Materials Literature
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The surface morphology and structure of the cubic stoichiometric spinel LiMn2O4powder prepared by microwave heating were examined using X-ray diffraction, scanning electron microscopy and transmittance electron microcopy. It is shown that the surface morphology of LiMn2O4particle changed with increasing preparing temp…
The phosphors Ca3(BO3)2: Ce3+, Ca3(BO3)2: Tb3+ and Ca3(BO3)2: Ce3+, Tb3+ were synthesized by the solid-state reaction method at high temperature. The phase purity was characterized by the powder x-ray diffraction (XRD). The luminescence properties were investigated by ultraviolet (UV)-Vis spectra. For the phosphor Ca3…
The transition phase and electronic properties of LiBH4 were investigated by ab initio plane-wave pseudopotential density functional theory method. According to the theoretical calculation, the phase sequence Pnma → P21/c → Cc is obtained. The phase transitions Pnma → P21/c and P21/c → Cc are at the pressure of 1.64 G…
A series of CexZr(1-x)O2 mixed oxides with different ratio (0 x 1) have been synthesized using microemulsion method. The structure and morphology of the mixed oxides have been investigated via X-ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). The results showed that the synthesized mixed…
Abstract not provided.
By using the Villain transformation, the Heisenberg ferrimagnetic spin chain is calculated. Two branches of the low-lying excitation in both the absence and presence of magnetic field are obtained. The thermodynamic quantities (such as free energy, magnetization, specific heat and static magnetic susceptibility) are a…
We investigate the crystallization process of NiFe2O4nanoparticles prepared by microwave heating technique, which were then characterized using X-ray diffraction, high-resolution transmission electron microscopy, the differential scanning calorimetry, Raman scattering, Fourier transformed infrared spectra (FTIR), and…
We study the superconducting pairing in an effective one-orbital model for alkaline iron-selenide superconductors. In both itinerant and local-moment pictures, we find that the nearest-neighbor hopping t 1 plays a crucial role. The pairing symmetry changes from s-wave to d-wave as t 1 is enhanced. For a reasonable t 1…
3D NAND Flash is the most promising memory architecture which can increase capacity continuously without aggressive scaling-down. The performance variability of the memory cell induced by the grain boundaries (GBs) of the poly-Si channel is a major concern. In this work, a full 3D simulation is performed to study the…
We discuss the optical properties of Si nanostructures for use as high-performance optoelectronic materials.
In this paper, 3D integration using multiple stacking of 2D active device layers is proposed as a new path of future 3D integration technology that can reduce the active power consumption by more than 50%. Two layers of Graphene FETs on PET substrates were successfully stacked using low temperature processes (<;150 C)…
The push for transistors with low standby power, marked by a sub-threshold swing (SS) less than 60mV/dec, has led to the investigation of exotic materials and novel mechanisms for FETs. Atomi-cally thin MoS2has unique features which make it good candidate for future integrated circuits: having small body thickness and…
Titanium doxide (TiO2) thin films were deposited on quartz substrates by spray pyrolysis method using titanium tetrachloride as precursor solution. Thin films were deposited at temperature substrate 350 ◦C and annealed at 550 ◦C in air for 120 min. Polycrystalline thin films with anatas crystal structure, as evidenced…
For this paper, films have been grown under various deposition conditions in order to understand the effect of processing on the film properties and to specify the optimum condition, namely substrate at temperatures of 400°C, oxygen pressure (2×10-1) mbar, laser fluence 400 mJ, and with different Mg doping (x=0, 0.02,…
The critical instability problem of graphene FET (GFET) has been resolved by systematically integrating multiple processes targeting to eliminate the sources of instability. As a result, hysteresis free GFETs with highest performance reported so far (>6,000cm2/Vs) has been successfully demonstrated and its stability o…
N-channel InGaZnO (IGZO) inverters with a resistor-load were fabricated with film-profile engineering (FPE). In this scheme the profiles of the deposition films contained in the device are tailored to adjust its operation characteristics. The fabricated drive thin-film transistors (TFTs) show steep subthreshold swing…
Nanosensors based on graphene nanoribbon, studied in the present work, could provide a special interest in (aero) space applications. More specifically, the paper proposes the construction of a nanosensor based on Mn (Manganese) impurities. Different spin configurations of the Mn atoms are considered. The mathematical…
The paper presents the application of waste materials resulted in the furniture manufacturing process as components for wood-plastic composites. The composites are produced from industrial byproducts, such as shavings and ABS (acrylonitrile butadiene styrene), without coupling agent. The two components are derived fro…
this is an attempt to develop an innovative technique in order to recover the paints of any vehicle which has been damaged during accidents or any incident. A special preparation of paints with nanoparticles will be used for varnishing of vehicles. This will help in spreading the paint due to force on the paint which…
In this study, three-point bending test is conducted at various deformation rate by using a thin plate of Fe-based alloy. The rate sensitivity of its bending deformation during loading and shape memory effect by heating after unloading are investigated experimentally. The results obtained are summarized as bellows. (1…