As an important part of the information revolution, integrated circuits have been developing in a short, light, and high-integration direction in recent years. According to the international semiconductor technology route, copper has encountered bottlenecks in the 22-nm technology node and it is difficult to keep up with the data throughput of processors. The increase of Cu resistivity is aggravated

The behavior of Ag/Au/Cu nanoparticles dispersed on Si substrates during heat treatment was studied by molecular dynamics in this paper. Whether for the thermal welding of homogeneous metal nanoparticles or heterogeneous metal nanoparticles, it was found that the fundamental reason for the contact between the surface of metal nanoparticles is the electron exchange, which reduces the energy of the system

Owing to high hardness and high brittleness of SiC ceramic, it is difficult to machine into structural ceramic components with desired surface quality and dimensional accuracy. In this paper, a method of polishing SiC ceramic by underwater femtosecond laser was proposed. The influence of laser frequency and pulse energy on surface morphologies, 3 D profiles, depth and surface roughness of polished

A femtosecond laser was used to process micro-holes on the nickel-based superalloy with thermal barrier coatings. Scanning electron microscope (SEM) was used to observe the morphology of micro-holes inlet, outlet and the side wall. The changes of morphology with laser focusing position and laser power were analyzed. The results showed that the micro-holes processed by femtosecond laser required a certain

In this paper, a CSVO3 phosphor for white LED has been successfully prepared by solid-state synthesis and has been characterized. The CsVO3 was simulated by Materials Studio software based on density functional theory (DFT). The results show that the CsVO3 sample has a direct optical transition with band gap energy of 3.143 eV. Under ultraviolet excitation in the range of 300–390 nm, the emission spectrum

ZnO nanopowders with hexagonal wurtzite structure were synthesized by hydrothermal method with different concentrations of Fe. X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy The morphology, structure and optical properties of the samples were tested and characterized by XPS and (photoluminescence) PL spectra.The results show that the

Nano-BiOBr photocatalysts were successfully prepared by Microwave method using ethylene glycol solution. The nano-BiOBr photocatalysts were characterized and analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-visible diffuse reflectance spectroscopy (UV-Vis DRS), and the degradation ability of nano-BiOBr photocatalyst to adsorb rhodamine B (RhB) was also explored. The results

According to the analysis of the damage morphology of the failure insert in the heavy-duty milling process of the water chamber head, fatigue damage is one of the main failure forms of the insert. Fatigue is the evolution process of inserts damage and impact fracture is the ultimate failure forms of inserts fatigue damage. According to the frequency that the insert cuts into and out workpiece, it is

In this paper, the geometric deformation and atomic behavior evolution of silver nanowires subjected to laser are simulated by non-equilibrium molecular dynamics method. The simulation results show that due to the surface plasma resonance effect of the laser, significant atomic diffusion occurs in the contact area of the two silver nanowires. With the increase of the irradiation time of the laser,

The thermal welding process of Ag nanoparticles was studied by molecular dynamics using embedded atoms method (EAM), and the melting point of Ag nanoparticles was analyzed by radial distribution function (RDF) and root mean square displacement (RMSD). The results show that for Ag nanoparticles with diameter less than 10 nm, driven by surface energy, the welding temperature will be much lower than the

This article is focused on buckling characteristics of fully profiled sandwich structure based on polyethylene terephthalate (PET) substrate and thicker Multi wall carbon nanotubes (MWCNT) which are bonded together using separate adhesives, Therefore this research article represents a new design and 3-D finite element analysis. Debonding mechanism for different MWCNTs layer number at a constant normal

Recast layer (RL) is a major defect in laser drilling of micro holes. In this study, some methods to reduce RL in micro-hole drilling were carried out by using a pulsed Nd:YAG laser (λ = 1.06 µm) on a type 304 stainless steel. Based on the previous optimization of laser parameters, trepanning velocity and rotation number in laser trepan drilling were specially studied of their effect on RL. Single-factor

