Materials Literature
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In this work we present the results of theoretical analysis of the de Haas-van Alphen oscillations in quasi-two-dimensional conductors. We have been studying the effect of the Fermi-liquid correlations of charge carriers on the above oscillations. It was shown that at reasonably low temperatures and weak electron scat…
Electrospinning is widely accepted as a simple and versatile technique for producing nanofibers. The present work, however, introduces a new concept of the electrospinning method for controlling the crystal morphology and molecular orientation of the nanofibers through an illustration of a case study of polyoxymethyle…
Ligand-mediated targeting of drugs especially in anticancer drug delivery is an effective approach. Dendrimers, due to unique surface topologies, can be a choice in this context. In the present study, PAMAM (polyamidoamine) dendrimers up to fourth generation were synthesized and characterized through infrared (IR), nu…
Mesoporous carbon with homogeneous boron dopant was prepared by co-impregnation and carbonization of sucrose and boric acid confined in mesopores of SBA-15 silica template. Low-level boron doping shows catalytic effect on oxygen chemisorption at edge planes and alters electronic structure of space charge layer of dope…
Abstract The quiescent and flow‐induced crystallization of a poly(ether‐ block ‐amide) is studied by means of rheo‐optical methods. Both optical microscopy and small angle light scattering have been used. The multiblock copolymer has a microphase‐separated structure with an order–disorder transition at 180–185°C, as m…
Oxyfluorination was evaluated on a series of wood-fiber reinforced thermoplastic composite (WPCs) formulations as a means to improve the adhesion of a water-based acrylic coating. The oxyfluorination increased the acrylic coating peel load to WPCs by 179%, yielding adhesion levels higher than those obtained on control…
Cr 2 O 3 thin films deposited on Si (100) and glass substrates by pulsed laser deposition using Cr 3 C 2 target were investigated. The films were deposited at base pressure (4 × 10 −5 mbar) and at different gas atmospheres, such as argon and methane. X-ray diffraction and X-ray photoelectron spectroscopy studies of th…
We report photoluminescence (PL) and Raman-scattering (RS) spectra in close-packed CdSe/Au mixed nanoparticle (NP) monolayers as a function of the ratio of CdSe to Au NPs in the film. The RS intensity showed slight enhancement with an increase in the Au NPs, while the PL intensity decreased dramatically. These results…
A series of liquid-crystalline materials based on 4-substituted cyanobiphenyls, RC(6)H(4)C(6)H(4)CN (R = C(5)H(11), C(6)H(13), C(7)H(15), C(8)H(17) and C(12)H(25), commonly referred to as 5CB, 6CB, 7CB, 8CB and 12CB, respectively) were functionalised to give the corresponding dithiadiazolyl organic radicals RC(6)H(4)C…
The linear elasticity of graft copolymer melts in the lamellar phase was examined by the self-consistent field theory solved in real space. The extensional and shear moduli, which are used to derive the Young's modulus, are found to be dependent on the architecture parameters of graft copolymers (the number of branche…
The mononuclear complexes [ReCl4(bpym)] (1) and [ReBr4(bpym)] (2) (bpym = 2,2′-bipyrimidine) are weak ferromagnets. Magnetic ordering occurs below 7.0 (1) and 20.0 K (2) and good hysteresis loops are observed for the two compounds at 2.0 K. A spin-canting phenomenon, i.e., a non-strict linearity of the individual spin…
This paper reports the crystallization and preliminary neutron diffraction measurements of HIV-1 protease, a potential target for anti-HIV therapy, complexed with an inhibitor (KNI-272). The aim of this neutron diffraction study is to obtain structural information about the H atoms and to determine the protonation sta…
Periodic stripe patterns which form when an electric field is applied to a thin nematic liquid crystal layer with a very low conductivity are discussed. In this case the dielectric electroconvection mode persists down to very low frequencies of the driving voltage. A Lifschitz point, i.e., a transition from normal to…
Controlling the three-dimensional structure of rod–coil block copolymer thin films is critical for the optimization of the carrier transport properties and exciton dissociation or carrier recombination efficiencies at interfaces in optoelectronic polymers. Using a model rod–coil block copolymer based on poly(alkoxyphe…
Abstract This article presents the processing/structure/property relationships for artificial wood made from stretched PP/wood‐fiber (WF) composites that have required strength and density. The die drawing of PP/WF composites causes a unidirectional orientation of the polymer molecules and enhances the mechanical prop…
Mesostructured calcium phosphates constructed by ionic frameworks were synthesized using carboxylic acid- and amine-type surfactants in mixed solvent systems of ethanol and water. A lamellar mesostructured calcium phosphate was prepared using palmitic acid as an anionic surfactant, as in the case using n-alkylamines.…
Angle-resolved x-ray photoelectron spectroscopy of the $\text{C}\text{ }1s$ line of highly oriented pyrolytic graphite reveals two components separated by $194\ifmmode\pm\else\textpm\fi{}6\text{ }\text{meV}$, with markedly different asymmetry parameters and natural linewidth. Analysis of the intensity of these peaks a…
Atomic force anodisation lithography has been used to create patterned silicon oxide nanostructures on a p-type silicon (100) substrate. Modification of these oxide nanostructures either by acid treatment or self assembly of 3-aminopropyltriethoxysilane yields a chemically heterogeneous surface containing hydrophilic…
A composite double zinc phosphate conversion coating was obtained via forming a hopeite crystal layer on an amorphous phosphate layer on the AZ91D magnesium alloy. The surface morphology, structure and phase composition of the composite coating were investigated by scanning electron microscopy (SEM) and X-ray diffract…
Abstract Melt grafting of the multimonomer system of maleic anhydride (MAH)/styrene (St) onto ethylene‐octene copolymer (POE) was performed by a twin‐screw extruder. The effects of St and initiator contents as well as MAH/St on the grafting reaction were investigated. The structure and properties of the grafted POE we…