Materials Literature
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Emission from charge recombination between radical cations and anions of a series of regioisomeric 1,4-, 1,3-, and 1,2-bis(phenylethynyl)benzenes (bPEBs) substituted by various electron donor and/or acceptor groups was measured during pulse radiolysis in benzene (Bz). The formation of bPEB in the excited singlet state…
Abstract In this article, epoxy/graphite nanoplatelet (GNP) conductive composites with the low percolation threshold of ∼ 0.5 vol % were prepared. The effect of microstructure, particularly the spatial distribution of fillers in the matrix on the resistivity and its dependence on temperature, also was investigated. It…
Abstract To investigate the effect of interfacial interaction on the crystallization and mechanical properties of polypropylene (PP)/nano‐CaCO 3 composites, three kinds of compatibilizers [PP grafted with maleic anhydride (PP‐ g ‐MA), ethylene–octene copolymer grafted with MA (POE‐ g ‐MA), and ethylene–vinyl acetate c…
The effect of varying bismuth concentration on the optical constants of amorphous Ge20Se80− x Bi x (where x = 0, 3, 6, 9 and 12 at%) thin films prepared by thermal evaporation has been investigated. The transmission spectra T(λ) of the films at normal incidence were obtained in the spectral region from 400 to 2500 nm.…
We report dynamic Monte Carlo simulations of crystallization under hard confinement of spherical diblock copolymers. We compared the parallel results of blocks with short chains made by breaking block junctions. We observed that blocks crystallize faster but harvest lower crystallinity than short chains, which is in a…
Relaxometric studies are still of scientific interest due to their use in medicine and biology. In this study, proton T(1) and T(2) relaxivities of Mn(II), Cu(II) and Cr(III) in water were determined in the presence and absence of various proteins (albumin, alpha-globulin, gamma-globulin, lysozyme, fibrinogen). The 1/…
Li adsorption on isoreticular MOFs with metal Fe, Cu, Co, Ni and Zn was studied using density function theory. Li functionalization shows a considerable structural change associated with a volume change in isoreticular MOF-5 except for the Zn metal center. Hydrogen binding energies on Li functionalized MOFs are seen t…
A thermo-responsive polymer/quantum dot platform based on poly(N-isopropyl acrylamide) (PNIPAM) brushes 'grafted from' a gold substrate and quantum dots (QDs) covalently attached to the PNIPAM layer is presented. The PNIPAM brushes are grafted from the gold surface using an iniferter-initiated controlled radical polym…
Effective delivery is a critical issue in the use of conventional free drugs. Studies on the structure-function relationship of a therapeutic antibody-derived candidacidal decapeptide (killer peptide, KP) revealed its ability to spontaneously and reversibly self-assemble in an organized network of fibril-like structur…
Single crystals of LnKNaNbO 5 (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb) were grown out of a reactive high temperature hydroxide melt. The structures were solved by single crystal X-ray diffraction. All compounds of the series LnKNaNbO 5 crystallize in the space group P 4/ nmm . The niobium is located in a rare square pyramida…
Abstract In this work, the feasibility of using lignin as a compatibilizer for composites made from jute fiber fabric and polypropylene (PP) was studied. Since lignin contains polar (hydroxyl) groups and nonpolar hydrocarbon, it was expected to be able to improve the compatibility between the two components of the com…
Using small-angle neutron scattering, we studied the variation of the polymer radius of gyration (${R}_{g}$) as a function of polymer concentration ($\ensuremath{\phi}$) for solutions of a flexible-chain poly(methyl methacrylate) in chloroform. We observed for the first time a distinct crossover between swollen coils…
Abstract Liquid polycarbosilanes substituted by unsaturated groups were prepared by a one‐pot synthesis with Cl 2 Si(CH 3 )CH 2 Cl, Cl 3 SiCH 2 Cl, and CH 2 CHCH 2 Cl (or HCCMgBr) as the starting materials. The as‐received polycarbosilanes were characterized by gel permeation chromatography, Fourier transform infrar…
The decompressive stress relaxation and decompressive resistance relaxation of skin-sensing silicone rubber/carbon black nanocomposite are investigated. The experimental results show that the instantaneous increment of the resistance increases with the increase of the instantaneous decrement of the pressure at the mom…
An environmentally friendly and efficient hydrothermal method has been used for the synthesis of mesoporous NbSBA-15 materials. To find better hydrothermal stability, the synthesized NbSBA-15 materials have been treated in boiling water and water steam at different temperatures with various times. The NbSBA-15 materia…
Nitrogen solubility at GaAs and InAs (001) surfaces has been studied employing density-functional theory calculations. The effect of the surface reconstruction and the reconstruction-induced surface strain on $\mathrm{N}$ solubility was analyzed in detail, considering the various surface layers and sites. The stabilit…
Abstract BACKGROUND: Ethylene–(vinyl alcohol) (EVOH) copolymer/organo‐modified montmorillonite (OMMT) composites were investigated. Composites with two different percentages by weight of OMMT were prepared using a melt‐extrusion procedure in a twin‐screw extruder, using EVOH as matrix. Films made of EVOH and EVOH/OMMT…
A new layout of complementary logic circuits based on p-channel carbon nanotube and n-channel zinc oxide nanowire transistors is presented, providing a hybrid approach to combine advantageous characteristic functions for the modulation of the current and operating voltage in transistors through proton radiation-genera…
Abstract Novel, randomly coupled, soluble, segmented polyimide–polydimethylsiloxane (PI–PDMS) copolymers were prepared from aminoalkyl‐terminated polydimethylsiloxane (At–PDMS), 4,4′‐oxydianiline diamine, pyromellitic dianhydride, and 4,4′‐diphenylmethane diisocyanate (MDI). When At–PDMS was introduced into the polyim…
Abstract The objective of this study was to manufacture and investigate a novel microfibrillar‐reinforced material based on fibrillized blends of polyethyleneterephthalate (PET), polypropylene (PP), and TiO 2 nanoparticles (300 nm and 15 nm in size). The uncompatibilized and compatibilized blends (polypropylene grafte…