Materials Literature
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Primary and secondary radiation forces result from pressure gradients in the incident and scattered ultrasonic fields. These forces and their dependence on experimental parameters are described, and the theory for primary radiation force is extended to consider a pulsed traveling wave. Both primary and secondary radia…
The compounds Cs 12 [V IV 18 O 42 (H 2 O)]·14H 2 O ( 1a ), K 12 [V IV 18 O 42 (H 2 O)]·16H 2 O ( 1b ), Rb 12 [V IV 18 O 42 (H 2 O)]·19H 2 O ( 1c ), K 9 [H 3 V IV 18 O 42 (H 2 O)]·14H 2 O·4N 2 H 4 ( 1d ), K 11 [H 2 V IV 18 O 42 (Cl)]·13H 2 O·2N 2 H 4 ( 2a ), K 9 [H 4 V IV 18 O 42 (Br)]·14H 2 O·4N 2 H 4 ( 2b ), K 9 [H 4…
The molecular weight distribution (MWD) and its moments are calculated for hyperbranched polymers formed by self-condensing vinyl polymerization (SCVP) of monomers (“inimers”) with the general structure AB*, where A is a vinyl group and B* is an initiating group. The calculated MWD is extremely broad, the polydispersi…
Electrostriction is the basis of electromechanical coupling in all insulators. The quadratic electrostrictive strain x ij associated with induced polarization components P k and P l is given by x ij = Q ijkl P k P l . Two converse electrostrictive effects may also be defined. In this paper, some trends in structure−pr…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTWide Thermal Hysteresis for the Mononuclear Spin-Crossover Compound cis-Bis(thiocyanato)bis[N-(2'-pyridylmethylene)-4-(phenylethynyl)anilino]iron(II)Jean-François Létard, Philippe Guionneau, Epiphane Codjovi, Olivier Lavastre, Georges Bravic, Daniel Chasseau, and Olivi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleOxidation of Pollutants Catalyzed by MetallophthalocyaninesBernard Meunier and Alexander SorokinView Author Information Laboratoire de Chimie de Coordination du CNRS, 205 route de Narbonne, 31077 Toulouse, Cedex 4, France Cite this: Acc. Chem. Res. 1997, 30, 11, 470–476Publicati…
We describe the numerical procedure for calculating three-dimensional profiles of temperature in a multilayer stack illuminated by a laser beam, and model the crystallization and amorphization kinetics for phase-change rewritable media. Experimental methods have been used to determine indirectly the probabilities of n…
Many organisms contain proteins which regulate the size and shape of inorganic crystals in their skeletal elements, most likely through specific protein−crystal surface interactions. As a model for better understanding such control of crystal morphology, an α-helical peptide (CBP1) was synthesized having an array of a…
Although several dextran-coated iron oxide preparations are in preclinical and clinical use, little is known about the mechanism of uptake into cells. As these particles have been shown to accumulate in macrophages and tumor cells, we performed cellular uptake and inhibition studies with a prototypical monocrystalline…
The reversible kinetics of l -lactide bulk polymerization with tin(II) ethylhexanoate was determined over a wide range of temperatures, 130−220 °C, and monomer to initiator molar ratios, 1000−80 000. Both polymerization and depolymerization are accurately described by a reversible model with a propagation term that is…
Optical microscopy, neutron reflectivity, and small angle neutron scattering studies were used to investigate the structure of thin films of symmetric diblock copolymers of P(dS- b -MMA) as the interactions between the copolymer and the substrate were changed in a systematic manner. In cases where there was a strong p…
We have succeeded in controlling the saturation magnetization ${(I}_{S}),$ the Weiss temperature (\ensuremath{\theta}), and the coercive field ${(H}_{c})$ using compounds in the series $({\mathrm{Ni}}_{x}^{\mathrm{II}}{\mathrm{Mn}}_{1\ensuremath{-}x}^{\mathrm{II}}{)}_{1.5}{[\mathrm{Cr}}^{\mathrm{III}}(\mathrm{C}\mathr…
Titania−silica mixed oxides are intriguing catalysts and catalyst supports since their surface reactivities depend strongly on composition and homogeneity of mixing. In this review, the synthesis, characterization, and catalytic activity of titania−silica are described, and important structure/property relationships f…
The lamellar compound ${\mathrm{CuInP}}_{2}{\mathrm{S}}_{6}$ is presented as an unusual example of a collinear, two-sublattice ferrielectric system. Single-crystal x-ray diffraction is used to study the thermal evolution of the polar character of its structure. The results are consistent with the occurrence of a first…
Using a modified definition, the average degree of branching,, the fraction of branchpoints,, as well as the fractions of various structural units are calculated as a function of conversion of double bonds for hyperbranched polymers formed by self-condensing vinyl polymerization (SCVP) of monomers (or “inimers”) with…
This article presents a review of constitutive theories, mechanics, and structural applications of shape memory alloys. Although these materials possess a number of unique features, this review is concerned with the shape memory effect and superelasticity, since they are most often discussed in the context of possible…
It is well established that sequence templates such as those in the PROSITE and PRINTS databases are powerful tools for predicting the biological function and tertiary structure for newly derived protein sequences. The number of X-ray and NMR protein structures is increasing rapidly and it is apparent that a 3D equiva…
MCM-41 periodic mesoporous silicates were synthesized using cetyltrimethylammonium bromide, and their pore sizes were tailored by postsynthesis hydrothermal treatment method of Khushalani et al., allowing us to obtain large-pore MCM-41 samples with a high degree of structural ordering. It was shown that the pore size…
Simple synthesis methods for mesoporous fibers and powders by rapid evaporation of hydrolyzed silicon alkoxide−surfactant solutions are described. Mesoporous fibers are prepared by dry spinning, and mesoporous powders by spray drying of alkoxide−surfactant solutions. Precursor solutions, containing fully hydrolyzed te…
Alternate layer-by-layer assembly of colloidal SiO 2 particles with polycations has been investigated by quartz crystal microbalance (QCM), scanning electron microscopy (SEM), and atomic force microscopy (AFM). QCM measurement confirmed the high regularity and reproducibility of the assembling process that depends on…