm. The photoresistor of CdS nanorods on Si pillars with 900 nm average diameter and 2 μm height had the best photosensitivity performance under different illumination.

The healthcare sector is always focused on the development of innovative functional nanomaterials, approaches, and devices for the detection of metabolites to cure and control the critical diseases. In this context, the present paper reports the synthesis of an axially oriented, biocompatible ternary hybrid composite of zinc oxide, polyaniline, and chitosan by in situ polymerization and composite formation technique. The prepared materials were characterized by Fourier transform-infrared spectrometer, X-ray diffraction, scanning electron microscope, and two-probe method. The analytical result designates the formation of ZnO-encapsulated polyaniline grafted chitosan (ZnO-en/PANI-g-CHIT) composite with improved electrical conductivity, chemically stability and self-activating in nature. Furthermore, a film of ZnO-en/PANI-g-CHIT hybrid matrix was casted onto an indium tin oxide coated glass slide by spin coating technique for potentiometric sensing of urea after immobilization of ureasee. Thus, obtained film was found suitable as an electrode with a sensitivity of 187.5 µV ppm−1 cm−2, response time of 3 min, recovery time of 30 s and limit of detection 29.84 ppm for self-activating potentiometric urea sensing in the range of 20 ppm to 500 ppm of natural as well as artificial samples. Fabricated bio-electrode was stable for eight weak with consistent sensitivity as well as highly specific for urea sensing in the presence of respective interferents in comparison to several reported urea sensors. Furthermore, it is proposed that the developed urea sensor could be a promising sensing strategy for advanced clinical applications because of comparable performance to commercial method.

In this paper, a reduced graphene oxide/bi-MOF-derived carbon (RGO/bi-MDPC) composite is studied as high-performance microwave absorber with tunable dielectric properties. The dielectric parameter of the RGO/bi-MDPC could be optimized by changing annealing temperature. The optimal sample presents the excellent microwave absorbing performance with the effective absorption bandwidth covering the whole X band with a thickness of 3.4 mm while the minimum reflection coefficient reaches − 33.8 dB at 8.8 GHz with the thickness of 3.7 mm. The specific porous structure, residual oxygen functional groups, and abundant interface contribute to enhanced microwave absorption performance. This work indicates that the bi-MOF-derived porous carbon could be used as nanostructured phase to improve the microwave absorptive capacity of RGO composites.

In this paper, a diagnostic tool for magnetron sputtering deposition of copper oxides is presented. The copper oxide thin films were deposited in DC-MF mode for various argon/oxygen mixtures, including deposition in a pure oxygen atmosphere (fully reactive mode). The copper oxides were deposited on quartz glass substrates and carbon foils. The deposition process was monitored using optical emission spectroscopy. The films were further analysed by X-ray diffraction (XRD), optical measurements, and Rutherford backscattering spectroscopy (RBS). The obtained results confirmed that optical emission spectroscopy (OES) can be used as a diagnostic tool for magnetron sputtering technology that enables control of the sputtering mode, and therefore, the deposition of pure metallic (Cu) and various oxide (Cu2O, CuO) films can be performed. The results show that by increasing oxygen content in the argon/oxygen mixture, the sputtering rate is reduced; however, in the oxygen, at 40–100% range, it is stabilised at 12 nm/min.

The aim of this work is to assess the prospects of using CuBi2O4 composite films of various thicknesses as protective coatings against exposure to ionizing radiation of up to 150 MeV and doses of 1 × 1013–1015 ion/cm2, characteristic of the effects of overlapping cascade defects in the target. The relevance and novelty of the study lies in the search for alternative sources of screening for the effects of radiation damage to microelectronic devices without a significant increase in the mass–overall dimensions of microcircuits. This paper presents the results of a study of the radiation resistance of the structural, mechanical, and strength properties of synthesized CuBi2O4 films depending on the film thickness and radiation dose. Electrochemical deposition was used as a synthesis method, which allows one to control with high accuracy the phase composition and morphology of the synthesized films. Synthesized films were shown to possess a significant degree of stability to irradiation with the increasing film thickness from 5 to 10 μm. Moreover, in the case of films with a thickness of 3 μm, a decrease in the strength and structural properties is due to phase transition processes initiated by irradiation due to the transfer of energy to the crystalline subsystem as a result of elastic and inelastic collisions.

