Jonathan V. Caspar、V. Ramamurthy、David R. Corbin1991-01-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModification of photochemical reactivity by zeolites. Preparation and spectroscopic characterization of polarons and bipolarons of thiophene oligomers within the channels of pentasil zeolites: the evolution of organic radical ions into conducting polymersJonathan V. Caspar,…
Electrocatalysts for Energy ConversionConducting polymers and applicationsMolecular Junctions and Nanostructures
WS Johnson、PA Lagace、JE Masters 等 8 位作者1991-01-01Journal of Composites Technology and Research
The transverse tensile behavior of a composite composed of unidirectional silicon-carbide fiber (Textron SCS-6) in a Ti-6AL-4V matrix is examined with emphasis on the effects of fiber-matrix interface strength. The residual stresses as a result of a mismatch in the coefficients of thermal expansion of silicon carbide…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesAdvanced Surface Polishing Techniques
David P. Pappas、K.-P. Kämper、Brian Miller 等 8 位作者1991-01-01Physical Review Letters
Spin-polarized photoemission spectra at low photon energies from ferromagnetic ultrathin Fe layers on Cu(100) show a substantial polarization of the Cu 3d peaks. This is attributed to spin-dependent attenuation in the Fe overlayer. Values of the spin-dependent mean free path at low electron energies are obtained.
Magnetic properties of thin filmsElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
A. Venkateswara Rao、François Ozanam、J.‐N. Chazalviel1991-01-01Journal of The Electrochemical Society
We report on an experimental investigation of porous silicon layer (PSL) formation and silicon/hydrofluoric acid interfaces, using internal‐reflection Fourier‐transform infrared spectroscopy and Fourier‐transform electrochemically modulated infrared spectroscopy. Low‐doping Si samples ( , resistivity ≈4 Ω cm) have bee…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsElectrochemical Analysis and Applications
Shu Hotta、Katsunori Waragai1991-01-01Journal of Materials Chemistry
The alkyl-substituted oligothiophenes with varying degree of polymerization have been characterized both in their neutral and in their doped forms. Large blade-shaped crystals of these compounds are readily accessible through recrystallization. Thin films of the oligothiophenes are also obtained from casting or vacuum…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsOrganic and Molecular Conductors Research
Shuzhen Liu、HONG GUANG-YAN、Ninghai Hu 等 4 位作者1991-01-01Acta Physica Sinica
The crystal stucture and phase transition of PrP5O14 have been studied by X-ray diffraction methode. The crystal belongs to monoclinic system at room temperature. The structure parameters are as follows: a = 8.777(l)?, b = 9.029(2)?, c= 13.068(2)?, β=90.35°(l), z=4. The space group is P21/c. The final R is 0.046. The…
Solid-state spectroscopy and crystallography
L. Hardie1991-01-01Annual Review of Earth and Planetary Sciences
Carbonatites are igneous rocks formed in the crust by fractional crystallization of carbonate-rich parental melts that are mostly mantle derived. They dominantly consist of carbonate minerals such as calcite, dolomite, and ankerite, as well as minor ...Read More
Calcium Carbonate Crystallization and Inhibition
D. Gosset、M. Guéry、B. Kryger1991-01-01AIP conference proceedings
Among the boron rich materials, boron carbide B4C is presently the preferred neutron absorber for nuclear reactors but other boron‐rich compounds are of potential interest. We present here a study of some of the crucial properties for in‐reactor behavior: thermal conductivity and mechanical properties (Young modulus),…
Aluminum Alloys Composites PropertiesBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
J. Bixby1991-01-01Annual Review of Cell and Developmental Biology
Cells organize many of their biochemical reactions in non-membrane compartments. Recent evidence has shown that many of these compartments are liquids that form by phase separation from the cytoplasm. Here we discuss the basic physical concepts necessary ...Read More
Supramolecular Self-Assembly in Materials
Wolfgang Tremel1991-01-01Journal of the Chemical Society Chemical Communications
The new ternary layer compounds Nb2Co2Te4 and TaCo2Te2 have been prepared by reaction of the elements at high temperature; isolated and condensed M2Co2(M = Nb or Ta) clusters are the structural key features of these unusual layer compounds, tight-binding band structure calculations indicate the importance of Nb–Co(Ta–…
2D Materials and ApplicationsIron-based superconductors researchInorganic Chemistry and Materials
Kathleen I. Chane‐Ching、M. Lequan、Rose-Marie Lequan 等 5 位作者1991-01-01Journal of the Chemical Society Faraday Transactions
