Materials Literature
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CdTe@CdS quantum dots, cationic polyelectrolyte poly-diallyldimethylammonium chloride, and anionic polyelectrolyte polyacrylic acid were assembled on the surface of silica nanoparticles based on the electrostatic layer-by-layer self-assembly to prepare fluorescent composite nanoparticles. Transmission electron microsc…
A analise de estruturas em elevadas temperaturas comecou a ser desenvolvida a pouco tempo no Brasil. As normas brasileiras e a literatura apenas analisam a resistencia mecânica e a fluencia de elementos estruturais de aco em temperaturas elevadas, ficando para este caso uma lacuna para o comportamento do aco em situac…
In this article, the boundary singularity for stationary solutions of the linearized Boltzmann equation with cut-off inverse power potential is analyzed. In particular, for cut-off hard-potential cases, we establish the asymptotic approximation for the gradient of the moments. Our analysis indicates the logarithmic si…
In this paper, ferromagnetic Co 50 Fe 50 nanorings were fabricated by template-assisted sputtering deposition. The obtained Co 50 Fe 50 nanorings have a good dimensional uniformity, with outer diameter of 360 nm, width of 50 nm and thickness of 40 nm. The magnetic properties of Co 50 Fe 50 nanorings were investigated…
En el presente trabajo se busco disenar el nucleo de un reactor empelando combustibles con compuestos de UMo monolitico. Para ello se partio del nucleo del reactor OPAL, que usa combustibles de siliciuros de uranio. A la vez se empleo este reactor como referencia para los requerimientos impuestos. Se estudio el desarr…
In this work we study the self-diffusion properties of a liquid of hollow spherical particles (shells)bearing a smaller solid sphere in their interior (yolks). We model this system using purely repulsive hard-body interactions between all (shell and yolk) particles, but assume the presence of a background ideal solven…
Statistical copolymers of acrylonitrile (AN) and methyl acrylate (MA) were successfully prepared and characterized using reversible addition-fragmentation chain transfer (RAFT) copolymerization. A typical copolymer was charged with 15 wt. % MA content. This thesis describes a systematic variation of the RAFT copolymer…
This study deals with the behaviour of a stainless steel (passive material) undergoing tribocorrosion. Focus has been put on the synergistic effect existing between mechanical action and medium electrochemistry, leading to significant wear. In a first step, a methodology has been set up, on a ferritic microstructure,…
A simple and non-toxic way was employed to fabricate electrical conductive TiO2 materials based on a chemical reduction process here. Glucose was selected as a reductant to reduce AgNO3 to obtain Ag-modified TiO2 nanoparticles. The properties of the nanoparticles were characterized by XRD, TEM, and fourpoint probe res…
Bridges play a crucial role in connecting two places. Therefore, it is an important subject for concerned agencies to maintain a bridge's functionality and safety after its completion. As we know, steel bridges possess the advantages of light weight, high strength, and high ductility. However, the corrosion problems c…
To evaluate the self-healing capability of asphalt mixtures, this paper puts forward a fuzzy evaluation method for self-healing of asphalt mixtures on the basis of a comprehensive study on the influence factors of self-healing capability. First, the authors selected 18 judgment indicators and established a numerical m…
In heat assisted magnetic recording (HAMR) where near-field light from a head heats up a disk, disk overcoat needs to be heat-resistive and transparent. ta-C (tetrahedral amorphous carbon) films have been considered to be promising for HAMR disk overcoat, because they are denser and harder than diamond-like carbon (DL…
In the past, high resolution thermal sensors required expensive cooling techniques making the early thermal imagers expensive to operate and cumbersome to transport, limiting them mainly to military applications. However, the introduction of uncooled microbolometers has overcome many of earlier problems and now shows…
A dye-sensitized TiO2 thin film photoanode and carbon-based counter elctrode were fabricated on the FTO substrate with doctor-blade method. And we have coated the ZnO nanoparticles successfully on the TiO2 photoanode through a simple dipping treatment. The photoelectric performance of the assembled cells was investiga…
In current hard disk drives, the spacing between the slider and the disk is reduced to the order of 1–2 nm. At such a narrow spacing, intermolecular forces at the head-disk interface play an important role in achieving a stable slider-disk interface. Even in the absence of actual head-disk contact, lubricant transfer…
Uncooled infrared (IR) microbolometer cameras are gaining popularity in a variety of military and commercial applications due to their simplicity, compactness and reduced cost when compared to photon detectors. Three commercially available IR microbolometer cameras have been investigated for use in a system. The camer…
Currents flowing through semicrystalline polyethylene terephthalate (PET) film were measured over the temperature range 60°–100°C in electric fields from 24 × 106 to 72 × 106 V/m. A study of the influence of these external stresses on the electrical behavior of PET, at glass transition phase, permitted interpreting it…
The adsorption capability of Cd2+ with δ-MnO2 was studied in water. The results indicated: the adsorption strongly relied on pH values. At 303K, the pH values were above 6.05, adsorption percentages of Cd2+ were nearly 100%. When pH values were below 2.3, adsorption rates of Cd2+ was below 20%. The adsorption processe…
In this paper, by means of three kinds of methods we study the transmission properties of the light through the quasiperiodic multilayers vertically following the generalized third-order Fibonacci (GTOF) sequences. By means of the decomposition–substitution (DS) method we predict that the GTOF systems possess an inter…
In order to investigate the possible effect of the scrap inclusions in recycling, microstructure and deformability of Zr-Nb based alloys cast with the addition of iron and iron oxide were studied. No visible iron oxide inclusions were observed in the arc-melted cake, suggesting that Zr and Fe2O3 reacted completely to…