This paper reveals the structural, magnetic and heating ability of citric acid coated Fe0.3Mn0.7GdxFe2−xO4 (x = 0, 0.02, 0.04, 0.06, 0.08 and 0.1) nanocrystalline ferrites. The synthesis of Gd-dope ...

This paper offers a simple, low-cost, and effective method to prepare high-performance dielectric elastomer. 4-chorophenethyl alcohol as dipole functionalizes crosslinker and then the functional crosslinker is utilized to prepare a novel dipolar silicone elastomer (SRCl). The introduction of dipole reduces regular arrangements of molecular chains and the dispersive crosslinking is formed in SRCl. The dipolar crosslinkers are evenly distributed in the crosslinking network, so the mechanical, dielectric, and electromechanical properties are improved. The dielectric elastomer actuator made of the SRCl with 15% dipoles exhibits a maximum actuated strain of 9.97% and the SRCl with 12% dipoles shows the highest breakdown field strength of 73.33 V/μm, which is increased by 156% and 52%, respectively, compared with pure silicone elastomer (SR, 3.89% at 48.23 V/μm). In addition, barium titanate (BT) nanoparticles as filler is mixed with SRCl to prepare the SRCl/BT composites. It is found that the dielectric property of composites is dominated by the matrix polarity. The electrostatic interaction between hydroxyl groups on BT nanoparticles and chlorine groups on the SRCl matrix improves the dispersion of BT nanoparticles in SRCl matrix. The maximum actuated strain of SRCl/20% BT (11.97%) is 3 times as high as SR (3.89%).

The present paper details on the synthesis and characterization of the modified Graphene and its moisture sensing application. The characterization tools as Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), Electron Dispersive X -rays (EDX), Particle size distribution, Fourier-Transform Infrared (FTIR), UV–Vis spectrophotometry and Raman are employed for characterizing the synthesized material. The BET demonstrations of the synthesized material have a specific surface area as 10.55 m2/g together with pore size distribution range from 10.34 to 97.44 nm, confirming the mesoporous material. The SEM, EDX, FTIR, UV–Vis spectroscopy and Raman analysis of the synthesized material confirmed that it is the modified Graphene (m-Graphene). Presence of the ID/IG = 1.55 confirms more defects along with many dangling bonds which are more beneficial for the humidity detection. The humidity sensing characteristics of m-Graphene based sensor have been observed from 100 Hz to 10 kHz frequencies and the best sensitivity was found at 100 Hz. The sensor shows high sensitivity of 2.51 MΩ/%RH along with the calculated repeatability, response and recovery time of 96.05%, 24 and 13 s, respectively, at room temperature.

In this paper, one-step hydrothermal method was used to prepare the graded titanium dioxide hollow microspheres, and the {001} crystal plane was exposed. The silver oxide nanoparticles were deposited on the exposed crystal face of titanium dioxide by wet chemical coprecipitation to form Ag2O/TiO2 composite material. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption (BET), and so on. The degradation abilities of Ag2O/TiO2 composite materials with different molar ratios to rhodamine B were studied under UV–Vis irradiation. And then the mechanism of photocatalytic degradation was analyzed. The experimental results showed that when the molar ratio of titanium dioxide to silver nitrate was 4:1, the degradation effect was best, and the degradation rate reached 95.4% in 80 min. This outstanding photochemical catalysis performance was mainly due to good cooperation, including exposure of specific crystal planes of TiO2 hollow microspheres and highly scattered Ag2O nanoparticles, and the p–n heterostructure between Ag2O and TiO2 will induce efficient charge separation efficiency.

