Materials Literature
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In the framework of valorization of the worn tires and environment preservation, several techniques exist in many fields. In Algeria, and since 2005, about 19 facilities are carried out using the so-called `Pneusol' technique. Currently, researches are interested in the use of rubber fine powder (RFP) that results fro…
Al-Cu alloy and its matrix composites reinforced with different volume fractions of short carbon fibers covered by copper have been produced by powder metallurgy method and heat treatment. The effects of the fiber volume fraction and load applied on the wear and friction behaviors of the composites were investigated.…
Two- and three-dimensional structures with submicron dimensions, such as photonic crystals, patterned magnetic media, micro- and nano-electromechanical systems (MEMs/NEMs), microfluidics chips, etc., are becoming ubiquitous in multiple applications across many research fields. The necessity to engineer these devices h…
Strong acids and bases has been widely applied in commercial gelatin industry, but the application of weak acids and bases has not been much done. Application of a solution of strong acids and bases could be expected to affect human health and uneconomical, therefore it requires further study on the possibility of the…
Industrial pollution issue and dark colour of carbon black, clay based non black filler are getting more importance for reinforcing elastomer. EPDM-Kaolin composites with various maleated EPDM concentration have been prepared by mixing on a two roll mill. The rheometry data showed the optimum cure time increases with…
Precise measurements of the piezoelectric signals are essential for tailoring the properties of ZnO nanowire (NW) based energy conversion devices. We characterize three-dimensional piezoelectric potential profiles of NW arrays using a kelvin probe force microscope (KPFM). A specific device composed of vertically align…
The results of our researches of the influence of exponentially distributed surface centers on the effective surface recombination rate and the parameters of silicon solar cells (SCs) are reported. In our calculations, we assumed the acceptor and donor surface states to lie in the upper and lower, respectively, parts…
Nanostructures CdS films were prepared by chemical bath deposition technique on glass substrates, where the cadmium nitrate salt was used as a source of cadmium ions and thiourea (SC(NH2)2) as a source of sulphide ions(S-2). The deposition were carried out at different pH values. Structure of these films was character…
Retinoblastoma is a malignant ocular tumor arising within the neural tissue lining the back of the eye during development. An excessive rise in reactive oxygen species (ROS) is associated with signaling cascades and mutagenic events during tumor initiation and angiogenesis in retinoblastoma. Cerium oxide nanoparticles…
The discovery of superconductivity in iron pnictides has generated a great deal of research interest, not only in basic physics, but also in the field of applied superconductivity. It has been confirmed that the pnictides have peculiar physical properties including an unconventional pairing mechanism. This brings an o…
In this study, oxidative stress in the bacterial culture of gram negative i.e., Escherichia coli (E. coli), and gram positive i.e., Staphyllococcous aureusS. aureusare studied using bare and glutathione (GSH, reduced) coated ZnO nanoparticles (NPs). ZnO-NPs were synthesized at pH 7.2 through non-aqueous sol-gel method…
Alternative deposition methods and materials are of interest for the fabrication of thin film solar cells since they offer potential enhancements for either low cost, high speed or high efficiency but also because they can help in better understanding the underlying physical and chemical processes that could lead to t…
Industrial testing and production of corrosion-resistant 08ΓЩΦ-Ysteel strip (strength class K50–K52) on the 2800 mill at OAO Ural’skaya Stal’ is described. Differences are noted in the degree of alloying and mechanical properties of strip produced by quenching and tempering and by thermomechanical rolling with acceler…
For current-matching of multi-junction Si solar cells, localized surface plasmons (LSPs) of metal nanoparticles (MNPs) are considered as a new solution because MNPs can reflect or transmit light of specific wavelengths. To predict the LSP effect of MNP films in solar cells, we fabricated gold and silver nanoparticle f…
In diesel engines, NOx formation is a highly temperature dependent phenomenon and takes place when the temperature in the combustion chamber exceeds 2000 K. Therefore in order to reduce NOx emissions in the exhaust, it is necessary to keep peak combustion temperatures under control. One simple way of reducing the NOx…
In this experimental study, high zinc brass was welded by friction stir welding (FSW). A threaded cylindrical tool was used for welding the brass plates in butt configuration. Mechanical tests i.e. hardness, tensile, bending, and erichsen tests were performed for evaluating the welding strength. In addition, optical m…
We present in this work the fabrication of high aspect ratio nanopores in 500 nm PECVD SiC films through AAO (anodic aluminum oxide) mask. The initial AAO thin film is 180 nm thick and the diameter of nanopores is 33 ± 7 nm. We have used three plasma chemistries: CF4, Cl2/Ar, and SF6/O2to study the pattern transfer pr…
A new complex of Np(V) with the chromate ion and an organic outer-sphere guanidinium cation is isolated from an aqueous solution. Its composition and structure are determined by X-ray diffraction analysis. The structure of [C(NH2)3]3[NpO2(CrO4)2](H2O) (I) is based on anionic chains [CpO2(CrO4)2][ 3t- between which gua…
Under severe fault conditions the core of a current transformer can saturate and the transformer output current is then no longer linearly related to the measured current. Digital relays may then fail to command breakers to open, thereby leading to dangerous or destructive overcurrents. In this paper, a compensation t…
This manuscript presents an original XPS study of mesoporous p-type silicon samples. The use of X-ray photoelectron spectroscopy helps in understanding the different chemical environments of silicon atoms generated during porous-silicon formation and their evolution in time. Thus, the oxidation state and the contamina…