Materials Literature
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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…
Single molecule spectroscopy was used to measure the rotations of fluorescent probe molecules in thin films of poly(methyl acrylate) and poly( n -butyl methacrylate) just above their glass-transition temperatures. By collecting the polarized fluorescence from isolated probe molecules, the rotational diffusion of singl…
Therapies directed toward stimulation of angiogenesis seek to accelerate the development of new blood vessels in tissues rendered dysfunctional because of an insufficient microvascular supply. The goal of the current study was the stimulation of an angiogenic response around and within porous biomedical implants, such…
Temperature variation of the magnetic susceptibility \ensuremath{\chi}, resistivity \ensuremath{\rho}, specific heat C, and lattice constants has been investigated in electron-doped ${\mathrm{CaMnO}}_{3}.$ The parent ${\mathrm{CaMnO}}_{3}$ is an antiferromagnetic band insulator, and shows an insulator-metal crossover…
Transition metals are well known as optically active dopants in crystalline hosts because they fluoresce broadly in the near-IR; examples include Ti<SUP>3+</SUP>:sapphire (Al<SUB>2</SUB>O<SUB>3</SUB>) and Cr<SUP>4+</SUP>:forsterite (Mg<SUB>2</SUB>SiO<SUB>4</SUB>). Because transition element ions yield stronger optical…
A synthetic unsymmetrical 1-galactosamide bolaamphiphile self-assembles in methanol to form a multilayer structure comprising unsymmetrical monolayer lipid membranes linked via a sugar-carboxylic acid H-bonding interface.
The synthesis and characterization of a copper(I) complex containing two-coordinated chelating verdazyl radicals are described. The structure (shown) consists of a distorted tetrahedral geometry at the copper ion; the angle between the planes defined by the two verdazyl rings is nearly 116°. Variable-temperature magne…
The interactions between organic matter and clay minerals are among the most widespread reactions in nature. The adsorption of organic material by clay miner als has been widely investigated during the last decade and has been extensively reviewed (see, e.g., Weiss, 1969; Mortland, 1970; Theng, 1974, 1979; Yariv and…