The present paper reports the investigation of structural, electrical, dielectric, and transport properties of the polyethylene oxide (PEO)-based polymer nanocomposite (PNC), with sodium hexafluorophosphate (NaPF6) salt and barium titanate (BaTiO3) as nanofillers. The PNC has been prepared via standard solution casting technique. The structural investigation has been investigated by X-ray diffraction and evidence the enhancement in amorphous content. The morphology has been examined by Field emission scanning electron microscopy technique and confirms the composite formation. The presence of polymer–ion and ion–ion interaction has been confirmed by the Fourier transform infrared spectra (FTIR) and evidences the PNC formation. The impedance spectroscopy has been performed to evaluate the ionic conductivity in the temperature range 40–100 °C. The increase of conductivity is obtained with the addition of nanofiller and temperature-dependent conductivity follows Arrhenius behavior. The PNC film having the highest conductivity exhibits low activation energy and indicates the fast ion migration. The ion transference number is close to unity and the voltage stability window is within the desirable limit. The complex permittivity and complex conductivity have been obtained and the plot has been fitted in the whole frequency window. The fitted plot is in perfect agreement with experimental data. The PNC having the highest conductivity has high dielectric strength and low relaxation time. It confirms the nanofiller role in enhancing ion migration. The ion transport parameters (n, μ, D) are also in correlation with impedance and dielectric analysis. The optimized PNC films have been used to prepare the Electric double-layer capacitors (EDLC) and it demonstrates the improved performance which may be attributed to the effective role played by nanofiller in boosting ion dynamics.

This paper presents the results of studying the processes of defect formation caused by irradiation with protons with an energy of 1.5 MeV and doses of 1 × 1015, 1 × 1016, 1 × 1017 ion/cm2 in ceramics based on aluminum nitride. The choice of radiation doses is due to the possibility of modeling atomic displacement (dpa) values of 0.56, 5.6, and 56 dpa, respectively. An analysis of structural changes showed a significant stability of the crystal structure at irradiation doses comparable to 0.56, 5.6, while an increase in the displacements up to 56 dpa leads to a significant increase in distortions of the crystal structure and its disordering due to the effect of accumulation of defects in the structure, as well as to hydrogenation processes. The totality of the data obtained indicates a fairly high degree of resistance to proton irradiation and the subsequent evolution of defects in the structure of nitride ceramics; however, at high doses of radiation, microcracks form in the surface layer, which leads to a sharp deterioration in the strength properties due to a large number of dislocation and point defects.

This paper focuses on the impact of yttrium nitrate salt (Y3+ ions) on the microstructural, mechanical, optical, and dielectric characteristics of poly(vinyl alcohol) (PVA) films. Simple solution casting technique was used to synthesize yttrium nitrate salt-doped PVA of different weight percent. These films are characterized using various methods such as differential scanning calorimetry, X-ray diffraction, stress–strain, UV–visible spectroscopy, and dielectric measurements. The thermal study reveals the reduction in the glass transition temperature Tg by a rise of Y3+ ions in the PVA matrix. The degree of crystallinity $${X}_{c}$$ and X-ray diffraction results support the increase of the crystallinity of PVA due to the doping effect. The mechanical characteristics of PVA: Y3+ ions’ films like Young's modulus are reduced, but the percentage elongation at break is raised, by the increase of Y3+ ions content. UV–Vis spectroscopy has been used for the optical characteristics of the studied films, demonstrating the transmittance of UV–Vis films is decreasing with the rise of Y3 + ions content in the composites. The bandgap Eg of Y3+/PVA films is significantly reduced with the addition of Y3 + ions. The changes in optical characteristics of PVA are ascribed to the interaction of Y3+ ions with the PVA matrix. Also, the dielectric constant measurement of the studied polymeric composites examined and revealed a highly attractive dielectric constant for the dielectric media. With the increase in the incident frequency, both the dielectric constant and dielectric loss of the studied films is decreased exponentially. At the same time, the AC electrical conductivity is improved with increasing the Y3+ ions content. Y3+/PVA films have unique properties to be used in a different field such as electronic, optoelectronic, and device fabrication.