The pressure dependence of electronic and optical properties for InPxAsySb1−x−y alloys lattice matched to InAs substrate has been investigated. The mechanical properties and the phonon frequencies for InPxAsySb1−x−y/InAs system under the effect of pressure have been studied. The physical properties of the binary components InP, InAs and InSb that constitute the quaternary alloy were used in this analysis

Chemical solution deposition technique has been utilized to grow polycrystalline PZT thick films on Pt/Ti/SiO2/Si and TiO2-buffered Pt/Ti/SiO2/Si substrates. Effect of thin TiO2 buffer layer on the structural, dielectric and electrical properties of PZT films has been investigated in the present work. Polycrystalline single-phase PZT thick film is achieved using the buffer layer of TiO2. The disappearance

In this paper, we present the synthesis and studies of physical properties of the ferroelectromagnetic composites (1–x)PbMn1/3Ta2/3O3–xPbTiO3 [(1–x)PMnT–xPT], which exhibit a relaxor behavior. Using a synergistic application of scanning electron microscopy (SEM), X-ray structure analysis, and energy-dispersive X-ray analysis (EDX), we revealed that two phases always coexist in the synthesis of the

The development of the current technology has increased the requirement for the versatility of acoustic metamaterials. In this study, the band gap (BG) tuning of the stretch-dominated thermal expansion lattice metamaterials with different configurations composed of triangular units is studied using the finite element method, and a design method for metamaterials tuned by external temperature changes

In this contribution, we reported our findings on NdFeO3–PbTiO3 composite system synthesized by conventional solid-state reaction route. The cell parameters, density and bond lengths (Fe-OI, Fe-OII) are determined by Rietveld refinement of X-ray diffraction data. Phase purity of the system was further confirmed through Fourier transform infrared (FTIR) and Raman spectroscopy techniques. The FTIR spectra

CuFe2O4 is synthesized by the co-precipitation method, and the hydrothermal method was used to prepare RGO (4, 8 and 12 wt.% reduced graphene oxide)/CuFe2O4 nanocomposites. The lattice parameter value of copper ferrite either in composite or in pure form was the same. Average grain size is reduced with the RGO concentration from 70 to 30 nm in nanocomposites. Copper ferrite is very well distributed

Metal–organic frameworks (MOFs)-based electrode materials have drawn wide interest in energy storage applications. Herein, a nickel-based metal–organic framework (Ni-MOF) has been synthesized by simple hydrothermal reaction with different reaction times. The hydrothermal reaction time has an impact on the energy storage performance of the synthesized material. Structural characterization confirms the

Recently, single-layer black phosphorous (phosphorene) has engrossed significant attention because of its considerable electronic properties. The remarkable properties of phosphorene, including high charge carrier mobility and semiconducting behavior, opened a view of its applications in nanoelectronics, nanosensing and 2D-material engineering. We investigate the effects of some gas molecules such

ZnO nanoparticles/quartz surface acoustic wave (SAW) humidity sensors were fabricated, and their sensing performance was investigated. The pristine ZnO deposited on ST-cut quartz substrates by radio frequency magnetron sputtering is nanoparticles with grain sizes of 20–50 nm. The comparative analysis for humidity sensing applications of SAW-Love devices based on ZnO sensitive layers with different

The spin Hall magnetoresistance (SMR) at Pt/ Y3Fe5O12(YIG) interfaces with (100)-, (110)- and (111)-oriented YIG films was studied. Before that, high-quality YIG films were fabricated on Gd3Ga5O12 (GGG) substrates by pulsed-laser deposition and the structure, magnetic property and damping of YIG films with different crystallographic orientations were compared and analyzed. By angle-dependent magnetoresistance

The paper investigated the Zigzag GaN nanoribbons (ZGaNNR) using the density functional theory(DFT) and non equilibrium Green’s function(NEGF) framework. We have calculated the structural, electronic and transport properties of various Fe-ZGaNNR configurations. Based on the binding energy(\(E_{B}\)) calculations, Fe-doped@Ga_edge ZGaNNR(-6.51eV) is observed to be most structurally stable among different