In this article, we demonstrated the fabrication of micro-supercapacitors by photolithography technology and liquid-air interface self-assembly method. A large-area uniform film with a thickness of 18 nm was fabricated by the modified liquid-air interface self-assembly, and a narrow finger gap, which was 30 μm, was manufactured by photolithography. In addition, the electrode width and the interdigital

Solid wastes exhibit excellent prospects in the removal of heavy metals from contaminated water. However, raw solid waste materials usually show mediocre uptake efficiency, it is imperative to functionalize or transform them into new solid waste-based materials. The present work provides a novel technique by utilization of silica fume waste for Ni2+ removal from wastewater. The sorbent was prepared

The electric field distribution of Ag nanoparticles under femtosecond laser is simulated by solving Maxwell equations in this article. The results show that with the same laser energy, the coupling electric field between adjacent nanoparticles becomes stronger and stronger as the spacing between nanoparticles decreases, while the enhancement factor decreases rapidly when the spacing between nanoparticles

Bacterial infection is a major challenge for contemporary medicine, and antimicrobial hydrogels have been extensively studied for their excellent antimicrobial activity. However, the antibacterial agent also has high cytotoxicity and hemolytic activity while being significantly antibacterial. In this paper, we prepared a hydrogel by simple heating-cooling of ZIF-90 doped agar solution, which has obvious

With the development of electronic information technology, the fabrication of transistors based on bulk (3D) semiconductor materials has encountered bottlenecks. In view of this situation, many researchers have focused on manufacturing two-dimensional nanostructures from one-dimensional nanomaterials to apply to transistors. Based on the experimental platform of femtosecond pulsed laser irradiation

The experiment of micro-blind-hole processing of sapphire by a femtosecond pulsed laser with a wavelength of 1030 nm, repetition frequency of 100 kHz and pulse width of 290 fs was carried out to study the effects of laser power, scanning speed, repeated scanning times and defocusing amount on the morphology of micro-blind holes. It can be seen from the experimental results that the depth of the micro-blind-hole

In this paper, we report on a successful development and application of diazoresin (DR)/β-Cyclodextrin covalently linked capillary coatings using the layer by layer (LBL) self-assembly technique combined with photochemistry reactions. The modified capillary remarkably suppressed the protein adsorption on the inner surface of silica capillary and successfully separated lysozyme (Lys), myoglobin (Mb)

With Miyi diatomite as the carrier and ferric nitrate as the modification agent, nano-micron vanadium adsorbent was prepared in the study. Then the adsorption properties of the prepared adsorbent were characterized by XRD, XRF, SEM, and ICP-OES analysis. The effects of adsorption time, initial pH value and initial vanadium concentration on VO3− adsorption performance were studied and the adsorption

In this article, we determine the impact of laser parameters on the development of a flexible conductive transparent film in multi wall carbon nanotubes (MWCNTs) regular structures fabricated on the PET substrate. Both MWCNT and PET are the attractive material for flexible electronics and technological interest in Micro/Nano-manufacturing. Now day, femtosecond laser irradiation nanojoining with selected

Silicon carbide (SiC) ceramics, due to their excellent mechanical properties and oxidation resistance at elevated temperature, have a widespread application in microelectronics and aerospace. However, the machining of SiC ceramics into the desired structural ceramic components presents a challenge because of their high hardness and high brittleness. In this paper, a novel method of underwater femtosecond

Nowadays, the integration of energy storage micro-devices has attracted more and more attention. The integration of planar on-chip micro-supercapacitors (MSCs) not only supplies a higher voltage output, but also meets the requirements of different devices for output voltage by adjusting the number of integrated MSCs. Here, we show an integrated all-solid-state planar on-chip MSC, which based on reduced

In this paper, the adsorption of copper ions on the prepared multilayer diazo resin-graphene oxide/polyacrylonitrile composite membranes was studied, and the adsorption capacity of GO modified polyacrylonitrile membranes to copper ions under different conditions was explored. The concentration of copper ion solution before and after adsorption was measured by inductively coupled plasma (ICP). The results

