Materials Literature
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We report the results of angular-dependent ac susceptibility experiments performed on two derivatives of ${\text{Mn}}_{12}$ single-molecular magnets: the well-known ${\text{Mn}}_{12}$ acetate, which contains disordered acetic acid molecules in interstitial sites of the crystal structure and ${\text{Mn}}_{12}$-tBuAc, f…
Manganese–cobalt oxide thin films are sputtered on graphite foils by radio-frequency sputtering with different volume flow rates of oxygen, sputtering pressure, and power. Next, the manganese–cobalt oxide thin films are annealed at various temperatures. A maximum specific capacitance of 256 F/g is obtained under the o…
The paper deals with some factors influencing microstructure and mechanical properties of austempered ductile iron (ADI). Final structure and properties of ADI are obtained by exactly controlled process of heat treatment of nodular cast iron. The influence of conditions of isothermal heat treatment on microstructure a…
Novel chiral amorphous molecular materials containing photoresponsive azobenzene moieties were designed and synthesized. These materials led to the formation of smooth and uniform thin films without grain boundaries. Photoirradiation of the thin film with linearly and elliptically polarized light caused trans-cis phot…
Tropical coastal wetland ecosystems are widely distributed in arid regions. The Grande coastal lagoon in Peru's central plain is shallow, eutrophic and alkaline, exposed to the annual hydrological regime with flooding and desiccation periods, when a salt crust is formed. The brackish to hypersaline habitats showed sal…
Single-atom tips can be used as ideal point sources of electron beams. Noble-metal covered W(111) single-atom tips can be reliably prepared and their lifetimes are long enough for real applications. These tips are both thermally and chemically stable and can be regenerated in vacuum when accidentally damaged or contam…
The diffusion of water in nanoporous organosilicate glass (NPOSG) film stacks causes significant adhesion degradation of the capping layer on top of the NPOSG. We have used this adhesion degradation to estimate the diffusivity of water in an NPOSG film stack. The effective diffusivity is , nearly 2 orders of magnitude…
The photoluminescence (PL) properties of europium-doped CaMgSiO 4 phosphors were systematically studied. Eu 3 + -doped CaMgSiO 4 exhibited an intense red emission from the D 5 0 to F 7 J manifold transitions of Eu 3 + , whereas the Eu 2 + -doped phosphors showed an extremely weak emission peaking at 475 nm due to the…
The inhibition efficiency of acetone extract of red onion skin on aluminium in hydrochloric acid solutions has been evaluated by weight loss techniques. Values of inhibition efficiency obtained are dependent upon the concentration of inhibitor and temperature. Generally, inhibition was found to increase with inhibitor…
We propose the quantitative mean-field theory of mechanical unfolding of a globule formed by long flexible homopolymer chain collapsed in poor solvent and subjected to extensional deformation. We demonstrate that depending on the degree of polymerization and solvent quality (quantified by the Flory−Huggins χ parameter…
Abrasive wear of high alloyed overlay materials with high contents of carbide phases of M7C3 depends on the sizes of the carbide particles and on their distribution in an overlay. This work is focused on the study of the carbide particles size effect on abrasive wear. The size of carbide particles of M7C3 type, their…
Self-assembly (SA) of amphiphilic block copolymers (poly(ethylene oxide)−poly(propylene oxide)−poly(ethylene oxide)) was investigated in dispersions of multi-walled carbon nanotubes (MWNT) as a function of temperature using spin probe electron paramagnetic resonance (EPR) spectroscopy. Nitroxide-labeled Pluronic with…
Nanoparticles of 35 individual metals as well as their binary combinations were synthesized using High Throughput pulsed laser ablation (PLA), and collected on Al(2)O(3), CeO(2), SiO(2), TiO(2), and ZrO(2) pellets. These materials were then screened for their catalytic activities and selectivities for the partial oxid…
We present a FORTRAN code based on a new powerful and efficient computational approach to solve the double exchange problem for high-nuclearity MV clusters containing arbitrary number of localized spins and itinerant electrons. We also report some examples in order to show the possibilities of the program.
We have studied the microstructures of the solvent-cast films of polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer with PMMA cylinder-forming composition. The casting solvents, 1,1,2-trichloroethane (TCE), toluene (Tol) and their binary mixtures, were controlled to evaporate at a certain rate R…
This study aims to investigate comparison of radiation attenuation property of harzburgite mineral calculated by Monte Carlo (MCNP) and Artificial Neural Network (ANN). Slab sample modeled in MCNP with 1, 2 and 4 cm thickness was irradiated with parallel beam of monoenergetic particles. Incoming and outgoing particle…
Increasing levels of CO2 and H+ proton in the rhizosphere from some legumes may play an important role in calcite dissolution of calcareous salt affected soils. Soils planted with white and brown varieties of cowpea (Vigna unguiculata L.) and hyacinth bean (Dolichos lablab L.) relying on either fertilizer N (KNO3) or…
An acidic cellulose–chitin hybrid gel electrolyte is prepared from cellulose, chitin, binary ionic liquids, and an aqueous solution for an electric double-layer capacitor (EDLC). The obtained acidic hybrid gel shows a high ionic conductivity of at a room temperature of , which is comparable to of an aqueous electrolyt…
In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed th…
We have investigated the effect of ambient gases on the structural, electrical, and optical characteristics of ITO thin films intended for use as anode contacts in OLED (organic light emitting diodes) devices. These ITO thin films are deposited by radio frequency (RF) magnetron sputtering under different ambient gases…