Bioceramic compositions based on zirconia/hydroxyapatite (HAP) modified with silver ions (Ag) at different additional zirconia nanoparticles were fabricated. The obtained compounds were characterized upon their structure using XRD and TEM, besides their morphological features using FESEM. Zirconia nanoparticles were trapped into HAP lattice for the as-prepared composition, however, for annealed one

In this work, the ferric cobalt sulfide/aminated graphene quantum dots (FeCo2S4/NH2-GQDs) nanoflowers grown on Ni foam substrate have been successfully fabricated via a facile two-step hydrothermal method. The as-prepared FeCo2S4/NH2-GQDs nanoflowers can expose plenty of electroactive sites, provide fast charge transfer paths and buffer the drastic volume change during long-term charge–discharge cycles

The outstanding properties of graphene oxide and its magnetic nanocomposites are triggering extensive interests of scientists, whereas how to fully optimized the integrated functions for the fabrication of gamma ray sensor systems with unique attributes remains to be a challenge. Here, we report a facile approach to produce Fe3O4/ graphene oxide nanocomposites in polyvinyl acetate and polymethyl methacrylate

Lead-free Na0.5K0.44Li0.06NbO3 + xWO3 (x = 0–0.08) piezoelectric ceramics were prepared by the conventional solid-state sintering technique. The effect of WO3 content on the crystal structure, piezoelectric properties, and temperature stability was investigated. X-ray diffraction and Raman analysis showed that all the Na0.5K0.44Li0.06NbO3 + x WO3 ceramics specimens (with exception of x = 0.08) sintered

In this paper, we have prepared porous silicon non-enzymatic sensor (Ag/Ps/Si/Ag), using p-type silicon wafer cut into homogeneous pieces, the galvanostatic electrochemical etching process was carried out at different etching duration and constant current density. Optical measurements such as UV spectroscopy and Photoluminescence were performed to calculate the energy gap value and notice the effect

In this work, the effects of (Ba0.8Ca0.2)TiO3 (abbreviation BCT) addition on microstructure and electrical properties of (0.9-x) (Bi0.5Na0.3K0.2)TiO3-x (Ba0.8Ca0.2)TiO3-0.1BiFeO3 Pb-free ceramics (x = 0.0, 0.025, 0.05, 0.075, and 0.1) were investigated. Single-phase perovskite structure and high density have been obtained in all sintered ceramics. The crystal structure was found to change from tetragonal

Ferroelectric materials have great potential use for solid-state refrigeration. However, their working temperature is restricted to Curie temperature; the working temperature can be increased by the new component of strain gradient-driven caloric effect or flexocaloric effect (FCE). The FCE relies on the inhomogeneous strain of the crystal lattice to induce polarization in centrosymmetric crystals

The magneto-, electrical- and thermal-transport properties of SrRuO3 (SRO) films have been investigated. The magnetization (M), relative resistivity (Δρ) and relative Seebeck (ΔS) near TC follow a scaling law, M ~ (TC−T)α, ΔρSP ~ (T−T)2β and ΔS ~ (TC−T)2γ, respectively. The values α = 0.394, β = 0.401 and γ = 0.421 for the (001)-SRO thin films are well fitted with mean-field critical exponents. While

Melt electrowriting (MEW) approach with constant working distance has been developed to weaken the charge interferences and to enhance the architecture mechanical strength, by which various stacked architectures with high aspect ratio can be achieved. The deposited fiber guides the subsequent jet to print layer by layer along the pre-designed patterns without fiber pulsing. The position of the nozzle

The geometric structure of 38-atom AgPd and AgCu nanoalloys is obtained by the genetic algorithm and density functional theory for all compositions and their surface phase stability diagrams are established to provide a clear image for the initial oxidation process. Ag surface segregation is confirmed for both AgPd and AgCu nanoalloys in vacuum. Pure Pd and Cu nanoparticles have lower surface phase

In this paper, a T gate head AlGaN/GaN high-electron-mobility transistor (HEMT) on BGO substrate is proposed and optimization is done for channel length, gate length and gate position. The dc and ac characteristics of the devices under consideration are analysed using Silvaco TCAD software. The threshold voltage and transconductance of the proposed HEMT are extracted from the DC characteristics. The

