Materials Literature
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Regularities of the formation of plasma-electrolytic oxide coatings on aluminum and titanium from an aqueous Na 2 SiO 3 + NaOH electrolyte solution containing silicate-acrylate emulsion and dispersed polytetrafluoroethylene particles are studied. Coatings, the surface part of which is composed chiefly of polytetrafluo…
The zircaloy-4 is an alloy of zirconium, which has a very weak thermal neutron absorption, satisfactory mechanical properties and good corrosion resistance at high temperature. For these reasons, zircaloy-4 is used as a material of cladding fuel rod of nuclear reactors. In this environment, it is submitted to differen…
Electrochemical performance of Ni 1-x Co x- GDC (Gd 0.1 Ce 0.9 O 1.95 ) cermet was studied for the use as a novel anode for solid oxide fuel cells (SOFCs). Ni 1-x Co x O (x=0.25, 0.5, 0.75) was prepared from NiO and Co 3 O 4 compounds via a solid state calcination at 1000 °C for 10 h in air. A progressive increase in…
27Al and 7Li wide-line NMR spectroscopy incorporating a high pressure NMR apparatus has allowed the first in situ study of the solvent mediated, direct synthesis of an alanate, thus overcoming the dearth of analytical techniques available to study phenomena occurring in a pressurised slurry. In contrast to the decompo…
We have applied density functional theory to investigate different types of carbon nanotubes (armchair (4,4)CNT and zig-zag (7,0)CNT) as sensors of some pollutant gas molecules, especially CO, CO2, NO and NO2. We show, for the first time, that the adsorption of pollutant gas molecules on carbon nanotubes are improved…
Nanoparticles (NPs), grown in liquid media, stand out over other classes of inorganic nanomaterials due to the high degree of control with which their crystal structure, size, shape, and surface functionalities can be engineered in the synthesis stage and to the versatility with which they can be processed and impleme…
In this work we demonstrate simple techniques to form well crystallised CuAlO2 powders and thick films from CuO and boehmite or alumina, using a novel molten salt painting process. We examine the formation mechanism using X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and in situ…
The role of several additives in electrolytic solution during silicon anodization was reported in this paper. The morphologies of macroporous silicon arrays in low-doped n- or p-type silicon are strongly influenced by the chemical nature of these additives. Conventional solvents (ethanol and acetic acid), non-ionic (T…
Aiming at better understanding of the deformation mechanisms involved into plastic deformation of duplex stainless steels, acoustic emission (AE) measurements were performed during room temperature tensile deformation of model steels and alloys with different phase structure including single phase α Fe–30Cr and γ SUS3…
The size evolution of gold nanoparticles synthesized using tannic acid with initial gold chloride concentrations ranging from 0.2 - 2 mM at various tannic acid to chloroauric acid molar ratios (ranging from 2:1 to 12:1) has been analysed. Dynamic light scattering spectroscopic and tramission electron microscopic analy…
Different core moieties can modulate the self-assembly behaviors of second generation carbazole-based conjugated dendrimers with the same dendrons and surface groups in a solvent mixture of a good solvent and an anti-solvent. For TA-D2 with triphenylamine as the core, crystalline spherulites were formed since the more…
Techniques of the production of polymer nanocomposites based on tetrapyrrole compounds with photoelectric, nonlinear optical, and photorefractive properties are considered. Supramolecular ensembles of Ru(II) and Ga(III) complexes with tetra-15-crown-5-phthalocyanine are found to form upon the deposition of thin films…
Here we demonstrate a simple, nondestructive method for the preparation of stable aqueous colloidal solutions of graphene nanoribbons and carbon nanotubes. The method includes sonication of carbon nanomaterials in hypophosphorous acid, filtration accompanied by washing the solids with water and dispersion of the solid…
The thermal evolution of the phase composition of CeP 2 O 7 and Ce(PO 3 ) 4 with 10 mol% Y and Gd doping, respectively, was examined by in-situ powder X-ray diffraction and thermogravimetry with in-line mass spectroscopy. The phase composition depends critically on the P to metal ratio, the annealing temperature, humi…
Hydrogenated ZnO thin films have been successfully deposited on glass substrates via a nitrogen mediated crystallization (NMC) method utilizing RF sputtering. Here we aim to study the crystallinity and electrical properties of hydrogenated NMC-ZnO films in correlation with substrate temperature and H 2 flow rate. XRD…
In the present investigation, we report the effect of ytterbium (Yb) impurity band on charge transport and thermoelectric properties in PbTe1-xIx. The temperature dependent interaction of Yb-states with charge carriers and host energy-bands is found to significantly affect the electrical transport parameters in all th…
A series of new butterfly-shaped thieno[3,2-b]thiophene oligomers with phenyl and thiophene units were synthesized through Suzuki coupling and Stille coupling reactions. The optical and thermal properties of these materials can be tuned by varying both substituents and the conjugation length. The crystal structures ha…
A new and simple low-molecular-weight gelator containing squaric acid moiety (PhSQ) forms a hydrogel or crystal in aqueous solution depending on the PhSQ concentration. The hydrogelation ability of PhSQ can be enhanced by adding an acid reagent. The hydrogel might consist of bundles of PhSQ whose hydrophilic porous ca…
A series of narrowly dispersed nano- and microsized CPAs has been prepared from a (porphyrin)Mn(III) biscarboxylic acid and Co(OAc)2. The morphologies have been diversified from amorphous spheres to crystalline cubes by varying reaction periods. In addition, their heterogeneous catalytic olefin oxidations are successf…
Monodispersed nanocrystals (NCs) can form ordered and functional binary superlattices. A variety of functional binary nanocrystal superlattices (BNSLs) and bilayer assemblies based on lanthanide-doped NaREF4 (RE = Y, Gd) were constructed with different assembly methods. These assemblies are attractive for applications…