Materials Literature
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Purpose: Verification of up-to-now use of conventional powders, provided to spray by the APS method for layers type TBC and its possible adaptation to layers of new types, which are based on new ceramic compounds, sprayed on conventional high temperature creep resisting alloys. New types of used ceramic powders are so…
We studied a coplanar zinc oxide (ZnO) thin-film transistor (TFT) using boron ion doped source/drain contacts. The ZnO was sputtered using an Ar and mixture at a substrate temperature of . The boron ion doped ZnO layer, having a sheet resistance of , was used as the source/drain contacts of the TFT. The coplanar ZnO T…
Although transparent conductive oxides (TCOs) have been known and used for quite some time, research on these materials is still very active to improve their characteristics. This paper is aimed at giving an overview of the contribution of the TCO materials to the economy in various fields of applications (flat panel…
We present in this letter the study of a multibeam antenna for telecommunication networks by using cylindrical electromagnetic band-gap (EBG) structures. The EBG structure behaves as a partially reflecting surface (PRS) and enhances the directivity of a simple radiating source. We begin by presenting the principle of…
The kinetics of the hydrogen oxidation reaction (HOR) were measured at high surface-area platinum/Vulcan carbon (Pt/VC) films before and after exposure to aqueous solutions of either sodium sulfide or mercaptopropionic acid (MPA, ) using rotating disk electrode (RDE) voltammetry. At 45–90% blocking of surface Pt atoms…
In this work, the effect of laser welding on the microstructure was studied for three Advanced High Strength Steels: transformation induced plasticity steel (TRIP), dual phase steel (DP) and martensitic steel. Two sheets of the same steel were laser welded and a microstructural study was performed by optical microscop…
Porous GaAs has been fabricated using pulsed current electrochemical etching. Scanning electron microscopy (SEM) shows that the time off , time on , and cycle time can promote thicker and more uniform layers compared to those of direct current etching. Choosing suitable pulse parameters produces layers with a thicknes…
The engine performance and pollutant emissions of a commercial SI engine using butanol-gasoline blended fuel are investigated in details. First dyno-experiment tests are carried out. By comparing with the pure gasoline fuel, it is found that the influence of butanol-gasoline blend on engine performance is small for lo…
Electrophoretic fluorescence images have been fabricated by deposition of nanoporous polyaniline-fluorescein conducting particles onto a micro-patterned polyaniline film.
FeCo thin films were prepared on MgO(100), MgO(110), and MgO(111) single-crystal substrates by UHV-MBE. The effects of substrate orientation and substrate temperature on the film growth structure and the magnetic properties were investigated. FeCo thin films with (100)bcc, (211)bcc, and (110)bcc planes parallel to the…
We investigate the stable lateral orientation of the single-walled carbon nanotube (SW-CNT) physically adsorbed onto the graphite substrate surface using molecular mechanics simulation. The system of the (3,3) armchair-type SW-CNT comprised of 198 carbon atoms with a length of 40.3 Å interacting with the rigid graphen…
Abstract In this work, the temperature dependence of heat capacity $C_{\text{p,m}}^{o}$ = f(T) of crystalline bis(η6-t-butylphenyl)chromium fulleride between T = 6 and 360 K was measured for the first time by precision adiabatic vacuum calorimetry. Also, for the first time, the temperature dependence of EPR signal par…
AIM: To determine if disruption of the cagA gene of Helicobacter pylori (H pylori) has an effect on the expression of other proteins at proteome level. METHODS: Construction of a cagA knock out mutant Hp27_Delta cagA (cagA(-)) via homologous recombination with the wild-type strain Hp27 (cagA(+)) as a recipient was per…
The combination of a [1111] metacyclophane blocked in 1,3-alternate conformation and bearing four pyrazolyl coordinating units with MX(2) (M = Co, Zn and X = Cl or Br) leads to the formation of crystals formed by packing of 2D coordination networks. In the case of CuBr(2), the formation of a 1D network was observed. S…
This paper will review selected aspects of the processingstructureproperty relationships in ultrafine grained (ufg- grain sizes 100 to 500 nm) and nanocrystalline (nc- grain sizes < 100 nm) materials. Of the various processing methods to obtain fine grain size materials, the two that have provided bulk artifactfree sa…
Optical properties of silicon nanocrystals (Si-ncs) prepared by silicon implantation into silicon oxide have been investigated by photoluminescence measurements and spectroscopic ellipsometry. The dielectric function associated with Si-nc uniformly and nonuniformly depth distributed has been determined by means of the…
The continuous dimensional reduction drives the development of metrology, analysis and characterization for nano and micro electronics. An enormous worldwide R&D effort focuses on the understanding and controlling materials properties and dimensions at atomic level. Crucial for groundbreaking new developments is the a…
Cadmium telluride is a commercially viable material for thin-film photovoltaic cells and is amenable to low cost electrochemical deposition. The majority-carrier type can be controlled by deposition conditions. We have produced back-contact thin-film solar cells by a self-aligned electrochemical deposition process ont…
A novel method to measure the absolute phase shift on reflection of thin film is presented utilizing a white-light interferometer in spectral domain. By applying Fourier transformation to the recorded spectral interference signal, we retrieve the spectral phase function , which is induced by three parts: the path leng…
There has been a lot of interest in the Si based strained technology lately, especially the modification of band structures which provides a theoretical basis for the design of the high-speed and high-performance devices and circuits. The band structure models of strained Si1-xGex on （001）,（101）,（111） relaxed Si are s…