The aim of this work is to investigate the bulk stability of the solar-grade silicon versus the temperature processing, as well as the surface passivation versus the chemical oxidation. To this end, the quasi-steady-state photo-conductance (QSSPC) measurements showed degradation in minority carrier lifetime (τeff) after high-temperature processing that involves instability of the silicon wafers face

Citrate sol–gel method has been employed for synthesis of Zn1˗x˗yMnxCryO nanomaterials. Binary Zn0.9Mn0.1O and Zn0.9Cr0.1O nanomaterials were prepared and their optical and magnetic properties were investigated as reference compositions for the individual behavior of both of Mn- and Cr doping, respectively. The synthesized nanoparticles were analyzed using X-ray diffraction (XRD), high resolution transmission

Rapidly solidified (RS) binary Sn–5 wt.% Sb and ternary Sn–5 wt.% Sb– x wt.% Ag, x = 1, 3 and 5 solder alloys were prepared in form of ribbons using melt spinning technique (MS). X-ray diffractometer (XRD), scanning electron microscopy (SEM) attached with energy dispersive x-ray technique (EDX) and differential scanning calorimetry (DSC) were used to investigate the impacts of Ag contents on microstructures

AISI 304 (SS(304))- and AISI 316 (SS(316))-type stainless steels were coated with 250 nm thickness Ni thin films and post-annealed at different temperatures (423 K, 623 K, 773 K and 923 K) with a constant flow of oxygen (600 sccm). This procedure was carried out to oxidize the Ni thin film which has excellent chemical stability and highly improved the corrosion resistance of steel in sulfuric acid

Facile chemical precipitation method was used to synthesize Ni (4%) doped and Co (4%): Ni (4%) co-doped CdS nanoparticles. Polyvinylpyrrolidone (PVP) was used as a surfactant to control the particles size and growth rate. The synthesized co-doped sample showed mixed structures of cubic and hexagonal which was confirmed by X-ray diffraction (XRD) study. Average crystallite size is to be 4.2 nm and 3

The SrFe11MnO19/CoFe1.9Bi0.1O4/PANI nanocomposites were prepared with different mass ratios of SrFe11MnO19/CoFe1.9Bi0.1O4 to PANI by the auto-combustion sol–gel and in-situ polymerization methods. The nanocomposites were analyzed with several techniques such as FTIR, XRD, VSM, and VNA. The Fourier-transform infrared spectroscopy (FT-IR) analysis shows that all pure PANI absorption bonds (exception

Mn-based magnetic alloys and compounds having large magnetic anisotropy are currently focused as alternate materials for various spintronic applications. In this work, magnetization behavior of Co3Mn alloy nanowires (NWs) was investigated by fabricating with well-known template-based electrodeposition method where the electrodeposition was carried out at sinusoidal high voltage. The NWs were annealed

Herein, superhydrophobic 4037 aluminum alloy surface with self-cleaning and anti-icing properties has been fabricated by a low-cost processing consisting of HCl/H2O2 treatment and modification of an ultra-low concentration of fluoroalkylsilane. Via a chemical etching, a coral-like hierarchical micro-nano structure has been formed on 4037 aluminum alloy substrate. Then, the wettability of etched surface

ZnO thin films were successfully deposited via spray pyrolysis technique over various substrates, including glass, silicon, and mesoporous silicon (PSi). The effect of substrate type on the surface morphological, structural, and electrical properties of ZnO thin film was investigated. Scanning Electron Microscopy confirms the morphology of the meso-PSi substrate and displays the morphologies of the

The optoelectronic characteristics of AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) with quaternary last quantum barrier (QLQB) and step-graded electron blocking layer (EBL) are investigated numerically. The results show that the internal quantum efficiency (IQE) and radiative recombination rate are remarkably improved with AlInGaN step-graded EBL and QLQB as compared to conventional

In a recent work, the extremely anomalous mechanical behavior of the anhydrous zinc and cadmium oxalates was discovered. In this paper, the mechanical behavior of the anhydrous mercury oxalate containing the remaining transition metal element of the IIB group of periodic table is investigated. The crystal structure and elastic properties of \({\text{HgC}}_{2} {\text{O}}_{4}\) are determined using first-principles

