Valeri Petkov、Simon J. L. Billinge、Joy Heising 等 4 位作者2000-11-01Journal of the American Chemical Society
The three-dimensional structure of metastable exfoliated-restacked WS 2 (r-WS 2 ) has been determined by the atomic pair distribution function (PDF) technique. We show that the structure of r-WS 2 is not a random turbostratic assembly of layers, as previously thought, but it can be better regarded as a monoclinic stru…
Nuclear Materials and PropertiesMachine Learning in Materials ScienceX-ray Diffraction in Crystallography
María L. Arnal、Alejandro J. Müller、Pralay Maiti 等 4 位作者2000-11-01Macromolecular Chemistry and Physics
In this work, isotactic poly(propylene) (iPP) was finely dispersed in immiscible atactic polystyrene (PS) matrices. When the dispersion obtained is fine enough (droplet size of approximately 1–2 μm), the iPP crystallizes in a fractionated fashion at temperatures between 104 and 42°C. By applying a self-nucleation proc…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Rabah Boukherroub、Sylvie Morin、D. D. M. Wayner 等 4 位作者2000-11-01physica status solidi (a)
This paper describes photoluminescence (PL) stabilization through chemical modification of freshly prepared porous silicon (PSi) surfaces. As-anodized PSi surfaces react with 1-alkenes, non-conjugated dienes and aldehydes at elevated temperatures to form organic monolayers covalently bonded to the surface. This therma…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
René van Roij、Marjolein Dijkstra、Robert Evans2000-11-01The Journal of Chemical Physics
We investigate interfacial and capillary phenomena in a simple model for a fluid of hard rods, viz. the Zwanzig model, in which the orientations of rectangular blocks are restricted to three orthogonal directions. The theory, which is based on an Onsager-like free energy functional, predicts local biaxial ordering at…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesTheoretical and Computational Physics
A. D. Dinsmore、David S. Y. Hsu、S. B. Qadri 等 7 位作者2000-11-01Journal of Applied Physics
Structural and light-emitting properties of nanoparticles of ZnS:Mn annealed in vacuum at temperatures up to 525 °C are presented. Annealing the 3.5 nm particles at temperatures up to 350 °C caused growth of some particles without substantial change in the luminescence or ZnS lattice. After annealing at 400–525 °C, th…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanocluster Synthesis and Applications
Leigh Canham、Michael Stewart、Jillian M. Buriak 等 8 位作者2000-11-01physica status solidi (a)
The stability of derivatized mesoporous silicon mirrors in simulated human blood plasma has been assessed. The rate at which they are dissolved in-vivo is predicted to be tunable by surface chemistry over timescales of weeks to years, and high reflectivity can be maintained until the bottom of the multilayer stack sta…
Laser Material Processing TechniquesSilicon Nanostructures and PhotoluminescenceAnalytical Chemistry and Sensors
Antonio Mayne、S. C. Bayliss、P. Barr 等 5 位作者2000-11-01physica status solidi (a)
PS has been shown to be an excellent candidate biomaterial following studies showing its biostability and non-toxicity. These favourable properties, coupled with the ease of its topographical manipulation, and its optoelectronic properties, make it an ideal material for the design of biologically interfaced devices (B…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsNeuroscience and Neural Engineering
Olaf Hinrichsen、T. Genger、Martin Muhler2000-11-01Chemical Engineering & Technology
Manufacturing ceramic powders and compacts by pyrolizing organosilicon polymers results in an amorphous microporous Si-O-C matrix with favorable high temperature strength and chemical stability compared to conventional porous organic matrices. Using this method the authors present the production of defect-free ceramic…
Metal-Organic Frameworks: Synthesis and ApplicationsCatalytic Processes in Materials ScienceMesoporous Materials and Catalysis
Theo A. Tervoort、Leon E. Govaert2000-11-01Journal of Rheology
This paper presents an experimental characterization of the three-dimensional strain-hardening response of polycarbonate in the glassy state. Using a special mechanical conditioning technique, large homogeneous deformations were obtained in tension, compression, and shear. The experimental results are compared to a nu…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesRheology and Fluid Dynamics Studies
David L. Young、T. J. Coutts、V. Kaydanov 等 5 位作者2000-11-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
The Boltzmann transport equation can be solved to give analytical solutions to the resistivity, Hall, Seebeck, and Nernst coefficients. These solutions may be solved simultaneously to give the density-of-states effective mass (md*), the Fermi energy relative to either the conduction or valence band, and a scattering p…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Zenji Horita、M. Furukawa、M. Nemoto 等 4 位作者2000-11-01Materials Science and Technology
Severe plastic deformation provides a processing tool for introducing fine grain sizes into polycrystalline materials. This paper describes the principles of equal channel angular pressing (ECAP) in which a material is pressed through a die where two channels form an L shaped configuration. The process of ECAP imposes…
Microstructure and mechanical propertiesMetal Forming Simulation TechniquesMetallurgy and Material Forming
Hiroyuki Furuta、Naoko Kubo、Hiromitsu Maeda 等 7 位作者2000-11-01Inorganic Chemistry
An inner-coordinated Pd complex and inner- and outer-N coordinated, double-decker Pd complexes of N-confused tetratolylporphyrin have been synthesized, and their structures were elucidated by X-ray single-crystal analyses.
