Materials Literature
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In this paper, an analytical model is developed for potential along the channel of low band gap graphene nanoribbon field effect transistor (GNR-FET) at high temperature. For the derivation of equation of potential, non-locality approximation of poisson's equation has been used. The spatial variation of potential alon…
The crosslinked and porous copolymer grains were synthesized by inverse suspension polymerization of acrylamide. The synthesized copolymer was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). It was achieved to absorbed 418 g water by 1 g copolymer after 5 min wai…
Quantum dot (QD) solar cells have the potential to utilize the high energy photon to multiple electron-hole pairs in order to increase the maximum attainable thermodynamic conversion efficiency. It has a tunable band edge, which offers the possibility to harvest light energy over the appropriate range of light to harn…
Ga-doped zinc oxide (GZO) thin films had been deposited by DC magnetron sputtering method at high argon (Ar) gas pressure and 250°C temperature on glass substrates. The Ar sputtering pressure was varied between 12.1 and 12.9 Pa. The results indicated the GZO thin films had a hexagonal wurtzite structure and highly C-a…
In the paper we present theoretical and experimental results of two variants of contactless thermal analyzer (CTA) for determination of specific heat capacity, thermal diffusivity and thermal conductivity for different sample sizes. Measuring system under investigation is fully automatic (including of sample illuminat…
Results of the first self-consistent calculation of electronic structure of endohedral fullerenes within the Hartree-Fock approximation are presented. The case study is Ar@C60. A phenomenon of the significant hybridization of the valent shell of the confined atom due to the presence of the fullerene core is observed.…
Profiles of trenches in silicon were calculated by fitting measured polarized reflectance spectra with theoretically calculated RCWA (rigorous coupled wave analysis) models. The agreement of trench geometry from optical measurements with SEM cross-sections was good. The contact-free optical measurement on productive w…
Nitrogen doped Zn0.925Mg0.075O (ZMO) films were grown on Si substrate by pulsed laser deposition (PLD). The influence of nitrogen on the optical properties and the structure of ZMO films have been studied by photoluminescence (PL), Raman spectra and X-ray diffraction (XRD). The results indicate that the emission spect…
Understanding the influence of electrospun scaffold architecture (fiber diameter, pore size, and fiber orientation) on morphology, adhesion, proliferation, differentiation and organization of different kinds of cells and mechanical behavior leads to engineering the functional tissue for reconstruction by controlling t…
Quantum-chemistry modeling of carbon nanotubes (8,0) and (5,5) has revealed certain properties of the topochemical Stone–Wales defect. The rolling-up of a planar graphene sheet into a small-diameter nanotube leads to an approximately 0.6 eV decrease in defect formation energy. The SW-defect localized states are resona…
Scaling method has been used widely in railgun technology. But nonlinear problem is seldom studied because of the complexity and uncertainty. In order to employ the scaling method better, the paper brings the nonlinear drag model to the solid armature railgun circuit. Several drag functions were compared including dra…
The transmission electron microscope (TEM) is well known as the technique of choice for visualization and measurement of features at near-atomic length scales, particularly for semiconductor devices. For example, a critical measurement of interest may be the thickness of the gate oxide in a transistor. The accuracy of…
Direct application of model extraction methods to tabulated admittance data often gives a model which can suffer in accuracy when applied with high-impedance terminations. The problem is relevant in situations where the admittance matrix has a large eigenvalue ratio since the small eigenvalues are likely to become cor…
In this paper we report on a novel method to fabricate graphene transistors directly on oxidized silicon wafers without the need to transfer graphene. By means of catalytic chemical vapor deposition (CCVD) the in-situ grown bilayer graphene transistors (BiLGFETs) are realized directly on oxidized silicon substrate. Th…
Various materials for shielding against electromagnetic radiation have been rapidly developed to protect the operational environment and prevent interference. Reliable measurement is required to determine and evaluate the material properties. In this paper, the characterization methods for planar material sample fixtu…
Optical properties of PLD-deposited barium strontium titanate thin-films consisting of three stoichiometries have been investigated. Dielectric layers containing BaxSr1-xTiO3(x = 30, 40, 50) have been deposited on glass substrates using pulsed laser deposition techniques using oxygen partial pressures of 1.3 Pa ± 0.13…
In this work we consider the enhancement of ultimate performance of semiconductor infrared detectors utilizing nanoplasmonics. To this purpose we analyze the application of transparent conductive oxides (TCO) as plasmonic material with the plasma frequency in the near infrared. We investigate the possibility to apply…
Synchrotron radiation X-ray diffraction has been applied for the precision study of the micro-structure evolution of a Zr-1% Nb alloy deformed by uniaxial tension. A nonmonotonic pattern of the integral width of X-ray lines as a function of in situ deformation and acting stress has been revealed, which is in agreement…
A study of the effect of Sn (1, 2, 3.5, 4.5, and 5 wt%) and Bi (0.5, 1.5, 3, and 4%) on the corrosion behavior of Al in ethylene glycol (C2H6O2)-40% water mixtures at 20, 40, and 60°C has been carried out using electrochemical techniques. Techniques include potentiodynamic polarization curves, electrochemical impedanc…
The author presents a general formula derived from the earlier developed boundary integral equation theory, which is important for absorption calculations of multi-boundary gratings in conical diffraction. Examples of absorption computations of a photonic crystal supporting polariton-plasmon excitation and an x-ray-gr…