Materials Literature
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DNA toroids formed by calf thymus DNA and trivalent cation bis(ethylenediamine)gold(III) are investigated using transmission electron microscopy and dynamic light scattering. Stable dispersions containing toroids with diameters of around 44 nm and thicknesses between 12 and 17 nm are readily prepared. These toroids ar…
Anelastic anomalies (sharp variations in modulus and damping with temperature) were observed in tetragonal BaTiO3 via broadband viscoelastic spectroscopy after aging at 50 °C for 15 h. The effect was most pronounced under electrical short circuit condition, at low frequency and under small excitation strain (10−6). So…
Fluorinated single-walled carbon nanotubes (F-SWNTs) form important intermediates in SWNT sidewall functionalization, leading to a variety of materials and biological applications. By simulating the infrared (IR) signals for the 1,2- and 1,4-addition structures, in which fluorine atoms are arranged in ortho or para po…
Abstract Many publications have examined the biodegradable polymer poly(propylene fumate) (PPF) for use in tissue engineering applications. We have examined a similar crosslinkable polymer system, poly(propylene fumerate)‐ co ‐(propylene maleate) (PPFcPM), derived from maleic anhydride (MA) and 1,2‐propylene diol (PD)…
In this letter, we fabricated Co2FeAl films with perpendicular-to-plane magnetic anisotropy by cosputtering with terbium (Tb). The as-prepared (Tb+Co2FeAl) films (TCFA) consists of nanocrystalline L21 Co2FeAl and amorphous alloy of Tb(Co, Fe, and Al). The coercivity field (Hc) of the TCFA films is adjustable from 200…
A combined molybdate–phytic acid passivation treatment on galvanised steel is studied in this paper. Both copper decoration drop tests and immersion mass loss tests indicated that the combined molybdate–phytic acid passivated samples showed better corrosion resistance than that of samples treated separately by molybda…
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…