Ranjit T. Koodali、Kenneth J. Klabunde2004-12-13Chemistry of Materials
The hydrolysis of magnesium methoxide in various solvent−methanol mixtures with a water-to-methoxide ratio of 2 has been studied. Solvents having low dielectric constants such as toluene, benzene, and anisole were found to accelerate the gelation process, while solvents having high dielectric constants such as acetoni…
Aerogels and thermal insulationMesoporous Materials and CatalysisMagnesium Oxide Properties and Applications
Shin‐ichi Ohkoshi、Tomoyuki Matsuda、Hiroko Tokoro 等 4 位作者2004-12-13Chemistry of Materials
A series of Rb x Mn[Fe(CN) 6 ] ( x +2)/3 · z H 2 O compounds ( x = 0.94 ( 1 ), x = 0.85 ( 2 ), and x = 0.73 ( 3 )) showed a temperature-induced phase transition with a thermal hysteresis loop, which is caused by the charge transfer from Mn II to Fe III and a Jahn−Teller distortion of the produced Mn III . The transiti…
Organic and Molecular Conductors ResearchMagnetism in coordination complexesInorganic Chemistry and Materials
János Szanyi、Ja Hun Kwak、Do Heui Kim 等 5 位作者2004-12-13The Journal of Physical Chemistry B
Temperature programmed desorption, infrared spectroscopy, and (15)N solid state NMR spectroscopy were used to characterize the nature of the nitrate species formed on Al(2)O(3) and BaO/Al(2)O(3) NO(x) storage/reduction materials. Two distinctly different nitrate species were found: surface nitrates that are associated…
Ammonia Synthesis and Nitrogen ReductionInorganic Chemistry and MaterialsCatalytic Processes in Materials Science
Yeonhwan Jeong、Kenji Hanabusa、Hiroyasu Masunaga 等 7 位作者2004-12-13Langmuir
An organogel system consisting of trans-(1S,2S)-bis(ureidododecyl)cyclohexane (SS-BUC) and a series of primary alcohols was explored with optical polarizing microscopy (OPM), electron microscopy, circular dichroism (CD), wide-angle X-ray scattering (WAXS), and synchrotron small-angle X-ray scattering (SAXS). OPM, SAXS…
Polydiacetylene-based materials and applicationsSupramolecular Self-Assembly in MaterialsLuminescence and Fluorescent Materials
Aron Walsh、Graeme W. Watson2004-12-13Physical Review B
Density functional theory calculations have been performed on SnO in the litharge, herzenbergite, and rocksalt crystal structures. An asymmetric electron distribution was found around the Sn atoms in litharge and herzenbergite SnO which could be ascribed to a $\mathrm{Sn}\phantom{\rule{0.3em}{0ex}}5{s}^{2}$ sterically…
Electronic and Structural Properties of OxidesZnO doping and propertiesGas Sensing Nanomaterials and Sensors
Oksana Olkhovyk、Mietek Jaroniec2004-12-13Journal of the American Chemical Society
Periodic mesoporous organosilica with a heterocyclic bridging group of large molecular weight, tris[3-(trimethoxysilyl)propyl]isocyanurate, is reported. Incorporation of an organic moiety into the silica framework afforded material attractive for adsorption of mercury and related heavy metal ions from aqueous solution…
Polyoxometalates: Synthesis and ApplicationsMesoporous Materials and CatalysisMetal-Organic Frameworks: Synthesis and Applications
Pulok Pattanayak、S. Asokan2004-12-13Journal of Applied Physics
Temperature modulated alternating differential scanning calorimetric studies show that Se rich Ge0.15Se0.85−xAgx (0⩽x⩽0.20) glasses are microscopically phase separated, containing Ag2Se phases embedded in a Ge0.15Se0.85 backbone. With increasing silver concentration, Ag2Se phase percolates in the Ge–Se matrix, with a…
Semiconductor materials and interfacesPhase-change materials and chalcogenidesChemical and Physical Properties of Materials
M. Ausloos、M. Pekala、J. Latuch 等 7 位作者2004-12-13arXiv
Loosely packed granular materials are intensively studied nowadays. Electrical and thermal transport properties should reflect the granular structure as well as intrinsic properties. We have compacted crystalline $CaAl$ based metallic grains and studied the electrical resistivity and the thermoelectric power as a func…
Materials Science
Arlette R. C. Baljon、Joris Billen、Rajesh Khare2004-12-13Physical Review Letters
We present an analysis of heterogeneous dynamics in molecular dynamics simulations of a polymeric film supported by an absorbing surface. Using a bead-spring model for polymers, we show that slow, immobile beads occur throughout the film, with the probability of their occurrence decreasing with distance from the subst…
Rheology and Fluid Dynamics StudiesTheoretical and Computational PhysicsMaterial Dynamics and Properties
C. Schroeder、H. Nojiri、J. Schnack 等 6 位作者2004-12-13arXiv
We have found a class of zero-dimensional geometrically frustrated Heisenberg spin systems exhibiting anomalous behavior in an external magnetic field B similar to that occuring in geometrically frustrated planar antiferromagnetic lattices. Our calculations for both the classical and quantum isotropic Heisenberg model…
