Materials Literature
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A simple and powerful anodization method is described for the formation of highly ordered coaxial bimodal nanotubes (see image) on titanium alloys. Coaxial nanotube arrays may possess considerable advantages over existing coaxial nanocables.
Transmission electron microscopy images showed that the ZnO quantum dots (QDs) were conjugated with multi-walled carbon nanotubes (MWCNTs). Bistable memories utilizing an ensemble of the ZnO QD-MWCNT heterostructures were developed and the storage capability of the devices was significantly enhanced due to the conjuga…
Abstract A melt pump was assembled into the compounding line to ensure both sufficient time for diffusion process of polymer chains into the silicate gallery and sufficient mechanical shear energy for exfoliation of clay layers. The melt pump in front of the open co‐rotating twin‐screw extruder controls the throughput…
Abstract A stable porous superhydrophobic high‐density polyethylene (HDPE) surface with water contact angle of 160.0 ± 1.9° and sliding angle of 2.0 ± 1.6° was obtained by adding ethanol in humid atmosphere at 5°C. Soaked in water with temperatures ranging from 5 to 50°C for 15 days, even suffering compressive forces,…
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…