Materials Literature
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We have measured the critical phase change conditions induced by electrical pulses in Ge2Sb2Te5 nanopillar phase change memory devices by constructing a comprehensive resistance map as a function of pulse parameters (width, amplitude, and trailing edge). Our measurements reveal that the heating scheme and the details…
The thermodynamic functions of Gibbs energy, enthalpy, and entropy for the solution processes of triclosan (TS) were calculated from solubility values obtained at the temperature interval from (293.15 to 313.15) K. TS solubility was determined in ethanol (EtOH), octanol (ROH), isopropyl myristate (IPM), chloroform (CL…
Although titanium and Ti–6Al–4V alloy have been widely used as dental materials, possible undesirable effects such as cytotoxic reactions and neurological disorder due to metal release led to the development of more corrosion resistant and V and Al free titanium alloys, containing Nb, Zr, Mo and Ta atoxic elements. Fl…
A nanostructured Cu with a mixture of nanocrystalline grains and nanoscale growth twins in submicrometer grains was synthesized by electrodeposition, and its mechanical behavior was tested on MTS-810 system at different strain rates and room temperature. It exhibited high yield stress of 506–717 MPa and good ductility…
Molecular dynamics simulations of the interaction between a screw dislocation and a 3.5 nm diameter bcc Cu precipitate in bcc Fe have been performed in the twinning and antitwinning direction between 10 and 400 K. The results indicate a significant temperature dependence in the antitwinning direction, whereby the scre…
The O17 and N93b quadrupole perturbed nuclear magnetic resonance spectra of multiferroic Pb(Fe1/2Nb1/2)O3 have been measured. The results show that the ordering at TN=143 K is antiferromagnetic with spin canting and that there is another magnetic transition around 20 K. The system consists of dielectric nanodomains an…
This study focused on the effect of plasticity on stress corrosion cracking of pipeline steel (X-52) in near neutral pH environment. A simulated near neutral pH soil solution, referred to as C-1, was used for all the tests. The effects of plastic deformation on both corrosion current and open circuit potential were st…
Hybrid ferromagnetic-semiconductor GaP:MnP thin films were grown at 650 °C by metal-organic vapor phase epitaxy on GaP(001) using trimethylgallium, tertiarybutylphosphine, and methyl cyclopentadienyl manganese tricarbonyl (MCTMn). Overall Mn concentrations in the hybrid films, determined by Rutherford backscattering s…
The electronic properties of clean and sulfur-terminated surfaces of InSb(001) and (111)B are investigated using x-ray photoemission spectroscopy and high-resolution electron energy loss spectroscopy. The clean surfaces exhibit upward band bending (electron depletion) consistent with the charge neutrality level in InS…
To understand the collinear-magnetism-driven ferroelectricity in the frustrated Ising spin chain, the fascinating magnetoelectric behavior is investigated by using Monte Carlo simulation based on one dimensional elastic Ising model. Our simulation quantitatively reproduces the experimental results of the complicated e…
Abstract Reaction rate and kinetics of cure between PMDI and castor oil, a tri‐functional polyol, for stoichiometric and off‐stoichiometric mole ratios, were studied through isoconversional analysis of DSC data and through gelation times and viscosity build up obtained through rheological techniques. The cure kinetics…
Abstract Activated carbons (AC) are commonly used as efficient adsorbents to remove contaminants. The incorporation of a magnetic material into the AC could greatly enhance its manipulation through magnetic separation. However, the composite material will need to have sufficiently saturated magnetization, and as low a…
Hydrogen atom transfer (HAT) reactions from dihydroanthracene to ArINTs (Ar = 2- tert-butylsulfonyl)benzene and Ts = p-toluenesulfonyl) is catalyzed by Mn(tpfc) (tpfc = 5,10,15-tris(pentafluorophenyl)corrole). Kinetics of HAT was monitored by gas chromatography. Conversion to the major products anthracene, TsNH 2, and…
AIMS: To develop an Aeromonas strain able to utilize inexpensive carbon sources such as starch for the synthesis of polyhydroxyalkanoates (PHA). METHODS AND RESULTS: A recombinant Aeromonas sp. (strain KC007-1) was constructed by introducing the PHB synthesis genes (phaCAB) into the bacterium. Strain KC001-R1 can not…
Magnetotransport properties of CrxFe3−xO4 (x≤0.95) thin films prepared using a sol-gel method were measured and analyzed in comparison with their magnetic properties. The samples were polycrystalline and exhibited a slight decrease in lattice constant as the Cr composition (x) increases. The observed decreasing trend…
Dynamic mechanical properties of polyester—montmorillonite nanocomposite thick films, prepared by the in situ intercalative polymerization method, were evaluated in a tensile mode. A fast fabrication procedure was chosen to allow industrial applications. A total time less than 1 h was sufficient to obtain a thick film…
We model interface formation by metal deposition on the conjugated polymer poly-para-phenylene vinylene, studying direct aluminum and layered aluminum-calcium structures Al/PPV and Al/Ca/PPV. To do that we use classical molecular dynamics simulations, checked by ab initio density-functional theory calculations, for se…
Magnetotransport and thermal studies of Pr2/3Sr1/3MnO3 polycrystalline sintered bulk sample are reported here. The resistivity ρ(T) and thermoelectric power S(T) data show an insulator to metal (I-M) phase transition at TP≈294 K and TS≈290 K, respectively. Magnetization measurement confirms that the sample undergoes a…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPseudo-Generational Effects Observed for a Series of Hyperbranched Polymers When Applied as Epoxidation CatalystsX. Zheng, I. R. Oviedo, and Lance J. Twyman*View Author Information Department of Chemistry, The University of Sheffiel…
Computational techniques for nanostructure determination of substances that resist standard crystallographic methods are often laborious processes starting from initial guess solutions not derived from experimental data. The Liga algorithm can create nanostructures using only lists of lengths or distances between atom…