Materials Literature
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A recently developed class of magnetic field sensors is based on the action of a magnetostrictive material on a piezoelectric material. Described here is a significant improvement on this class, a passive magnetic field sensor made of layers of Terfenol-D {Fe<sub>2</sub>(Dy<sub>0.7</sub>Tb<sub>0.3</sub>)} magnetostric…
A novel photooxidative system for degrading toxic organic pollutants, including organic dyes and small molecular compounds such as Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), is reported. A metal−organic complex (β-cyclodextrin−hemin, CDH), synthesized by combining β-CD with the bioactive small molecule hemin, can…
Two novel coordination polymers of Co(II) with dicyanamide (dca) were obtained by the addition of ancillary ligands of pyrazine dioxide (pzdo) and 2-methyl pyrazine dioxide (mpdo) into the Co-dca binary system, respectively. Co[N(CN)(2)](2)(pzdo) (1) crystallizes in the orthorhombic space group of Pnnm (No. 58) with a…
Abstract This study sought to synthesize an in situ epoxidized natural rubber (NR) from 20% dry rubber content latex stabilized by nonionic surfactant, 5 phr of Terric 16A16, in the presence of hydrogen peroxide and formic acid at the temperature of 50°C. The molar ratios of H 2 O 2 and HCOOH to isoprene unit were equ…
The effect of cetyltrimethylammonium bromide (CTAB) template concentration, solvent conditions, and silica source on the structure and self-assembly of mesoporous nanoscale silica/gold composites was investigated. Nanocomposites were analyzed using X-ray diffraction, transmission electron microscopy, and liquid nitrog…
Abstract In this study soybean oil triglycerides were reacted with maleic anhydride in an ene reaction to introduce more than two maleate residues per triglycerides. The maleinized soybean oil (SOMA) was then polymerized with diols to the half‐ester stage only. Two different types of alcohols was used in this work: (1…
The [Fe(PM-BiA)(2)(NCS)(2)] complex, where PM is N-2-pyridylmethylene and BiA is 4-aminobiphenyl, crystallizes in two polymorphs. The two phases, denoted (I) and (II), undergo a spin-crossover when the sample is cooled and present distinct spin-transition features as (I) shows a very abrupt spin transition, while (II)…
Traditional lithographically defined quantum wells in 2D electron gases are often too big (several hundreds of nanometers to a few micrometers) to exhibit single-electron effects at room temperature. Here, a structure is proposed that makes use of the electromechanical properties of single-walled carbon nanotubes to f…
The antiphase domain structure in epitaxial ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ films determines its physical properties such as superparamagnetism, resistivity, and magnetoresistance. A good knowledge and control of the domain sizes in these films is therefore of utmost importance. We report on the finding that the a…
Carbon nanotubes (CNTs) were grown vertically aligned on silicon oxide substrates by pyrolyzing iron phthalocyanine (FePc), cobalt phthalocyanine (CoPc), and nickel phthalocyanine (NiPc) in the temperature range 700−1000 °C. As the temperature increases from 700 to 1000 °C, the growth rate of CNTs increases by a facto…
BACKGROUND: Treatment of cancer-bearing mice and dogs with micronized zeolite clinoptilolite (MZ) led to improvement of the overall health status, prolongation of life span and decrease of tumor size in some cases. It also reduced lipid peroxidation in the liver of mice. MATERIALS AND METHODS: The experiments were per…
The response of an extended periodic system to a homogeneous field (of wave-vector $q=0)$ cannot be obtained from a $q=0$ time-dependent density functional theory (TDDFT) calculation, because the Runge-Gross theorem does not apply. Time-dependent current--density functional theory is needed and demonstrates that one k…
The atomic pair distribution function (PDF) technique is employed to probe the atomic local structural responses in naturally double layered manganites \lsmo in the doping range $0.54 \leq x \leq 0.80$. Our low temperature neutron powder diffraction measurements suggest the coexistence of two different Jahn-Teller (JT…
We report direct experimental evidence showing induced magnetic moments on Ge at the interface in an Fe/Ge system. Details of the x-ray magnetic circular dichroism and resonant magnetic scattering at the Ge L edge demonstrate the presence of spin-polarized {\it s} states at the Fermi level, as well as {\it d} characte…
Results from dielectric and structural measurements on epitaxial ${\mathrm{SrTiO}}_{3}/{\mathrm{BaZrO}}_{3}$ superlattices reveal properties that cannot be explained simply in terms of those measured on single films of the constituent materials. For large superlattice periodicities (20/20 and 38/38 structures---i.e.,…
We provide experimental evidence that the upper limit of \ensuremath{\sim}110 K commonly observed for the Curie temperature ${T}_{C}$ of ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ thin films (thickness >50 nm) is caused by Fermi-level-induced hole saturation. Ion channeling, electrical, and magn…
We study shear yielding and steady state flow of glassy materials with molecular dynamics simulations of two standard models: amorphous polymers and bidisperse Lennard-Jones glasses. For a fixed strain rate, the maximum shear yield stress and the steady state flow stress in simple shear both drop linearly with increas…
Effects of an incoming spin-polarized current on a magnetic moment are explored. We found that the spin torque occurs only when the incoming spin changes as a function of time inside of the magnetic film. This implies that some modifications are necessary in a phenomenological model where the coefficient of the spin t…
Accurate determination of carrier densities in ferromagnetic semiconductors by Hall measurements is hindered by the anomalous Hall effect, and thus alternative methods are being sought. Here, we propose that cyclotron resonance (CR) is an excellent method for carrier density determination for InMnAs-based magnetic str…
The identification of relevant collective coordinates is crucial for the interpretation of coherent nonlinear spectroscopies of complex molecules and liquids. Using an $\hbar$ expansion of Liouville space generating functions, we show how to factorize multitime nonlinear response functions into products of lower-order…