The synthesis of {4′-[methyl(diphenyl)phosphonio]biphenyl-4-yl}triphenylborate (PBB) and 4′-(diphenylphosphino)biphenyl-4-yl(methyl)diphenylphosphonium hexafluorophosphate (PBP) is described. The properties of PBP and PBB are investigated by absorption and fluorescence spectroscopy. Diphenylphosphine is found to be a…
Nonlinear Optical Materials ResearchPhotochemistry and Electron Transfer StudiesMolecular spectroscopy and chirality
Hiroyuki Tomita1991-01-01Progress of Theoretical Physics
A practical conservation law related to isotropy is proposed for the deterministic Cahn-Hilliard equation, i.e., the order parameter conserving TDGL model. In order to examine it a dipole moment of the order parameter distribution in a two dimensional system is numerically calculated by using the cell-dynamics method…
Theoretical and Computational PhysicsSolidification and crystal growth phenomenananoparticles nucleation surface interactions
A. Motori、Franco Sandrolini、Gian Carlo Montanari1991-01-01IEEE Power Engineering Review
The electrical, thermal, and multiple-stress (thermal and electrical) aging of cross-linked polyethylene (XLPE) cable models has been investigated in order to get information on aging effects and mechanisms. After endurance tests, XLPE cable models have been subjected to chemical, physical, electrical, and microstruct…
High voltage insulation and dielectric phenomenaElectrostatic Discharge in ElectronicsElectrical Fault Detection and Protection
Andoni Gil、A Diaz、Mario Montes1991-01-01Journal of the Chemical Society Faraday Transactions
The effect of passivation and the influence of reactivation conditions on the metallic dispersion of nickel catalysts have been investigated. Catalysts were prepared on silica and alumina supports by different methods. After reduction, samples were passivated at room temperature with 1% O2 in an inert flow. The passiv…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Rm. Muthiah、R. Manjari、V. N. Krishnamurthy 等 4 位作者1991-01-01Polymer Engineering and Science
Abstract Hydroxyl terminated polybutadine (HTPB) based composite solid propellants have gained prominence in advanced missiles and launch vehicles including the Space Shuttle's Inertial Upper Stage (IUS) motor (1). To achieve a blow‐hole free well performing casting, the knowledge of the processability characteristics…
Polymer crystallization and propertiesEnergetic Materials and CombustionRheology and Fluid Dynamics Studies
Hongbo Yang、G. Gurewitz、A.K. Mukherjee1991-01-01Materials Transactions JIM
The superplastic deformation of fine grained Ti–6Al–4V has been studied under uniaxial tensile test condition at temperatures of 750, 800 and 850°C and at strain rates in the range of 5×10−6–2×10−4 s−1. Constant strain rate and stepped true strain rate tensile tests were performed to determine the mechanical behavior…
Microstructure and mechanical propertiesMetallurgy and Material FormingTitanium Alloys Microstructure and Properties
Timothy C. Granata1991-01-01Limnology and Oceanography
Growth and sinking rates varied over a 61.4‐h period for semicontinuous cultures of the marine diatom Coscinodiscus concinnus grown at light intensities of 48 and 9 µ Einst m −2 s −1 on a 12L : 12D cycle. The time‐course of sinking rates showed cyclic fluctuations, with sinking rates generally decreasing during the da…
Marine and coastal ecosystemsDiatoms and Algae ResearchCephalopods and Marine Biology
Minoru Akaishi、Toshikazu Ohsawa、Shinobu Yamaoka1991-01-01Journal of the American Ceramic Society
Sintering of a fine‐grained polycrystalline diamond compact with grains less than 1 μm in size was successfully carried out by making a laminate on a WC/Co powder compact under sintering conditions of 5.8 GPa and 1430° to 1480°C for 30 min, in which small amounts of poly(ethylene glycol) and fine powder of cubic boron…
Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchAdvanced materials and composites
Takashi Furuya、Junji Kawafuku、Hiroshi Satoh 等 6 位作者1991-01-01ISIJ International
The corrosion resistance of titanium exposed in nitric acid vapor is generally inferior to that immersed in nitric acid solution because of an inhibitor effect of elements dissolved by corrosion of titanium in the solution.A new type corrosion testing apparatus, which would not be influenced by such dissolved elements…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability
Satoyuki Chikaoka、Toshikazu Takata、Takeshi Endo1991-01-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel polymerization behavior of spiroorthoester: an equilibrium polymerizationSatoyuki Chikaoka, Toshikazu Takata, and Takeshi EndoCite this: Macromolecules 1991, 24, 1, 331–332Publication Date (Print):January 1, 1991Publication History Published online1 May 2002Published…
Polymer crystallization and properties