Materials Literature
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We reveal that the unique properties of ultrathin metasurface resonators can improve dramatically magnetic resonance imaging (MRI). We place a metasurface formed by an array of metallic wires inside a scanner under the studied object and achieve a substantial enhancement of the radiofrequency magnetic field by means o…
We propose the design of a magnet-free non-reciprocal leaky-wave antenna at terahertz (THz) frequencies based on a spatiotemporally modulated graphene monolayer. Spatiotemporal modulation is achieved through time-varying voltages applied over a set of gate electrodes beneath the graphene monolayer, providing ample fre…
In summary, we demonstrated WSe2FETs contacted with thin metallic WTe2, at channel lengths down to 90 nm and current saturation up to 60 μA/μm. A temperature-dependent study suggests the presence of an intrinsic vdWg at the 2D-2D contact. Thus, ultra-thin WTe2could be preferred to graphene as a contact depinning layer…
Two new 13, 14/14, 15-disecopregnane-type skeleton C21 steroidal aglycones, neocynapanogenin G (1) and neocynapanogenin H (2), were isolated from the hydrolyzed extract of the CHCl3 soluble extract of the roots of Cynanchun paniculatum. Their structures were determined on the basis of chemical evidence and extensive s…
The conductivity of NCF-reinforced laminates is improved by using electrically conductive knitting yarn. A test textile containing four different silver coated yarns has been produced to assess the effect on laminate conductivities. Depending on the yarn count and degree of silver coating the conductivity in thickness…
Polianilin (PANi) merupakan salah satu polimer konduktif yang memiliki sifat unggul dibandingkan polimer konduktif lainnya. Keunggulan tersebut diantaranya adalah stabilitas kimia dan fisikanya sangat baik, reaksi redoksnya bersifat reversibel, memiliki rentang konduktivitas yang lebar dan dapat disintesis dengan meto…
Nematic elastomers are new materials that have many remarkable properties. In this article, we study how nonlinear elasticity of semi-soft nematic elastomers can be described phenomenologically. We start with a theory based on strain tensor only, and then continue to develop a phenomenological description with the liq…
In this study, an environment-friendly synthetic strategy to process zinc oxide nanocrystals is reported. The biosynthesis method used in this study is simple and cost-effective, with reduced solvent waste via the use of fruit peel extract as a natural ligation agent. The formation of ZnO nanocrystals using a rambutan…
Spin–orbit torque provides an efficient way to switch magnets for low power memory applications by reducing the current density needed to switch the magnetization. Perpendicularly polarized magnets are preferred for high density data storage applications because of their high thermal stability in scaled dimensions. Ho…
In the course of water deionization on ion-exchange filters of mixed action, charged with a mixture of KU-2×8 ch.s. cation exchanger and AV-17×8 ch.s. anion exchanger, which are ion-exchange resins of nuclear class, the water being treated is contaminated with soluble organic substances originating from degradation of…
The boundary conditions of the formation of PbSe and concomitant impurity phases, Pb(OH) 2 and PbCN 2 , were determined by calculation of the ionic equilibria in the Pb 2+ –Na 3 C 5 Н 6 О 7 –CH 4 N 2 Se system. Complex kinetic studies of the PbSe deposition from an ammonia–citrate mixture containing ascorbic acid as a…
Due to the upcoming demands of next-generation electronic/magnetoelectronic devices with low-energy consumption, emerging correlated materials (such as superconductors, topological insulators and manganites) are one of the highly promising candidates for the applications. For the past decades, manganites have attracte…
Urea-Selective catalytic reduction(Urea-SCR) method is an effective way to reduce the NOxemissions for diesel engine, and the closed-loop state feedback control strategy is widely studied by many researchers. In order to estimate the un-measurement state, this paper uses extended Kalman filter(EKF) to design a state o…
In this paper, a new neural-network-based hysteresis model is presented. First of all, a variable-power hysteretic operator is proposed via the characteristics of the motion point trajectory of hysteresis for magnetostrictive actuators. Based on the variable-power hysteretic operator, a basic hysteresis model is obtai…
A dual-band thin printed-circuit-board (PCB) microwave absorber is proposed for applications in 2.4 and 5 GHz frequency bands. Each unit cell of the absorber utilized a simple combination of a square ring and a thick cross-dipole with some additional tuning elements. In the design process, numerical simulations were p…
Operation of long EHVAC cable interconnectors requires controlling voltage/reactive power profiles. With reference to a hypothetical 200 km long 400 kV-50 Hz cable system, connecting to the grid three large OWFs with 2 GW total capacity, the paper compares results yielded by a dedicated algorithm with those of a stand…
Graphene is a wonderful material with outstanding properties which is ideal for micro-electro-mechanical systems (MEMS) and also nano-electro-mechanical systems (NEMS) like sensors and switches including strain gauges, mass and force sensors. Graphene is single atom thick layer of graphite which consists of carbon ato…
Effect of high pressure hydrogen annealing on polysilicon thin film transistors has been evaluated using a novel acquisition setup and analysis of deep trap states. Trap density was extracted with high resolution of density and energy level. Trap density was reduced by one order of magnitude after annealing. Passivati…
Pulsed X-ray Induced Partial Discharge (PXIPD) is a technique to test the quality of insulation materials by making use of the generation of start electrons through X-ray irradiation of the material. These start electrons accelerate the time needed for the generation of partial discharges within voids. An important qu…
This paper presents an investigation of the dielectric properties of two environmental friendly cooling fluids, hydrofluoroethers and fluorinated ketone. The AC and DC dielectric response of both cooling fluids have been measured at different temperatures. The experimental results indicate that temperature is positive…