During the dynamic wireless charging of electric vehicles, the offset from the vehicle Rx coil will reduce the mutual inductance of the coupling mechanism, which results in a significant reduction on the transmission efficiency of the system. Now a real-time detection method of electric vehicle position based on double coils is proposed. By analyzing the change trend of the pickup voltage in the detection

In view of the non-linearity of the output of the PT100 sensor, this article describes the temperature characteristics of the PT100 with a third-order model. The mathematical model of pt100 and standard thermometer IRTD is analyzed. The transfer function of pt100 and IRTD is evaluated by step response experiment. A least squares method based on transfer function is proposed as a compensation algorithm

Ti-5553, with its high strength and toughness, has been widely used in the aerospace industry as a novel aerospace alloy. High hardness, strong chemical affinity, and low thermal conductivity are the main reasons for its classification as a difficult-to-cut material. Although significant work has been performed to analyze the machinability of Ti-5553, the oxidation behavior of Ti-5553 and tool materials

To solve problems in the cutting of Ti-5553, simulation and experimental studies were conducted with the cutting tool placed in low-temperature liquid nitrogen. A finite-element simulation of dry and liquid-nitrogen cryogenic cooling cutting processes was conducted, and an experiment on dry and liquid-nitrogen cryogenic cutting was implemented. The influence of the cutting parameters with a change

Interference noise affects the ranging capability of terahertz radar signal detection. Aiming at the above problem, a method based on adaptive empirical mode decomposition and stochastic resonance system is proposed. With the preprocessing method of twice sampling, adaptive empirical mode decomposition, stochastic resonance system, and scale recovery, the optimal intrinsic mode function can be screened

In order to solve decreasing of reactivity of nano aluminum powder due to the alumina shell on the surface, used polyethylene glycol (PEG) as a coating material to obtain in situ PEG on nano aluminum particles with electrical explosion wires method. Based on the minimum free energy principle and BKW equation, the combustion and explosion performance of the coated sample is estimated. SEM and TEM to

The nonlinear absorption and ultrafast dynamics process of WS2 and WS2-Ag nanocomposite were investigated by using nanosecond Z-scan measurements and femtosecond time-resolved transient absorption spectrum, respectively. Z-scan measurements showed that WS2 exhibit saturation absorption (SA) at low excitation intensities, with the increase of incident intensity, a switch from SA to reverse saturation

(2020). Guest Editorial. Ferroelectrics: Vol. 562, No. 1, pp. v-v.

(K0.48Na0.48Li0.04)(Nb0.8Ta0.2)O3 (KNN-LT) ceramics were prepared by the traditional solid-state reaction method. The combined effects of Li and Ta additions resulted in a decrease in the orthorhombic-tetragonal (TO-T) and Curie temperature (Tc). The piezoelectric and electromechanical properties were found to be d33 ∼ 165 pC/N, kt ∼ 0.438, kp ∼ 0.363 at the sintering temperature 1178 ˚C. It has a

The NiCe/Al2O3 catalysts with various nickel contents were prepared by impregnation method and applied for CO2 methanation. The catalysts were characterized by temperature-programmed reduction of H2 (H2-TPR) and X-ray diffraction (XRD) techniques, respectively. TPR results indicated that the increase of nickel loading weakened the interaction between NiO and Al2O3, and XRD results suggested that with

This paper presented an effective method that utilized scrap rubber as the precursor to prepare porous activated carbons by the pyrolysis and KOH activation processes. Adjusting the activation temperature can tailor the textural characteristics of the resulting activated carbon, thus tuning the energy storage performance of the activated carbon, including methane storage behavior and electrochemical

Magnetic composites have been widely used in the area of wastewater treatment, which own the properties of simple and quick adsorption and separation functions. This article presented a cost-effective and chemically modified adsorbent (Fe3O4@SiO2@Chitosan) based on a novel facile light-assisted technique for methyl orange (MO) removal. The characterization results of FT-IR, TEM, XRD and the hysteresis

