Materials Literature
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A previously developed thermodynamic model of hydro‐thermal synthesis of ceramic powders has been extended to include cases when solid solutions are formed. The model has been applied to the synthesis of a series of lead titanate zirconate solid solutions PbZr x Ti 1– x O 3 (PZT, 0.46 < x ≤ 0.75). It predicts the o…
SUMMARY To extract quantitative electronic structure information from electron energy‐loss near‐edge structure typically necessitates the separation of spectra into linearly independent components. For this to be accomplished, certain conditions need to be met concerning the localization of chemical bonding and the li…
We use transient differential absorption experiments to investigate the ‘‘single dot’’ absorption line shape of CdSe quantum dots. We observe both a narrow (full width half maximum ∼5 meV) and a broad (∼50 meV) bleach component within the inhomogeneously broadened first absorption line of our samples. We deduce the si…
The composition of whole human and sheep cortical bone tissue, and of a synthetic hydroxyapatite (P120), were compared using Fourier transform Raman (FT-Raman) spectroscopy. Deproteination procedures to remove the bulk of the collagen present in bone tissue allowed isolation of the mineral phase. A comparison of the s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEXAFS and X-ray powder diffraction studies of the spin transition molecular materials [Fe(Htrz)2(trz)](BF4) and [Fe(Htrz)3](BF4)2.H2O (Htrz = 1,2,4-4H-triazole; trz = 1,2,4-triazolato)Alain Michalowicz, Jacques Moscovici, Bernard Ducourant, Denis Cracco, and Olivier KahnCite…
Knowledge of the orientations of several α plates inherited from the body-centred-cubic–hexagonal-close-packed phase transformation of a β grain allows us to determine the orientation of the latter, provided that a strict orientation relation between the two lattices exists. This contribution discusses the problem of…
The Compton scattering cross section on the proton has been measured at laboratory angles of 90\ifmmode^\circ\else\textdegree\fi{} and 135\ifmmode^\circ\else\textdegree\fi{} using tagged photons in the energy range 70--100 MeV and simultaneously using untagged photons in the range 100--148 MeV. With the aid of dispers…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Novel Reactive Polymeric Micelle with Aldehyde Groups on Its SurfaceCarmen Scholz, Michihiro Iijima, Yukio Nagasaki, and Kazunori KataokaCite this: Macromolecules 1995, 28, 21, 7295–7297Publication Date (Print):October 1, 1995Publication History Published online1 May 2002P…
A high-resolution in situ SEM (scanning electron microscope) has been configured for real time comparison studies of the electromigration characteristics of Cu and Cu(Sn) alloys. Drift velocity test structures were fabricated and used to simulate the Cu line/W via structure in the multilevel interconnects. Electromigr…
Unlike 7Li magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra, 6Li MAS NMR spectra of silicates are dominated by chemical shift effects, often have a very high resolution and hence can provide significant structural information. In this study we demonstrate a good correlation between 6Li isotropic chemi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of chemoresistive sensory materials: polythiophene-based pseudopolyrotaxanesMichael J. Marsella, Patrick J. Carroll, and Timothy M. SwagerCite this: J. Am. Chem. Soc. 1995, 117, 39, 9832–9841Publication Date (Print):October 1, 1995Publication History Published online1…
RATIONALE AND OBJECTIVES: Target-specific magnetic resonance (MR) contrast agents are being developed to improve the accuracy of MR imaging. The purpose of this study was to determine the mechanism of cell uptake, and modes of intracellular trafficking of a prototypical iron oxide label (RMA) used in the synthesis of…
To a given tiling a noncommutative space and the corresponding C*-algebra are constructed. This includes the definition of a topology on the groupoid induced by translations of the tiling. The algebra is also the algebra of observables for discrete models of one or many particle systems on the tiling or its periodic i…
Structural phase transitions ('type 0') in which there is no change of space group or of the occupied Wyckoff sites contrast with others in which diffusionless transformation can occur in a single step between higher-and lower-symmetry space groups (type I), through a low-symmetry transition state between relatively h…
We have developed low temperature nonaqueous solution methods as well as low power plasma ashing for the degradation of the organic matrix of bone power which have permitted us to obtain bone crystals essentially free of organic matrix constituents without any significant change in their composition, overall structure…
The formation of platinum sols (〈d〉 = 1.5-4 nm) in a methanol-water mixture by methanol reduction of ionic platinum in the presence of steric stabilizer poly(vinylpyrrolidone) has been studied by transmission electron microscopy and UV-visible spectrophotometry. A high concentration of chloride ions present in the rea…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLipase-Catalyzed Ring-Opening Polymerization of 12-DodecanolideHiroshi Uyama, Kazuhiro Takeya, Norio Hoshi, and Shiro KobayashiCite this: Macromolecules 1995, 28, 21, 7046–7050Publication Date (Print):October 1, 1995Publication History Published online1 May 2002Published ini…
A model of the formation of a p-type surface conductive layer on deposited diamond films is proposed. According to the model, the ionization of acid in water produces oxonium ion ( H 3 O + ) which reacts with hydrogen on diamond films and causes the creation of holes in diamond films. The model also explains the disap…
The vibrational and relaxational dynamics of glycerol has been measured by incoherent neutron scattering for energy transfers from some 10 \ensuremath{\mu}eV to several 10 meV, and for temperatures from 4 to 413 K. On heating towards and above the glass transition, scattering from low-frequency vibrations shows an uns…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of Ultrafine Metal Particles in Ethanol by UV Irradiation Using a PhotoinitiatorTetsuyuki Itakura, Kanjiro Torigoe, and Kunio EsumiCite this: Langmuir 1995, 11, 10, 4129–4134Publication Date (Print):October 1, 1995Publication History Publishe…