Materials Literature
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The crystallographic and magnetic properties of the quaternary Heusler alloys Ru 2 Mn 1− x V x Ge were investigated. Although the end members, Ru 2 MnGe ( x = 0) and Ru 2 VGe ( x = 1), are antiferromagnetic and paramagnetic, ferromagnetism with Curie temperature over 200 K appeared at about x = 0.3. The saturation mag…
The scientific and economic context of our study is related to the pollution of the soils, fresh and marine water by a persistent organochlorine pesticide (chlordecone) in a tropical context (French West Indies). The former application of chlordecone results today in a diffuse pollution in agricultural soils, which ar…
Purpose: Hot deformation behaviour of two-phase titanium alloys is determined depending on microstructure developed in heat treatment and plastic deformation processes. In the paper stereological parameters of microstructure obtained in initial heat treatment and plastic working in the α+β↔β phase transformation range…
The formation of B defect, the crystal structure, formation energies, density of states and electronic structure of B-N codoped ZnO were studied using first-principles pseudo-potential approach of the plane wave based upon the density functional theory（DFT）.The study reveals that most of the B atom will present in as-…
Electrospinning is a process used to produce fibers on the micrometer to nanometer scale from charged polymer solution. The electrostatic forces and the evaporation of the solvent as it travels from the ejector to the ground collector stretch the fiber continuously (1). An in-house electrospinning device was built by…
In this work the corrosion behavior of Ti-6Al-4V alloy was studied by using galvanostatic measurements at room temperature in different media which includ sodium chloride (food salt), sodium tartrate (presence in jellies, margarine, and sausage casings,etc.), sodium oxalate (presence in fruits, vegetables,etc.), aceti…
We show that for graphene with any finite asymmetry in the on-site energy between the two sublattices (Δ), the optical absorption edge is determined by the Δ. The universal conductance will be broken and the conductance near the band edge varies with frequency as 1/ω2. The onset conductance is σc = 2σ0 = πe2/2h, indep…
Within the framework of the modified proton ordering model for the KH2PO4 type with taking into account a linear in strain 6 contribution to the proton subsystem energy but without tunneling, in the four-particle cluster approximation we calculate the thermodynamic potentials of the system. Using the appropriate equat…
The structures of Reactor Pressure Vessel Internals are subjected to an intense neutron flux. Under these operating conditions, the microstructure and the mechanical properties of the austenitic stainless steel components change. In addition, these components are subjected to stress of either manufacturing origin or g…
The functionalized photonic crystals of porous silicon biosensor was prepared for the application as a label-free biosensor based on distributed Bragg reflector interferometer. Prepared distributed Bragg reflector of porous silicon biosensor displayed sharp reflection in the optical reflective spectra. The mean of con…
A mortar was prepared by MPC(magnesia-phosphate cement) and immersed in saturated NaCl solution and seawater for 196 d to investigate its chloride ion permeability.The chloride ion concentration from specimen surface to different depths was determined,and permeation depth and distribution rule of chloride ion in MPC m…
The group of diatoms morphologically similar to Achnanthidium pyrenaicum (Hustedt) Kobayasi includes a number of ecologically important taxa. The restricted distribution patterns of some Achnanthidium Kutzing species have become more obvious after detailed studies of this relatively small group. It has been characteri…
Nanocrystalline NiFe 2 O 4 (Nickel Ferrite) particles were synthesized using the coprecipitation technique and subsequently their nonlinear optical properties were studied using the open aperture Z-Scan experiment employing nanosecond and femtosecond laser pulses. A significant optical limiting is observed in both cas…
The final goal of this study is to develop multi-functional organic/inorganic hybrid nanoparticles, which can be utilized as biomedical imaging probes and drug delivery carriers. As an initial step toward this goal, we encapsulated CdSe/ZnS quantum dots (QDs) into poly(ethylene glycol)-b-poly(D,L-lactide) (PEG-PLA) mi…
Structural variations of SiOx matrix have been studied with Fourier Transform Infrared Spectroscopy (FTIR) during the formation of Si and Ge nanocrystal. Two frequently used methods, magnetron sputtering and ion implantation have been employed to form SiOx matrix containing excess Si and Ge. The Si-O-Si stretching mod…
ZnO nanorods are fabricated on glass substrate by spin-coating sol-gel process using non-basic aged solution and annealing. Sample solutions reserved in room temperature for different time (one day, one month, two months and four months) are prepared for the experiment. The morphology study indicates that the aging ti…
Abstract About 150 samples from core representing nearly a complete section of the Niobrara Formation in the Berthoud State No. 3 well, Berthoud Field, Larimer County, Colorado, were analyzed for insoluble residues, carbonate content, and bulk-rock and clay mineralogies. The Smoky Hill Chalk Member contains mostly imp…
A discontinuous foaming process has been employed to investigate the effects of two types of fillers - calcite (CaCO 3 ) and dolomite (CaMg(CO 3 ) 2 ) on the morphological and mechanical properties of flexible polyurethane foam. The particle sizes of the fillers: 6 nm, 3.5µm, and 0.84 mm vary from composition ranges o…
The studies aimed at an analysis of the formation and growth kinetics of zinc coating on reactive silicon-killed steels in a zinc bath. The growth kinetics of the produced zinc coatings was evaluated basing on the power-law growth equation. As regards galvanizing of the surface of products, investigation was done for…
Heterometallic N-bridged complex PcFeNMnPc (Pc – tetra-tert-butylphthalocyanine) was synthesized by interaction of PcMnV≡N with PcFeII. As evidenced from UV-vis, IR and EPR data, this complex can be easily oxidized by dioxygen with formation of a stable green cation-radical with one unpaired electron. In protic solven…