Maillard reaction between chitosan and xylan was performed in common ionic liquid solvent at the first time. FT-IR, UV-visible spectrophotometry and fluorescence spectrometry were used to characterize the structures and the optical properties of the products. The results revealed that Maillard reaction happened when the mass ratios of chitosan to xylan were 1:1 and 1:3. In the FT-IR spectra, the new

In this article, we adopted the coprecipitation preparation SrSn(OH)6 precursor and then uses the two calcination was prepared neodymium-doped SrSnO3 of near-infrared light-emitting materials, the material under the 588 nm excitation wave excitation, at around 1060 nm and 1070 nm, conforms to the characteristics of near-infrared light, by X-ray diffraction, scanning electron microscope, and fluorescence

Recently, two-dimensional Transition metal dichalcogenides (TMDCs) have attracted widespread attention due to their unique electrical and optical properties. Specially, the monolayer WS2 has high photoluminescence intensity and short response time, and has high application potential in optoelectronic devices. Here, a method for synthesizing single-layer WS2 crystal by atmospheric pressure chemical

The investigation of the thermo-optic coupling process of AgGaSe2 crystal was carried out via pulsed CO2 laser during doubling frequency at wavelength of 9.6 µm. To further detecting the thermal anisotropic property of AgGaSe2, a thermo-optic coupling model of the nonlinear crystal under IR frequency was constructed, following the coupling process was simulated according to this model. The simulation

The TiO2/Fe3O4 composite is a new kind of photocatalytic materials with magnetism. Using FeCl2, FeCl3, and titanyl sulfate as the main raw material, TiO2/Fe3O4 was synthesized by sol-gel process and 450 °C calcination for 2 h under a condition of hydrogen nitrogen mixture gas. The samples were characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR) and scanning

In order to guarantee stability during luffing process of a folding-boom arm system, output of the system should be precisely controlled based on analysis of key factors affecting luffing stability. Luffing motion was simulated focusing on jittering of the working point at beginning and end moment. Simulation results indicate that luffing stability is mainly determined by the action synchronization

Nickel-doped methylated silica membrane materials (Ni/CH3-SiO2) were prepared with tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES) as silicon precursors, and Ni(NO3)2·6H2O as Ni source by sol-gel method. The effects of Ni content on the microstructures of Ni/CH3-SiO2 membrane materials were investigated by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR)

The preparation of human hair keratin/calcium alginate blend fibers were used of wet spinning process. With the increase of the protein content of human hair, the thermal properties of the blend fibers were almost no effect, but the whiteness and the softness were decreased. Furthermore, the surface of the fibers gradually became rough and the number of grooves increased obviously. The breaking strength

The rheological behavior of regenerated cellulose/thermoplastic polyurethane (TPU) blend spinning solutions was investigated by an advanced rotary rheometer. The viscosity decreases with increasing shear rates, exhibiting shear thinning behavior. The storage modulus of G′ and the loss modulus G″ both increase with increasing frequencies, while the complex viscosity decreases gradually. The non-Newtonian

In this research, keratin was extracted from the waste wool fiber using sodium sulfite as dissolving agent. The reaction results showed that the optimum conditions were as follows: the dosage of sodium sulfite 30 g/L, the sodium hydroxide 6 g/L, the sodium dodecyl sulfate (SDS) 10 g/L and in 90 °C for 3 h. Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and SDS-polyacrylamide

Pyrovatex CP which was used as a flame retardant was added into polyvinyl alcohol (PVA) and sodium alginate (SA) aqueous solution. PVA/SA composite fibers modified with Pyrovatex CP (PSC) were prepared by wet spinning. It was characterized by FT-IR, SEM and TG. The results showed that Pyrovatex CP reacted with hydroxyl groups of PVA and SA. The breaking strength of PSC was slightly improved and the

One of the most important factors restricting the application of carbon nanotubes (CNTs) is how to uniformly disperse CNTs in liquid phase. In this paper, the mechanism of non-covalent modification of carbon nanotubes has been studied by using the method of all-atom molecular dynamics simulation, and the corresponding experiments have been carried out to verify the obtained mechanism. The results show

High-performance liquid chromatography (HPLC) is one of the most widely used separations and analysis methods, which has become an indispensable part of the separation and detection of mixtures, qualitative and quantitative analysis and other scientific research and social production fields. Because of the decisive effect of the chromatographic column on analysis and separation, it has become the core

(2020). Guest Editorial. Ferroelectrics: Vol. 561, No. 1, pp. vii-vii.

