Materials Literature
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The phase-change memory (PCM) technology represents one of the most attractive concepts for next generation data storage. PCM operation is based on the particular properties of a chalcogenide alloy, the ternary compound Ge2Sb2Te5, which is able to perform fast and reversible transitions between a crystalline, high-con…
Upon X-ray irradiation of hypoxic aqueous solution, modified oligodeoxynucleotides (ODNs) bearing a pair of disulfides at both ends of the strand that forms a stem-and-loop structure with a neighboring arrangement of α,ω-bis-disulfides underwent efficient cyclization via an intramolecular exchange reaction at the disu…
This study demonstrated the preparation of a Cr-doped ZnO wurtzite structure without any impurity phases (metallic Zn, Cr, , , etc.) via electrodeposition. The surface morphology, lattice structure, Cr content, chemical binding characteristics, and optical properties of the deposits were examined by field-emission-sca…
Multisegmented one‐dimensional nanostructures composed of gold, copper, and nickel have been fabricated by depositing metals electrochemically in the pores of anodic aluminum oxide (AAO) templates. The electrodeposition process has been carried out using a direct current in a two‐electrode electrochemical cell, where…
A simple and rapid process for deposition of high refractive index films of CdS/PVP nanocomposite is described. CdS/PVP films are prepared on glass substrate by dip coating a precursor film from methanolic solution of thio‐organic complex of cadmium and PVP and subsequent heating at 180° C in air for 10 min. The trans…
Abstract Eighteen binary mixtures of 4-pentyloxy-4′-cyanobiphenyl (5OCB) and 4, 4′-di(alkoxy)azoxybenzenes (nOAB) with n = 5, 6, and 7 at different concentrations have been studied in detail. Over a wide concentration range, induced SmA phase was observed in all the mixtures except in one. In most of the mixtures, the…
The surfaces of biodegradable peptide nanospheres with density-controllable poly(ethylene glycol) (PEG) brush layers were amenable to high levels of control, from hydrophilic 'stealth' properties to hydrophobic adsorptive properties depending on the PEG density in response to environmental conditions -'intelligent' pr…
Poly(L-lactide) (PLLA) films were modified with poly(ethylene imine) (PEI) either by adsorption or covalent binding to prepare the material for immobilization of polyelectrolyte multilayers (PEM). Two different PEI, low- and high-molecular-weight (LMW or HMW, respectively) PEI, were used. The PEI modification efficien…
In this study, and films with quinary metallic elements were developed as diffusion barrier materials for Cu interconnects. To improve the interface adhesion to Cu, an AlCrTaTiZr buffer layer was deposited on the barriers to form and bilayer structures. The as-deposited AlCrTaTiZr and films were amorphous structures,…
The polyurethane rigid foam/expanded perlite thermal insulation composites (PPC) have been prepared by mixing the two-component polyurethane and expanded perlite. The effects of proportioning of constituents on the mechanical and thermal properties of PPC were investigated. The results showed the compressive strength…
A method is proposed to improve the photocurrent to dark current contrast ratio for the ZnO nanowire/Au Schottky barrier diode fabricated using dielectrophoresis to align the nanowires. Because the leakage current would lead to a large background noise, a poly(methyl methacrylate) (PMMA) layer is first employed as the…
Laser microcutting of thin sheets made of innovative and hard to machine materials, such as shape memory alloys (SMAs), is a very interesting topic. Innovative laser sources, such as pulsed fiber lasers, are becoming promising tools to be used in precise and fast operations in industrial applications. The positive fea…
The simultaneous control of size, morphology, and size distribution of particles is a challenging topic for powder synthesis, and one-dimensional (1-D) nanostructures have attracted increasing attention due to their specific properties. In the present study, 1-D CeO2 was synthesized via a solvothermal treatment using…
Self-assembled nanohybrids of a 1,10-phenanthroline derivative and Au nanoparticles exhibit different optoelectronic properties, as a consequence of the different arrangements of the nanoparticles on the surface of the different-sized phenanthroline scaffolds.
A novel route to facilitate the degradation of phenol is reported. This new approach is based on a micellar polyoxometalate (POM) catalytic system. The micellar POM catalyst could promote phenol molecules' degradation into a simple inorganic compound such as CO2 using only air as an oxidant under room conditions. The…
In this study, the influences of polarity and the amount of oxidized polypropylene wax (OPPW) in blends with polypropylene (PP) were investigated by studying their surface properties. OPPW was completely miscible with PP up to 10 wt%. The adhesive strength of a acrylic-based primer coating on PP sheets, containing dif…
A method for calculating and constructing isobaric-isothermal sections of ternary system phase diagrams with the use of convex hulls was developed. The method is based on the projection of the singularities of the lower part of the Gibbs energy convex hull onto the plane of component mole fractions followed by a geome…
CdS nanocrystals with sizes between 3 and 4 nm were synthesized via a competitive reaction chemistry method, where the thio‐glycerol is used to restrict the crystal growth as a capping agent. The structural and morphological characterization of the samples have been done using X‐ray diffraction (XRD) and Transmission…
Macroporous p-type gallium phosphide(100) (p-GaP(100)) films have been prepared through anodic etching in HBr(aq) in a two-electrode cell. The morphology of this macroporous film differed from the macropore morphology typically observed for porous n-type III–V semiconductors. The activity of these macroporous p-GaP(10…
To quantitatively determine germanium, arsenic, sulfur, and selenium contents in As1 − x S x , Ge1 − x S x , As1 − x Se x , and Ge1 − x Se x glassy alloys by X-ray fluorescence analysis, a technique using standards was developed. This technique allows quantitative determination of the composition of these glasses with…