We proposed a silicon-based monolithic integrated multi-wavelength InAs/GaAs quantum dot microring laser array with radially coupled waveguides. To achieve the stable multi-wavelength lasing of the laser array in the 1.3 μm band, the three-dimensional finite-difference time-domain method is used to numerically optimize structure parameters of the microring laser with a connected III–V waveguide. The

We analyze vacuum storage-assisted transformation of laser-textured aluminum, copper and stainless steel from hydrophilic to hydrophobic state that occurs only in the case of vacuum pump that uses mineral oils and additives. Energy-dispersive X-ray spectroscopy measurements demonstrate an increase in the carbon-containing components on the metals surface with the increase of the storage time inside

The charge-plasma based dopingless (DL) tunnel field effect transistor (TFET) is considered as an emerging TFET structure resulting from its immunity against random dopant fluctuations and not requiring high thermal budgets and expensive annealing methods for fabrication. But, temperature sensitivity is a major concern to predict the reliability of a device as the bandgap of semiconductor material

In this article, we report a detailed study on the influence of sputter power on physical properties of the NiO films grown by DC magnetron sputtering. Structural studies carried out by Grazing Incidence X-ray diffraction (XRD) reveals the polycrystalline nature of the films with FCC phase. The crystallographic orientation (111) plane followed by (200), (220), and (311) plane were evident from the

Legged locomotion of robots can be greatly improved by bioinspired tribological structures and by applying the principles of computational morphology to achieve fast and energy-efficient walking. In a previous research, we mounted shark skin on the belly of a hexapod robot to show that the passive anisotropic friction properties of this structure enhance locomotion efficiency, resulting in a stronger

The electric-field-enhanced effect of permittivity is one of the most important physical properties of KTa1-xNbxO3 in paraelectric, thus greatly affecting the performance of electro-optic modulator and deflector. We studied the temperature dependence of the electric-field-enhanced effect and the effect of supercooling on it. We found that this enhanced effect is closely related to the Fröhlich entropy

Nickel-titanium shape memory alloys have attracted notable interest for biomedical applications due to their unique properties. However, there are still some concerns on the potential release of nickel ions causing adverse reactions in-vivo at high concentrations. In this work, samples were coated with a polyvinyl alcohol/gelatin hydrogel. Coating stability, corrosion resistance and biocompatibility

Carbon dots (CDots) are characterized by their optical properties including strong absorptions, bright fluorescence emissions, and electron acceptor and donor behaviors in the visible spectrum. In this study, aconitic acid and oligomeric polyethyleneimine were used as precursors to prepare PEI/AA-CDots by vigorous microwave-assisted thermal carbonization. The as-prepared CDots exhibit excitation wavelength-dependent

In this article, the aim is to establish the correlation between the calcination temperature and dielectric properties of BaTiO3 nanoparticles including gas sensing properties. For this purpose, the BaTiO3 nanoparticles have been synthesized using the sol–gel method with low-temperature hydrolysis with varying calcination temperature and time. The structural, morphological, elemental, chemical, dielectric

In this study, experimental photovoltaic performance and numerical simulations are compared for perovskite solar cells devices with MoS2 hybrid hole transporting layer (HTL) structure. Experimentally, it is established that the incorporation of MoS2 with 2 mg/ml concentration effectively acts as a barrier to ion migration and minimizes the shunt contact. The optimum absorber thickness, defect density

Herein, we report terahertz (THz) shielding of flexible MXene (Ti3C2Tx)/MWCNT/PVA polymer composite films by using THz time-domain spectroscopy (THz-TDS) in 0.1–2.0 THz frequency range. The polymer composite with 42 µm thickness exhibited an excellent shielding effectiveness of 36 dB at 2 THz which is much higher than most of the reported materials for THz shielding with comparable thickness. The absorption

Herein, a nanocomposite of Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/reduced graphene oxide (PEDOT:PSS/rGO) has been synthesized and modified with L-Cysteine (CySH) peptide in order to reveal the selective and sensitive determination of lead Pb(II) ions using electrochemical modality in the range of concentration 1–70 ppb. The PEDOT-PSS/rGO/CySH nanocomposite was characterized with X-ray