At the isothermal annealing below the crystallization temperature, dependences of the internal friction on time for the thin-film nanogranular composite consisting of crystalline nickel (Ni) and an amorphous material based on lead zirconate titanate [Pb0.81Sr0.04(Na0.5Bi0.5)0.15][(Zr0.575Ti0.425)]O3 have been studied. We have observed a relaxation in the amorphous phase of the composite. The structural

The temperature dependences of the resistivity ρ(T) of ceramic La1−xSrxMn1−yFeyO3 samples at x = 0.5, and y = 0, 0.02 and 0.10 are investigated in the temperature range of 5-300 K in magnetic field B up to 1 T. It was found that dependences ρ(T) with x = 0.5; y = 0.02, and 0.10 obey the Shklovskii–Efros-like variable-range hopping conductivity law ρ(T)=ρ0(T) exp[(T0/T)1/2]. This behavior is governed

Method of digital piezomaterials fabrication based on mixed composites of the “piezoelectric ceramics-polymer” system is presented. The materials intend for use as precursors in the manufacture of piezoelectric elements using the technology of layer-by-layer bonding of powders. The method of investigation of these materials and frequency dependences of their electromechanical properties is described

The theory of the direct magnetoelectric effect in a bilayer ferromagnetic—piezoelectric structure is presented with the exact consideration for electric fields, inhomogeneous over the thickness of the piezoelectric layer. The solution of the motion equations for a piezoelectric and ferromagnetic medium made it possible to numerically-analytically calculate the dependence of the natural frequency of

The object of the study was samples of commercial piezoelectric ceramics Pb0.95Sr0.05(Zr0.53Ti0.47)O3+1% Nb2O5 (PZT-19). A series of experimental studies of the kinetics of changes in the optical transmittance of the PZT-19 ceramic samples was carried out during exposure to the full spectrum of a PESL-SF2 11 W/865 E14 fluorescent lamp. The kinetics of restoring the initial optical transmittance of

The features of the frequency dependence of conductivity and the current-voltage characteristics in magnetoelectric composite ceramics 0.85BiFeO3–0.15MgFe2O4 in the temperature range (300–500) K and frequencies (10–500) kHz are studied.

The purpose of this work is to study the effect of rapid thermal annealing (RTA) with halogen lamps on the structural and phase characteristics of lead zirconate-titanate (PZT) films. The PZT thin films with a thickness of 1.0 ± 0.1 μm were deposited by high-frequency reactive plasma sputtering in an oxygen atmosphere on oxidized silicon and silicon substrates with orientation (100). After deposition

Based on our experience of spectral dielectric measurements and our literary knowledge, we simulate a medium with the properties of liquid water. The medium under consideration is a dense gas of particles in the form of solid spheres of two types—possessing either a dipole moment of a water molecule (1.84 D) or an elementary charge (1.6 * 10−19 C). Particles are bonded via ion-dipole interaction; they

This work is devoted to computer simulations of a viscoelastic media heating by standing cylindrical ultrasonic waves generated inside a cylindrical piezoelectric transducer with radial polarization. The transducer is assumed to operate on wall-thickness vibrational mode. Acoustic simulations were performed with the aid of two software packages: k-wave (acoustic simulations) and FeniCS (thermal simulations)

In this paper, the study of relaxation processes in ferroelectric ceramics under the influence of a dc electric field has been performed. To measure the field and time dependences of the complex elastic, dielectric, and piezoelectric parameters of ferroelectric ceramics, the impedance spectroscopy method and piezoelectric resonance analysis program were used. A comparative analysis of various characterization