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。
We present a phase field model of solidification which includes the effects of the crystalline orientation in the solid phase. This model describes grain boundaries as well as solid-liquid boundaries within a unified framework. With an appropriate choice of coupling of the phase field variable to the gradient of the c…
A general scheme is developed to analyze the effect of non-uniform thermal magnetization fluctuations in a thin film. The normal mode formalism is utilized to calculate random magnetization fluctuations. The magnetization noise is proportional to the temperature and inversely proportional to the film volume. The total…
Four lacunary PW9O349− ions (blue polyhedra) are held together by eight MIII (M = Y, Eu) ions and seven W atoms that form a [M8W7O30]6+ network (center) in the novel heteropolyoxometalates [(PM2W10O38)4(W3O14)]30−. In the solid state, the anions interact strongly with K+ countercations, which thus play a role in the f…
Fatigue-free and highly c-axis oriented Bi3.15Sm0.85Ti3O12 (BSmT) thin films were grown on Pt/TiO2/SiO2/Si(100) substrates using the method of metalorganic sol decomposition. The BSmT film capacitor with a top Pt electrode showed significantly improved values of the remanent polarization (2Pr) and the nonvolatile char…
We report on the electrical characterization of single-crystal ZnO and Au Schottky contacts formed thereon before and after bombarding them with 1.8 MeV protons. From capacitance–voltage measurements, we found that ZnO is remarkably resistant to high-energy proton bombardment and that each incident proton removes abou…
Electric-field-directed growth of single-walled carbon nanotubes by chemical-vapor deposition is demonstrated. The field-alignment effect originates from the high polarizability of single-walled nanotubes. Large induced dipole moments lead to large aligning torques and forces on the nanotube, and prevent randomization…
Reverse Monte Carlo (RMC) modelling is a general method of structural modelling based on experimental data. RMC modelling can be applied to many different sorts of data, simultaneously if wished. Powder and single-crystal neutron diffraction (including isotopic substitution), x-ray diffraction (including anomalous sca…
In deep submicron VLSI circuits, interconnect reliability due to electromigration and thermal effects is fast becoming a serious design issue particularly for long signal lines. This paper presents for the first time a rigorous coupled analysis of AC electromigration that are prevalent in signal lines and thermal effe…
It is shown that the experimentally observed inverse linear decay of surface corrugations in Si(001) (Erlebacher et al., Phys. Rev. Lett. 84, 5800 (2000)) is due to the two dimensional nature of the surface in the experimental system. The theory of one dimensional surface relaxation predicts in this case an exponentia…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSrZn(SeO3)2 Containing Novel ZnO4+2 Bicapped TetrahedraMagnus G. Johnston and William T. A. HarrisonView Author Information Department of Chemistry, University of Aberdeen, Aberdeen AB24 3UE, Scotland Cite this: Inorg. Chem. 2001, 40, 25, 6518–6520Publication Date (Web):Novembe…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSynthesis of Periodic Mesoporous Organosilicas with Block Copolymer TemplatesMark C. Burleigh, Michael A. Markowitz, Eva M. Wong, Jar-Shyong Lin, and Bruce P. GaberView Author Information Laboratory for Molecular Interfacial Interactions, Code 6930, Center for Bio/Mole…
The swelling of thin biocompatible polymeric films under water has been characterized by spectroscopic ellipsometry. The films were formed by coating a copolymer (PC 100B) onto optically flat silicon oxide surface. PC 100B has a polymethacrylate backbone bearing pendent zwitterionic phosphorylcholine (PC) groups (23 m…
Ordered mesoporous materials have been synthesized by co-condensation of bis(triethoxysilyl)ethane and N -(2-aminoethyl)-3-aminopropyltrimethoxysilane (AAPTS) under basic conditions with supramolecular templates of cetyltrimethylammonium chloride as structure-directing agents. Incorporation of the templates into the m…
Brillouin light scattering from silicon oxynitride films grown on GaAs reveals a low frequency elastic wave excitation at frequencies lying below that of the Rayleigh surface wave. This mode, identified as an excitation localized by the interface, arises from the presence of a soft, thin transition layer between the f…
We present a detailed study, within the mean-field approximation, of an impurity band model for III-V diluted magnetic semiconductors. Such a model should be relevant at low carrier densities, below and near the metal-insulator transition. Positional disorder of the magnetic impurities inside the host semiconductor is…
Thermal analysis has not been as widely adopted in the study of organo-clay complexes as either x-ray diffraction or infrared spectroscopy. Nevertheless, since the end of the 1940s there have appeared numerous papers dealing with this subject, predominantly aimed at an understanding of the fundamental science, reporti…
A surface modification method that is particularly applicable to complexly shaped fabricated devices has long been awaited. In this article, we describe the visible-light-induced surface photograft polymerization technique by which an inner surface of the device is modified by visible-light irradiation through the ext…
The term “ clay minerals” is derived from the definition originally used by sedimentologists and soil scientists for the fraction of particles having very small size, with an equivalent diameter smaller than 2 μιη, which is the “ clay fraction.” Particles in this size range can include quartz, carbonates, metal oxides…
Radical chain transfer to bonded thiol groups and surface re-initiated polymerization resulted in ultra-thin polymer films.
The substitution of a terminal hydride ligand in the complexes [Ir(2)(mu-H)(mu-Pz)(2)H(3)(L)P(i)Pr(3))(2)] (L = NCCH(3) (1) or pyrazole (3)) by chloride provokes a significant change in the lability of the L ligand, despite the fact that the substituted hydride and the L ligand lie in opposite extremes of the diiridiu…