Materials Science
Haoran Zhang、Qingbiao Li、Yinghua Lu 等 8 位作者2004-12-13Journal of Chemical Technology & Biotechnology
Abstract Corynebacterium strain SH09 separated from a silver mine was used for biosorption and bioreduction of diamine silver complex. The biosorption of the diamine silver complex was better than that of silver ions and the maximum of the former was about 350 (mg Ag) (g dried biomass) −1 . After dried cells of SH09 w…
Nanoparticles: synthesis and applicationsNanomaterials for catalytic reactionsGraphene and Nanomaterials Applications
Jae Hee Song、Franklin Kim、Daniel Kim 等 4 位作者2004-12-13Chemistry - A European Journal
Electrochemically prepared Au nanorods were used as seeds for the overgrowth of thin shells of gold, silver, and palladium by using a mild reducing agent, ascorbic acid, in the presence of surfactants at ambient condition. The unique crystal facets of the starting nanorods results in anisotropic crystal overgrowth. Th…
Electrochemical Analysis and ApplicationsGold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And Properties
Seong‐Min Choi、Hideo Awaji2004-12-13Science and Technology of Advanced Materials
Ceramic-based nanocomposites were reviewed, emphasizing the newly developed concept of material design for ceramics. First, characteristics of the nanocomposites observed by previous researchers were summarized as, significant or moderate improvement in strength, drastic change of the fracture mode from intergranular…
Advanced materials and compositesEnergetic Materials and CombustionAdvanced ceramic materials synthesis
Norma Negrete Herrera、Jean-Marie Létoffé、J.P. Reymond 等 4 位作者2004-12-13Journal of Materials Chemistry
We report in this work the grafting of laponite clay particles with monofunctional γ-methacryloxypropyl dimethyl methoxy silane (γ-MPTDES) and trifunctional γ-methacryloxypropyl trimethoxy silane (γ-MPTMS) coupling agents. The evolution of the grafted amount and of the grafting yield was monitored as a function of the…
Hydrogels: synthesis, properties, applicationsPolymer Nanocomposites and PropertiesClay minerals and soil interactions
J. P. Huang、K. W. Yu2004-12-13arXiv
We exploit theoretically a magneto-controlled nonlinear optical material which contains ferromagnetic nanoparticles with a non-magnetic metallic nonlinear shell in a host fluid. Such an optical material can have anisotropic linear and nonlinear optical properties and a giant enhancement of nonlinearity, as well as an…
Materials ScienceSoft Condensed Matterphysics.optics
Kikuo Harigaya2004-12-13arXiv
Electronic structures and optical excitations in Moebius conjugated polymers are studied theoretically. Periodic and Moebius boundary conditions are applied to the tight binding model of poly(para-phenylene), taking exciton effects into account. We discuss that oligomers with a few structural units are more effective…
Strongly Correlated ElectronsChemical Physicsquant-phMaterials Science
Sharan Shetty、Sourav Pal、Dilip G. Kanhere 等 4 位作者2004-12-13arXiv
We have performed ab initio molecular dynamics simulations to study the nature of the synchronous double proton transfer in formic acid dimer. In order to understand the evolution of the bonding during the double proton transfer, we have used the electron localization function and the molecular orbital isosurfaces. Du…
Materials Science
I. Makkonen、M. Hakala、M. J. Puska2004-12-13arXiv
We present valence electron Compton profiles calculated within the density-functional theory using the all-electron full-potential projector augmented-wave method (PAW). Our results for covalent (Si), metallic (Li, Al) and hydrogen-bonded ((H_2O)_2) systems agree well with experiments and computational results obtaine…
Materials Science
Daniel J. Lacks、Mark Osborne2004-12-13Physical Review Letters
Molecular simulations and an energy landscape analysis are used to investigate the effects of shear on aging in a glass. Shear beyond the yield point is shown to change the state of a glass such that it resembles (but is not identical to) a different stage in the aging process. A cycle of large strain rejuvenates the…
Material Dynamics and PropertiesGlass properties and applicationsMetallic Glasses and Amorphous Alloys
Rongjie Song、Dirk Ponge、Dierk Raabe 等 4 位作者2004-12-13OpenAlex
The evolution of microstructure and texture of a 0.2%C–Mn steel during large strain warm deformation and subsequent annealing has been investigated. The process of grain subdivision during warm deformation is essential for the formation of ultrafine grains in such a material. The study reveals that pronounced recovery…
Magnetic Properties and ApplicationsMicrostructure and Mechanical Properties of SteelsMicrostructure and mechanical properties