This paper discusses the results of a study focused on nature interaction Me-MeN-(Me,Mo,Al)N coatings (where Me = zirconium (Zr), titanium (Ti), or chromium (Cr)) with contact medium based Ni-Cr system. The studies were carried out during turning nickel–chromium alloy at different cutting speeds. hardness was found, and their nanostructure phase composition studied. experiments conducted using ...

Pure monoclinic single crystalline Ag2Te nanorods were synthesized by a two-step method. The first step concerns the electrodeposition of self-standing Te in an ionic liquid medium, taking advantage its templating properties. These obtained are with growth direction along [001] axis hexagonal lattice. average diameter as-deposited is 60 ± 13 nm less than 300 long. Afterwards, resulting nanostru...

      In the present work, the effect of Ca(NO3)2.4H2O and (NH4)2HPO4 primary solutions as the beginning materials in synthesis of a calcium phosphate phase, was examined. So, we investigated the wet chemical reactions in solution at different temperatures by a hydrothermal condition aimed at hydroxyapatite (Ca10(PO<su...

L’autosuffisance en riz poursuivie par l’État du Sénégal depuis l’Indépendance a motivé des investissements colossaux dans le Delta fleuve Sénégal, au nord pays. Cet article évalue la contribution Projet de promotion partenariat rizicole (3PRD) aux dynamiques organisationnelles et techniques. L’importance ce projet repose sur public-privé, un paradigme récent monde développement l’agriculture i...

Abstract Perovskite nanoparticles La 1-x ? x Fe 1-y y O 3 , ( = 0.0, 0.01 and 0.02) were prepared using the citrate combustion method. The samples crystallized in a single phase orthorhombic structure. energy dispersive spectroscopy (EDS) confirms that chemical composition is very close to nominal one. particle size values indicated nano scale. selected area electron diffraction (SAED) pattern ...

Perovskite quantum dots (PQDs) have fascinating optoelectronic properties, such as high photoluminescence yield (PLQY) for a broad range of materials, and the possibility to obtain different bandgaps with same material or halide combinations. Nevertheless, blue-emissive materials generally present limited PLQY color instability. Here, two molecular organogels, based on derivative an amino acid ...

Magnetite/gold core-shell nanoparticles (magnetite/gold NPs) have important optical and magnetic properties that provide potential for applications, especially biomedical ones. However, their preparation is not exempt from difficulties might lead to unexpected or undesired structures. This work reports the synthesis characterization of magnetite/gold NPs using tetramethylammonium hydroxide (TMA...

Nanocomposites filled with impermeable two-dimensional materials are of specific interest for protecting metal from corrosion. The addition hexagonal boron nitride nanosheet (BNNS) into a coating matrix can improve the barrier effect virtually due to its high chemical and thermal stability dielectric property. This atom-level thick filler involves «tortured pathway» that prolongs penetration di...

Hydride formation was studied on Pd particles supported on SiO2, and the results were evaluated with reference to a corresponding ZnO-promoted Pd/SiO2 catalyst reported recently. Pd particles (mean size, ~5 nm) were epitaxially grown on NaCl(001) cleavage faces and subsequently covered by a layer of amorphous SiO2, thereby maintaining their epitaxial orientation. The films were subjected to var...