Materials Literature
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Abstract Nanostructured polypyrrole films doped with para ‐toluene sulfonic acid were prepared by an electrochemical process, and a comparative study of the effects of swift heavy ions and γ‐ray irradiation on the structural and optical properties of the polypyrrole was carried out. Oxygen‐ion (energy = 100 MeV, charg…
Using the first-principles calculations, the change in magnetism and electronic structures during Cu nucleation in bcc Fe system was investigated. For modeling the Fe-rich bcc FeCu alloy, FexCu1−x (x≥0.75) were employed in the supercell system. Nonmagnetic Cu atoms were precipitated on the (100) plane of bcc Fe crysta…
A number of gaseous oxyacid salts have been identified by Knudsen effusion mass spectrometry by vaporizing Ga(2)O(3) from molybdenum and tungsten cells. The stability of gaseous molecules Ga(2)MoO(4), Ga(2)WO(4), Ga(2)Mo(2)O(7), and Ga(2)W(2)O(7) was deduced from the measurements. The structures and molecular paramete…
Abstract Electron beam crosslinking of elastomers is a special type of crosslinking technique that has gained importance over conventional chemical crosslinking method, because the former process is fast, pollution free, and simple. The technique involves the impingement of high‐energy electrons generated from electro…
Medium range order in amorphous thin films of Ge2Se3, a phase change memory material, was examined using electron nanodiffraction fluctuation electron microscopy. Variance measurements showed that medium range order existed at 0.36 and 0.58 Å−1. The film was not at equilibrium and contained a few monoclinic nanocrysta…
Double- and triple-walled TiO2/iron oxide nanotubes with well defined interfaces have been produced in nanoporous alumina templates using atomic layer deposition method. The structural properties of each individual layer are found to be dependent on the deposition temperatures. The outer layers of TiO2 are polycrystal…
A study of the D(2h) to C(2h) pseudo-Jahn-Teller distortion in the edge-sharing bioctahedral complex Mo(2)(DXylF)(2)(O(2)CCH(3))(2)(mu(2)-O)(2) is presented. We have performed extensive density functional theory (DFT) and complete active space self-consistent field (CASSCF) calculations. For both the full target compl…
A macroscopic toy model provides a method to visualize directly the complex behavior of real polymers.
Diatoms are single-celled organisms with rigid parts in relative motion at the micro-and nanometer length scales.Some diatom species form colonies comprising many cells.In this manuscript, the results of a two-dimensional finite element computer model are presented.This model was established to discover if diatom colo…
Abstract A new catalytic system based on Pd supported on polyether‐functionalized mesoporous silica was prepared. This material was obtained by co‐hydrolysis and polycondensation of tetraethylorthosilicate and a bis‐silylated triblock copolymer P123 ( M w = 5800) followed by the decomposition of Pd(OAc) 2 salt. We hav…
Needle image plates (NIPs) based on CsBr:Eu are a good alternative to the BaFBr:Eu powder image plates due to their higher sensitivity and improved spatial resolution. The x-ray radiation stability of the NIPs produced by Agfa Gevaert was investigated and it was found that the radiation stability of the optimized NIPs…
Determining a reliable lattice energy is vital in the attachment energy approach for crystal habit prediction. In this paper, we present an experimental validation of the energies calculated with the software GENMOL by an indirect determination of the enthalpy of sublimation using the Knudsen effusion method.
Due to their complexity, the basic plastic properties of all quasicrystalline materials are essentially unknown [M. Feuerbacher, C. Thomas, K. Urban, Plastic behaviour of quasicrystalline materials, in Quasicrystals: Structure and Physical Properties, H.R. Trebin, ed., Wiley/VCH, Berlin, 2003]. Plastic deformation of…
In the present paper, we extensively study the optical diffraction in two- and three-dimensional vector holograms and demonstrate the reconstruction of polarized optical images recorded in azobenzene-containing amorphous polymers (AP) and polymer-dissolved liquid-crystalline composites (PDLCC). The polarization states…
Large numbers of diatom taxa are currently being described each year and molecular data sets are providing phylogenetic evidence that challenges the traditional systematic ar-rangement of diatoms, but is such information being integrated into the classification? The traditional diatom classification originated as an a…
We have studied the effect of annealing (at temperatures 300, 400, and 500 °C) on nanoparticulate CdS film on silicon substrate deposited by hybrid Langmuir–Blodgett chemical bath deposition technique. Width, intensity, and the line shape of the longitudinal optical phonon in Raman spectra and photoluminescence (PL) s…
Polyhedral oligomeric silsesquioxane (POSS)-based amine ligands are used as capping agents in the reductive growth of Pd nanocrystallites, and the effects of the specific form of the ligand on the structure of both the secondary aggregate and the primary metal nanoparticle are explored. Secondary aggregates of the lig…
Present study concentrates on the effect of silane coupling agent on the properties and dispersibility of multi-walled carbon nanotube (MWCNTs) in the Polycarbonate (PC)/Liquid Crystalline Polymer (LCP) system. Thermal stability of the PC/LCP/MWCNTs has been improved in an appreciable manner with the addition of silan…
The defect creation at low energy events was studied using density functional theory molecular dynamics simulations in silicon carbide nanotubes, and the displacement threshold energies determined exhibit a dependence on sizes, which decrease with decreasing diameter of the nanotubes. The Stone–Wales (SW) defect, whic…
Abstract A series of titanium dioxide/silicon dioxide based poly(ethylene terephthalate) (PET) polycondensation catalysts were synthesized with different Si/Ti molar ratios and various amounts of polyvinylpyrrolidone (PVP). The composition, structure, and catalytic activities of the catalysts and the properties of the…