Materials Literature
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Abstract The inorganic–organic crosslinking polythiourethane/ZnS (PTU/ZnS) nanocomposites with high refractive index and transmittance were successfully prepared. The thiol‐capped ZnS nanoparticles with a diameter of about 5 nm were fabricated into the molecular chains of PTU via the formed covalent bonds between the…
The temperature dependence of the strain, electric field, and polarization of lead zirconate titanate ceramic under unipolar electric fields up to 1.3 kV mm−1 from −50 °C up to +200 °C is reported. An electrostrictive model is shown to describe the response to high levels of induced polarization and electric field bel…
The photoluminescence (PL) properties of properly annealed n -octadecylsiloxanes, which are newly recognized highly emissive hybrid materials reported recently by us (Nishimura, A.; Sagawa, N.; Uchino, T. J. Phys. Chem. C 2009, 113, 4260), with different cross-linking structures are investigated using steady-state and…
The stress response during Pb underpotential deposition on (111)-textured Au has been examined on a cantilever beam electrode in perchloric acid supporting electrolyte. We observe a sweep rate dependence for both the individual voltammetric waves and the stress response that we attribute to kinetically controlled surf…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAlternating Copolymerization of Bicyclic Bis(γ-butyrolactone) and Epoxide through Zwitterion Process by PhosphinesSousuke Ohsawa, Kazuhide Morino, Atsushi Sudo, and Takeshi Endo*View Author Information Molecular Engineering Institut…
Ab initio study reveals that strain can influence graphene’s ballistic conductance substantially; however, the effect of biaxial strain is significantly different from that of hydrostatic strain. For hydrostatic strain, tension increases conductance while compression decreases conductance. In contrast, when biaxial co…
Phase transitions in GeTe/SnSe and Ge2Se3/SnTe are investigated using time resolved x-ray diffraction. GeTe exhibits a structural transition from rhombohedral to the cubic phase at 300 °C, which is ∼100 °C lower than that of pure GeTe. This is facilitated by incorporation of Sn from SnSe. Sn migration is observed expl…
1,10-Phenanthroline mono-N-oxide (phenO) is a product of the decomposition of tris(1,10-phenanthroline)iron(III), Fe(phen)(3)(3+), and has a slight autocatalytic effect on the overall reaction. The mechanism is proposed to involve Fe(phen)(3)(4+) as a minor intermediate. The addition of phenO significantly influences…
We observed the Shubnikov–de Haas and the Aharonov Bohm oscillations in a graphene nanoring structure of 1 μm in diameter and with a 125 nm channel width. We found a separation of 2ΔVg=17.5 V between electron and hole Landau levels in the plot of longitudinal resistance as a function of gate voltage and magnetic field…
Abstract Chain extension of poly(ethylene terephthalate) (PET) with bisphenol‐A dicyanate (BADCy) was studied using an internal mixer under reactive blending conditions. The reaction between PET and BADCy was confirmed by Fourier transform infrared (FTIR) and chemical titration. With increasing amount of BADCy introdu…
Spin-glasslike (SGL) behavior and exchange bias (EB) effect have been reported in multiferroic Bi1/3Sr2/3FeO3 ceramics. Temperature dependence of magnetization and high field relaxation properties reveal the existence of SGL phases. After field cooling the sample from 350 to 10 K, exchange bias field (HEB), vertical m…
A broadband antireflective coating for silicon was fabricated by tailoring the compositions of SiNx and SiOxNy during conventional plasma enhanced chemical vapor deposition. The coating’s refractive index was quasicontinuously graded, e.g., from 3.22 to 1.44 at 1550 nm. Over the 280–3300 nm wavelength range, the refle…
Polymer composite materials consisting of poly(ethylene terephthalate) (PET)-poly(trimethylene terephthalate) (PTT) blends and microcrystalline cellulose (MCC) were prepared by injection molding.The composites were analyzed for tensile, flexural, and impact strength as well as density determinations.There was no stati…
X-ray absorption near edge structure and x-ray diffraction studies with synchrotron radiation have been used to relate the electrical properties of ZnO:Al films to their bonding structure and phase composition. It is found that Al-sites in an insulating metastable homologous (ZnO)3Al2O3 phase are favored above a certa…
While the thermal conductivity of the filled skutterudites has been of great interest it had not been calculated within a microscopic theory. Here a central force, Guggenheim-McGlashen, model with parameters largely extracted from first-principles calculations and from spectroscopic data, specific to ${\text{LaFe}}_{4…
We report a temperature-dependent high-resolution x-ray diffraction investigation of 200-nm epitaxial ${\text{BiFeO}}_{3}$ thin films grown on (001) ${\text{SrTiO}}_{3}$. We find that ${\text{BiFeO}}_{3}$ undergoes two high-temperature transitions: a first-order $\ensuremath{\alpha}\text{\ensuremath{-}}\ensuremath{\be…
The formation process of sp3 hybridized carbon networks (i.e., diamondlike structures) in hydrogenated diamondlike carbon (DLC) films has been studied with the use of molecular-dynamics simulations. The processes simulated in this study are injections of hydrocarbon (CH3 and CH) beams into amorphous carbon (a-C) subst…
Building on mode-coupling-theory calculations, we report a novel scenario for multiple glass transitions in a purely repulsive spherical potential: the square shoulder. The liquid-glass transition lines exhibit both melting by cooling and melting by compression as well as associated diffusion anomalies, similar to the…
Pure ZnO hexagonal microwires and Fe(III)-doped ZnO microwires (MWs) with a novel rectangular cross section were synthesized in a confined chamber by a convenient one-step thermal evaporation method. An oriented attachment mechanism is consistent with a vapor-solid growth process. Photoluminescence (PL) and Raman spec…
Malaysia, especially the Borneo Island state of Sarawak, has a large variety of tropical wood species. In this study, selected raw tropical wood species namely Artocarpus Elasticus, Artocarpus Rigidus, Xylopia spp., Koompassia Malaccensis, and Eugenia spp. were chemically treated with sodium metaperiodate to convert t…