In the series soldering step of photovoltaic module manufacturing process, soldering could be occasionally found weak or missing between busbar and interconnection ribbon. The affected modules have local heating phenomenon in application, which aggravates modules efficiency degradation. Electroluminescence (EL) technology can detect many module defect types including weak soldering. But the grayscale

In this work, the quaternary nanostructure La0.8−xCexAg0.2MnO3 perovskite was synthetized by conventional solid-state method and calcination in air at 900 °C for 24 h. These materials are one member of perovskite-containing manganite, and rare earths and Alkali elements in A and B sites, respectively. The effect of La substitution on the crystallite size and microstrain of the X-ray diffraction (XRD)

Metal–semiconductor-metal (MSM) infrared photodetector-based Ag/CuO NW/Ag was fabricated using glancing angle deposition technique integrated RF sputtering machine. The transmission electron microscope confirmed the average length and diameter of the fabricated CuO NW were ~ 450 nm ± 7 nm and 135 nm ± 5 nm, respectively. Moreover, selective area electron diffraction pattern showed that the growth NW

In this paper, a theoretical method is presented to calculate third-order nonlinear optical susceptibility resulting from electrostriction (TNSRE) in metamaterials. The presented model is based on homogenization and effective medium theory. We have demonstrated that electrostriction is the dominant mechanism in the enhancement and suppression of the TNSRE. To provide a comprehensive framework that

Ferroelectric phase has been discovered in dense sodium niobate NaNbO3 ceramic sintered by two-step method. At ambient temperature, its absolute principal rhombohedral phase R3c rather than antiferroelectric phase Pbcm was detected by X-ray diffraction measurements. And its grains with small size were observed by scanning electron microscope. Its changes of dielectric properties, enhanced ferroelectricity

The undoped zinc oxide (ZnO) and carbon-doped zinc oxide (C:ZnO) thin films were synthesized with different process temperatures by using a chemical vapor deposition technique. The fractal dimension of AFM images was evaluated by power spectral density function, spatial function distribution, cube counting, and triangular counting by Gwyddion software. AFM results reveal undoped and C:ZnO indicated

Utilizing molecular dynamics simulations, the authors investigate the notion of bimodal nanotwinned (NT) microstructure in strength-ductility trade-off. Using a coarse circular grain with twins embedded in a sea of nano-grains (without twins) as a surrogate, the paper explores three scenarios pertaining to the strength and failure strain mapping: (i) the effect of twin boundary (TB) inclination; (ii)

The polycrystalline NdMn2O5 multiferroic was synthesized by wet chemistry method followed by heat treatment at 1000 °C. The structure was confirmed by X-ray diffraction (XRD) as orthorhombic with space group Pbam. The particle size and strain were calculated by Williamson-Hall method. Both infrared (IR) active and Raman active phonons have been observed using IR reflectivity and Raman spectroscopies

A series of Fe3-xGdxO4 (x = 0, 0.1, 0.2) nanoparticles with an average diameter of around 8 nm were prepared by the coprecipitation method and coated by citric acid (CA). The nanoparticles show superparamagnetic behavior at room temperature and transition to a blocked state, at a temperature from ~ 89 K to ~ 213 K, depending on Gd concentration. The saturation magnetization of Fe3-xGdxO4 tended to

The photocatalytic degradation technology has great application potential due to its green, thorough and efficient ability to remove tetracycline hydrochloride (TCH). In this work, the ZnO/H4Nb6O17-NT composite was synthesized through a simple hydrothermal co-assembly process and its photocatalytic performance for decomposition of TCH under visible-light irradiation was investigated. Physicochemical

Co0.5Mg0.5-xCuxFe2O4 (x = 0.0, 0.2 and 0.4) nanoferrites were prepared by sol–gel auto combustion method. XRD, FT-IR, and HRTEM studies revealed the single-phase spinel cubic crystal structure of all samples with Fd-3 m space group. The lattice constant, calculated using the XRD data, was found in the range 8.3936–8.4735 Å. The average crystallite sizes were found to be in the range of between 38.8