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Luke M. Rice、Thomas Earnest、Axel T. Brünger2000-11-01Acta Crystallographica Section D Biological Crystallography
Multiwavelength anomalous diffraction (MAD) phasing has become a routinely used tool for determining new macromolecular structures. The MAD method has stringent data-collection requirements, typically necessitating radiation-resistant crystals and access to a tunable synchrotron beamline. In cases where synchrotron ti…
Protein Structure and DynamicsEnzyme Structure and FunctionPorphyrin Metabolism and Disorders
Ji‐Guang Li、Takayasu Ikegami、Jong‐Heun Lee 等 4 位作者2000-11-01Journal of the American Ceramic Society
A precursor for magnesium aluminum spinel powder, composed of crystalline ammonium dawsonite hydrate (NH 4 Al(OH) 2 CO 3 ·H 2 O) and hydrotalcite (Mg 6 Al 2 (CO 3 )(OH) 16 ·4H 2 O) phases, was synthesized via precipitation, using ammonium bicarbonate as the precipitant. The precursor was characterized by differential…
Advanced ceramic materials synthesisLayered Double Hydroxides Synthesis and ApplicationsMagnesium Oxide Properties and Applications
Min Zheng、L. Menon、Hao Zeng 等 7 位作者2000-11-01Physical review. B, Condensed matter
Magnetic properties of Ni nanowires electrodeposited into self-assembled porous alumina arrays have been investigated. By anodizing aluminum in sulfuric acid and immersing the as-anodized template into phosphoric acid for different lengths of time, we are able to vary the diameters of the subsequently deposited nanowi…
Magnetic properties of thin filmsAnodic Oxide Films and NanostructuresNanoporous metals and alloys
Jessica S Hayes、R. Keyte、P.B. Prangnell2000-11-01Materials Science and Technology
Equal channel angular extrusion has been used to deform an Al–3 wt-%Mg alloy to an effective strain of 10, resulting in a 0.2 µm grain size. In the as deformed condition the yield strength was increased to ∼500 MPa. During annealing the grain structure coarsened uniformly and the yield stress was found to follow the H…
Microstructure and mechanical propertiesMetal Forming Simulation TechniquesMetallurgy and Material Forming
P Scheidler、W Kob、K Binder2000-11-01Europhysics Letters (EPL)
We use molecular dynamics computer simulations to investigate the relaxation dynamics of a binary Lennard-Jones liquid confined in a narrow pore. We find that this dynamics is strongly influenced by the confinement in that time correlation functions are much more stretched than in the bulk. By investigating the motion…
Material Dynamics and PropertiesAdvanced Physical and Chemical Molecular InteractionsChemical and Physical Properties of Materials
Bhadra P. Pokharel、Dhananjai Pandey2000-11-01Journal of Applied Physics
Phase transitions in semiwet derived (Pb1−xBax)ZrO3 ceramics for the composition range 0⩽x⩽0.30 have been investigated by dielectric measurements at various frequencies during heating and cooling cycles. The paraelectric (PE) to ferroelectric (FE) to antiferroelectric (AFE) sequence of phase transitions is observed fo…
Ferroelectric and Piezoelectric MaterialsMaterial Dynamics and PropertiesGlass properties and applications
David S. Horner、Peter G. Foster、T. Martin Embley2000-11-01Molecular Biology and Evolution
Hydrogenases, oxygen-sensitive enzymes that can make hydrogen gas, are key to the function of hydrogen-producing organelles (hydrogenosomes), which occur in anaerobic protozoa scattered throughout the eukaryotic tree. Hydrogenases also play a central role in the hydrogen and syntrophic hypotheses for eukaryogenesis. H…
Hydrogen Storage and MaterialsHybrid Renewable Energy SystemsParasitic Infections and Diagnostics
Siddharth Gautam、Sudhakar Balijepalli、Gregory C. Rutledge2000-11-01Macromolecules
Semicrystalline polymers exhibit metastable interphases, which must simultaneously accommodate molecular connectivity and disorder across the interlamellar phase. Off-lattice molecular simulations, previously used to study the {001} interphase in freely rotating chains, are used here to study the interlamellar phases…
Polymer crystallization and propertiesMaterial Dynamics and PropertiesBlock Copolymer Self-Assembly