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。
As part of a series of studies on energy transfer processes between optical centers in condensed matter, an analysis is made of the problem of a crystalline system made up by a majority of regular optical centers and small amounts of defective optical centers. Within the conceptual framework of the crystal model, anal…
Depopulation of the S2 excited electronic state of the Zn-tetraphenylporphyrin (ZnTPP) was monitored by measuring the decay of S2→S0 and the rise of S1→S0 fluorescence using the up-conversion fluorescence technique with a time-resolution of 120 fs. The lifetime of the S2 electronic state, measured for ZnTPP in ethanol…
Monodisperse melts of ABC linear triblock copolymer are examined using self-consistent field theory (SCFT). Our study is restricted to symmetric triblocks, where the A and C blocks are equal in size and the A/B and B/C interactions are identical. Furthermore, we focus on the regime where B forms the majority domain. T…
Tight-binding electronic band structures of cesium trihalometalates CsGeX(3) (X = Cl, Br) were calculated to examine the pressure-dependence of their crystal structures and band gaps as well as their primitive cubic to rhombohedral structural phase transitions. In agreement with experiment, our calculations show that…
We introduce a model for fractures in quenched disordered media. This model has a deterministic extremal dynamics, driven by the energy function of a network of springs (Born Hamiltonian). The breakdown is the result of the cooperation between the external field and the quenched disorder. This model can be considered…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeterogeneous CatalysisNoritaka Mizuno and Makoto MisonoView Author Information Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan Cite this: Chem. Rev. 1998, 98, 1, 199–218Publication Date (Web):Janua…
In recent years much attention has been paid to the study of radiation-induced defects in laser and luminescent materials, since they affect the optical and stimulated emission properties. Defects in : powder prepared by solid state diffusion have been studied by thermoluminescence (TL) and fluorescence measurements.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultifunctional and Chiral Porphyrins: Model Receptors for Chiral RecognitionHisanobu Ogoshi and Tadashi MizutaniView Author Information Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01, Japa…
The paper reviews solid-catalyzed oxidation and reduction processes for the treatment of wastewater that contains small concentrations of toxic compounds and for which separation is not economical while biological treatment is not feasible. Specifically, the objectives are (1) to understand the interactions between ca…
Mercaptopropyl-functionalized porous silicates were synthesized by the co-condensation of (mercaptopropyl)triethoxysilane and tetramethoxysilane in the presence of a cationic surfactant. The ordered hexagonal arrays of channels in the extracted product were microporous (14 Å pore diameter) and contained high concentra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxometalate-Based Molecular MaterialsEugenio Coronado and Carlos J. Gómez-GarcíaView Author Information Departamento de Química Inorgànica, Universitat de València, Doctor Moliner 50, 46100 Burjassot, Spain Cite this: Chem. Rev. 1998, 98, 1, 273–296Publication Date (Web)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhoto- and Electrochromism of Polyoxometalates and Related MaterialsToshihiro YamaseView Author Information Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, JapanCite this: Chem. Rev. 1998, 98, 1, 307–326Pu…
The absorption of dilute NO x gas was studied, at atmospheric pressure, in an industrial column packed with 25-mm plastic Pall rings. The scrubbing liquid was a dilute hydrogen peroxide solution. NO x removal efficiencies of 75−91% were obtained for gas mixtures with partial pressures of NO x in the range of 62.8−460…
The crystal and magnetic structures of the n = 3 Ruddlesden−Popper phase with the ideal composition Ca 4 Mn 3 O 10 have been studied using X-ray and neutron powder diffraction. The crystal structure at 293 K is relatively insensitive to the partial pressure of oxygen used in sample preparation. A sample prepared in ai…
We extend previous work on alkali halides by calculations for the heavy-atom species RbF, RbCl, LiBr, NaBr, KBr, RbBr, LiI, NaI, KI, and RbI. Relativistic effects are included by means of energy-consistent pseudopotentials, correlations are treated at the coupled-cluster level. A striking deficiency of the Hartree-Foc…
We present a density functional study of the structural and electronic properties of small Cu_n (n=1,4) aggregates on defect-free MgO(100). The calculations employ a slab geometry with periodic boundary conditions, supercells with up to 76 atoms, and include full relaxation of the surface layer and of all adsorbed ato…
The engineering of functional smooth muscle (SM) tissue is critical if one hopes to successfully replace the large number of tissues containing an SM component with engineered equivalents. This study reports on the effects of SM cell (SMC) seeding and culture conditions on the cellularity and composition of SM tissues…
A boron-doped hydrogenated amorphous diamondlike carbon (a-DLC:H) was prepared using a mercury-sensitized photochemical vapor deposition (photo-CVD) method. The source gases were B2H6 and C2H4. By increasing the boron doping ratio (B2H6/C2H4) from 0 to 12 000 ppm, the dark conductivity increased from ∼10−9 to ∼10−7 S/…
Transient photocurrents are investigated in ferroelectric lead zirconate titanate (PZT) films illuminated by laser pulses in the spectral range of 340–380 nm. At low electric fields, the photocurrent is sensitive to the ferroelectric polarization state and changes sign upon the polarization switching. At higher fields…
The α-Fe/R2Fe14B-type exchange-coupled NdFeB nanocomposites with a coercivity (iHc) of more than 11 kOe and energy product, (BH)max, of more than 16 MGOe have been successfully obtained on melt spun (Nd0.95La0.05)7.5+xFebalCr2B10 alloy powders, where x ranged from 3 to 3.5. It was found that a slight substitution of C…