Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Recently, the synthesis of a new phase of ${\mathrm{MoS}}_{2}{\mathrm{I}}_{1/3}$ stoichiometry was reported [M. Remskar, A. Mrzel, Z. Skraba, A. Jesih, M. Ceh, J. Dem\ifmmode \check{s}\else \v{s}\fi{}ar, P. Stadelmann, F. L\'evy, and D. Mihailovic, Science 292, 479 (2001)]. Electron microscope images and diffraction d…
Abstract The crystallization behavior of poly(ethylene terephthalate) (PET) with disodium terephthalate (DST) as nucleating agent was investigated. A detailed analysis of the crystallization course from the melt was made with the Avrami expression. The results demonstrated that DST additive can promote the PET crystal…
Silver and copper halides generally display an abrupt (first-order) transition to the superionic state. However, powder diffraction studies and molecular dynamics (MD) simulations of AgI under hydrostatic pressure both indicate that a continuous superionic transition occurs on heating. The gradual onset of the highly…
The rate at which single-bubble sonoluminescence is quenched in the presence of alcohol is examined. Single-bubble sonoluminescence bubbles are generated in a partially degassed argon−water/alcohol mixture. Quenching rates are measured by recording the instantaneous bubble response and corresponding light emission dur…
Eingefangen: Ein Octasilsesquioxan mit einem Fluoridion als Gast wurde kristallstrukturanalytisch charakterisiert (siehe Bild). Struktur- und NMR-spektroskopischen Daten zufolge ist das eingeschlossene Fluoridion im Wesentlichen „nackt“. Da die Si-F-Wechselwirkungen nur schwach sind, weicht die Geometrie der Käfigverb…
The pressure effect on magnetic order and anisotropy of low-doped ${\mathrm{LaMnO}}_{3.05}$ single crystals with two competing ferromagnetic and antiferromagnetic insulating phases was studied by magnetization measurements. It was found that applied hydrostatic pressure leads to an increase of both Curie and N\'eel te…
We report a theoretical study on the effects of O 2 adsorption at tips of single-wall carbon nanotubes for capped and uncapped geometries. Adsorption mechanisms that take place at the tip, also including the effects of an electric field, are described, highlighting configurations that alter emission properties. Change…
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTPhotochemically Driven Smectic−Cholesteric Phase Transition in an Inherently Photoactive DimesogenV. Ajay Mallia and Nobuyuki TamaokiView Author Information National Institute of Advanced Industrial Science and Technology (AIST), Central 5, Higashi 1-1-1, Tsukuba, Ibaraki…
The nanosized icosahedral-based cluster [Pd69(CO)36(PEt3)18] (see picture) exhibits two new salient stereochemical features: 1) a linear face-condensation of three centered icosahedra that gives rise to a linear face-sharing Pd33-centered triicosahedron, and 2) a hexagonal-shaped Pd30 tube formed by cyclic trans edge-…
Three novel narrowly distributed rod−coil diblock copolymers, poly(styrene- block -(2,5-bis[4-methoxyphenyl]oxycarbonyl)styrene) (PS- b -PMPCS), with same PS block length and different PMPCS lengths, were synthesized by 2,2,6,6-tetramethyl-1-piperidinyloxy- (TEMPO-) mediated living free radical polymerization. The sel…
A global picture for the structural evolution in the relaxor-ferroelectric solid solution $({\mathrm{PbSc}}_{1/2}{\mathrm{Nb}}_{1/2}{\mathrm{O}}_{3}{)}_{1\ensuremath{-}x}\ensuremath{-}({\mathrm{PbTiO}}_{3}{)}_{x}$ is proposed. Thanks to x-ray profile analysis and Rietveld neutron powder refinement, a monoclinic phase…
We have successfully measured the sliding force for an interlayer of individual multiwall carbon nanotubes using a combination of a well-controlled electrical breakdown process and a manipulation process using a scanning electron microscope. A sliding force of ∼4 nN for an inner layer diameter of 5 nm is maintained co…
We present a theory of the anomalous Hall effect in ferromagnetic $(\mathrm{G}\mathrm{a},\mathrm{M}\mathrm{n})\mathrm{A}\mathrm{s}$ in the regime when conduction is due to phonon-assisted hopping of holes between localized states in the impurity band. We show that the microscopic origin of the anomalous Hall conductiv…
Bubble levitation in an acoustic standing wave is re-examined for conditions relevant to single-bubble sonoluminescence. Unlike a previous examination [Matula et al., J. Acoust. Soc. Am. 102, 1522-1527 (1997)], the stable parameter space [Pa,R0] is accounted for in this realization. Forces such as the added mass force…
The structures, magnetisms, and magneto-optical (MO) Kerr spectra of nanocrystalline ${\mathrm{CoFe}}_{2\ensuremath{-}x}{M}_{x}{\mathrm{O}}_{4}$ $(M=\mathrm{M}\mathrm{n},\mathrm{A}\mathrm{l},\mathrm{S}\mathrm{c})$ thin films have been systematically investigated by means of x-ray diffraction, atomic force microscopy,…
A series of organically modified clays (OMCs) with a surfactant loading range from 0.625 to 2.5 times the cation exchange capacity (CEC) were melt-mixed with maleated polypropylene (PPMA). Wide-angle X-ray diffraction and transmission electron microscopy results of these nanocomposites show that dispersion of clays be…
Optical and electron-spin resonance (ESR) spectroscopy studies of low-temperature electron-irradiated amorphous ${\mathrm{SiO}}_{2}$ were carried out to identify optical transitions of self-trapped holes (STHs). Spectroscopic analysis by means of polarized optical bleaching and thermal annealing has revealed two compo…
ADVERTISEMENT RETURN TO ISSUEPREVNoteSynthesis and Characterization of Anionic and Cationic Poly(ferrocenylsilane) PolyelectrolytesMark A. Hempenius, Fabiane F. Brito, and G. Julius VancsoView Author Information MESA+ Research Institute for Nanotechnology, University of Twente, P.O. Box 217, NL-7500 AE Enschede, The N…
The purpose of this research was to study the influence of the temperature, treatment time, and initial coal particle size on the evolution of the structural order of graphite materials that have been prepared from an anthracite at temperatures >2273 K. Crystalline parameters such as the interlayer spacing and crystal…
A $\ensuremath{\pi}$-electron network in nanographite systems with zigzag edges exhibits strongly localized edge states, which are expected to have peculiar properties. We study effects of electron-electron interactions on ground-state properties of zigzag nanographite ribbons and open-ended zigzag nanotubes by means…