Materials Literature
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A model for the structure of amorphous molybdenum trisulfide, a-MoS3, has been created using\nreverse Monte Carlo methods. This model, which consists of chains of MoS6 units sharing three sulfurs\nwith each of its two neighbors and forming alternate long, nonbonded, and short, bonded, Mo−Mo\nseparations, is a good fit…
Mechanical behaviour of metallized polyimide Kapton films was studied. The adhesion of metallized films to Kapton films is approximately hundred-folds higher than that of coatings made by usual sputter deposition of a metal on a polymer substrate. Multiple cracking of a metallized film was observed. Cracks of two diff…
The electrical and magnetic transport properties have been studied in a series of samples Nd0.7(Ca,Sr,Ba)0.3MnO3 with a fixed average A-site cation radius 〈rA〉 = 1.21 Å. The residual resistivity increases dramatically and the metal-transition and Curie temperatures decrease systematically with increasing A-site cation…
In this paper the effects of Fe-Fe bond length change on magnetic properties and magnetic entropy change have been investigated on LaFe12.4-xSixCo0.6 and LaFe12.3-xAlxCo0.7 intermetallic compounds. According to the analyses of Fe-Fe bond length change, the variation of Curie temperature and the unusual magnetic phase…
Abstract For Abstract see ChemInform Abstract in Full Text.
Second-order optical nonlinearity was found to be generated in high-purity silica glasses when they were exposed to x-ray radiation and then thermally poled. Two kinds of second-order optical nonlinearity, near-surface nonlinearity localized in a thin layer near the sample surface and bulk nonlinearity spreading throu…
The role of neutral radicals and charged ions in a low-pressure limit of plasma-enhanced chemical vapor deposition of diamond has been studied by plasma diagnostics and a kinetic rate analysis for radicals. The fluxes of atomic hydrogen (H), methyl radicals (CH3), and ionic species were determined by optical absorptio…
The family of solid solutions of the type β-K2(Bi1−zSbz)8Se13 (0<z⩽1) was studied with respect to thermal conductivity as a function of temperature and stoichiometry. At low temperature, the variation of lattice thermal conductivity with composition shows a transition from a typical crystalline to glasslike beh…
The dynamics of polarization switching have been investigated over extremely broad time (10−8<t<102 s) and field ranges for hard, soft, and relaxor ferroelectrics based on aliovalent modified Pb(Zr1−xTix)O3. The results unambiguously demonstrate important differences in the polarization switching mechani…
The magnetic structure and magnetic phase transitions of the ${\mathrm{Pr}}_{5}{\mathrm{Ge}}_{4}$ compound are investigated by means of neutron powder diffraction (NPD) and small-angle neutron scattering (SANS). Both NPD and SANS indicate the existence of two magnetic phase transitions at 25 K and 42 K. Refinement of…
Abstract Poly(butylene adipate‐ co ‐succinate) (PBAS), an aliphatic polyester, is known for its excellent biodegradability, but its physical and mechanical properties are poor. To improve the physical properties, stiff aromatic rings were added to PBAS through transesterification with poly(ethylene terephthalate) (PET…
The pyridoxal 5'-phosphate-dependent enzymes tyrosine phenol-lyase and tryptophan indole-lyase were encapsulated in wet nanoporous silica gels, a powerful method to selectively stabilize tertiary and quaternary protein conformations and to develop bioreactors and biosensors. A comparison of the enzyme reactivity in si…
A continuum equation for the shadowing growth of individual nanostructures by oblique angle deposition is proposed and numerically integrated. The radius R of rotationally symmetric columns is calculated as a function of height z. Before the radius R saturates at its final value Rsat, column shapes obey the power law…
A Hall mobility as high as 39.4 cm2 V−1 s−1 was obtained for cadmium indate (CdIn2O4) thin films deposited by rf reactive sputtering from a Cd–In alloy target. The structural and electrical properties for both as-sputtered and after-annealed thin films were studied as a function of the substrate temperatures. The resu…
Abstract A novel fluorinated diamine monomer, 1,4‐bis(4‐amino‐2‐trifluoromethylphenoxy)‐2,5‐di‐ tert ‐butylbenzene ( 2 ), was prepared through the nucleophilic substitution reaction of 2‐chloro‐5‐nitrobenzotrifluoride and 2,5‐di‐ tert ‐butylhydroquinone in the presence of potassium carbonate, followed by catalytic red…
The microstructure, static and dynamic magnetic and dielectric properties of BaCo1.3Zn0.7Fe16O27 doped with small amounts of SiO2 have been investigated. The results show that the crystal structure and static magnetic properties have no obvious changes as SiO2 varies from 0 to 1 wt %. However, the complex permittivity…
We present a novel ground state that explains the continuous charge modulated diagonal order recently observed in manganese oxides, at hole concentrations x larger than one-half. In this diagonal phase the charge is modulated with a predominant Fourier component inversely proportional to 1-x. Magnetically this state c…
Abstract Lanthanum hexacyanoferrate (LaHCF) was immobilized onto a substrate surface as an electroactive material by Au‐codeposition method. The LaHCF particles were attached to the electrode surface as the result of occlusion within the gold film deposited. This deposition method was first introduced for the preparat…
Abstract For Abstract see ChemInform Abstract in Full Text.
Abstract The kinetics of natural rubber vulcanization were investigated by use of a vulcameter. The vulcanization process before t dis (the time when the accelerators and/or intermediates react to depletion) was expressed in an equation as ln( M H − M t ) = ln A − k 1 ( t − t 0 ) α , which is different from the famous…