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Synthesis, Structure, and Magnetic Properties of Cs2-xRbxCu3P4O14 (0.0 ≤ x ≤ 0.8): A New Series of Copper(II) Phosphates Containing Periodic Arrays of Staggered Square-Planar CuO4 Trimers

Kulugammana G. S. Ranmohotti、Xunhua Mo、M.K. Smith 等 4 位作者2006-04-06Inorganic Chemistry

In our continued exploratory synthesis of compounds containing transition-metal oxide magnetic nanostructures, a new copper(II) phosphate phase, Cs2Cu3P4O14 (1), was isolated employing the mixed CsCl/2CsI molten flux. The X-ray single-crystal structural analysis shows that the Cs2Cu3P4O(14) phase crystallizes in a mon…

Magnetism in coordination complexesCrystal Structures and PropertiesPolyoxometalates: Synthesis and Applications

Domain Memory of Mixed Polymer Brushes

Svetlana Santer、Alexey Kopyshev、Jörn Donges 等 5 位作者2006-04-06Langmuir

The nano-phase-separation in mixed polymer brushes consisting of polystyrene and poly(methyl methacrylate) (PS-PMMA) chains attached to a silicon surface is studied. The topographies of the mixed brushes are examined after they have been exposed to solvents which induce or erase nano-phase-separation. It is discussed…

Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsNanofabrication and Lithography Techniques

Controlled Assembly of a Heterogeneous Single‐Site Ethylene Trimerization Catalyst as Probed by X‐ray Absorption Spectroscopy

Cristina N. Nenu、Joost N. J. van Lingen、Frank M. F. de Groot 等 5 位作者2006-04-06Chemistry - A European Journal

X-ray absorption spectroscopy at the Cr K- and L(2,3)-edges was used to study the assembling process of a heterogeneous Cr-based single-site catalyst. The starting point was a Phillips-type system with monochromate species anchored on a silica surface, which was first reduced to a variety of different surface Cr(II) s…

Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceMolecular Junctions and Nanostructures

Novel One‐Step Synthesis of Porous‐Supported Catalysts by Activated‐Carbon Templating

Jesús Blanco、Alice L. Petre、M. Yates 等 6 位作者2006-04-06Advanced Materials

A new, simple, versatile, and easily scaleable one-step preparation method – an impregnated carbon procedure (ICP) – is proposed to produce highly dispersed active phases on supports of tailored porosity (see scheme; AC: activated carbon). This one-step synthesis unites simplicity of preparation with outstanding prope…

Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisMesoporous Materials and Catalysis

Overview of the preparation of pure polyaniline and conductive composites in dispersed media and by thermal processes: from laboratory to semi‐industrial scale

Nicolas Kohut‐Svelko、Frédéric Dinant、Sylvain Magana 等 7 位作者2006-04-06Polymer International

Abstract Intrinsically conductive polymers (ICPs) and conductive composites offer many potential industrial applications due to their conductive properties, processability and mechanical properties. Much work has been carried out to develop the synthesis and formulation of various conductive polymers. Nevertheless, po…

Electrochemical sensors and biosensorsConducting polymers and applicationsElectrochemical Analysis and Applications

Impact of crystallization statistics on data retention for phase change memories

Andrea Redaelli、Daniele Ielmini、Andrea L. Lacaita 等 6 位作者2006-04-06OpenAlex

The stochastic nature of percolation is shown as a possible issue for retention in PCM devices, due to the occurrence of unlikely crystallization events that early decrease the device resistance. Failure time dispersions at high temperatures are measured and analyzed through a crystallization Monte Carlo model. A phys…

Semiconductor materials and devicesAdvanced Memory and Neural ComputingPhase-change materials and chalcogenides

Performance of carbon nanotube field effect transistors with doped source and drain extensions and arbitrary geometry

Gianluca Fiori、Giuseppe Iannaccone、Gerhard Klimeck2006-04-06OpenAlex

In this work, we investigate the expected device performance and the scaling perspectives of carbon nanotube field effect transistors (CNT-FETs), with doped source and drain extensions, by means of a novel three-dimensional NEGF-based simulation tool capable of considering arbitrary gate geometry and device architectu…

Carbon Nanotubes in CompositesGraphene research and applicationsAdvancements in Semiconductor Devices and Circuit Design

Influence of Charging Parameters on Piezoelectricity for Cellular Polypropylene Film Electrets

Peng-Feng Zhang、Zhongfu Xia、Xunlin Qiu 等 5 位作者2006-04-06OpenAlex

The influences of charging parameters (such as charging voltage, charging time and charging temperature, etc.) on piezoelectricity and its thermal stability of cellular polypropylene film electrets were studied by means of contact charging, constant voltage corona charging methods and the thermal stimulated discharge…

Advanced Sensor and Energy Harvesting MaterialsHigh voltage insulation and dielectric phenomenaDielectric materials and actuators

Nonlinear oscillatory convection in mushy layers

Peter Guba、M. Grae Worster2006-04-06Journal of Fluid Mechanics

We study the problem of nonlinear development of oscillatory convective instability in a two-dimensional mushy layer during solidification of a binary mixture. We adopt the near-eutectic limit, making the problem analytically tractable using standard perturbation techniques. We consider also a distinguished limit of l…

Theoretical and Computational PhysicsSolidification and crystal growth phenomenaFluid Dynamics and Thin Films

Liquid Nanodroplets Spreading on Chemically Patterned Surfaces

Gary S. Grest、David R. Heine、Edmund B. Webb2006-04-06Langmuir

Controlling the spatial distribution of liquid droplets on surfaces via surface energy patterning can be used to deliver material to specified regions via selective liquid/solid wetting. Although studies of the equilibrium shape of liquid droplets on heterogeneous substrates exist, much less is known about the corresp…

Surface Modification and SuperhydrophobicityPickering emulsions and particle stabilizationFluid Dynamics and Thin Films

A Crystal Modulating Protein from Molluscan Nacre That Limits the Growth of Calcite in Vitro

Il Won Kim、Sebastiano Collino、Daniel E. Morse 等 4 位作者2006-04-06Crystal Growth & Design

Protein-mediated biomineral formation and polymorph selection in the mollusk shell involves the participation of a number of different proteins. One of these proteins, AP7, has been identified as a participant in nacre (aragonite) formation in the mollusk Haliotis rufescens. However, the role(s) of this protein in ara…

Paleontology and Stratigraphy of FossilsCalcium Carbonate Crystallization and InhibitionMinerals Flotation and Separation Techniques

Analysis of Drying Kinetics and Moisture Distribution in Convective Textile Fabric Drying

Luiza Helena Costa Dutra Sousa、Oswaldo Curty da Motta Lima、Nehemias Curvelo Pereira2006-04-06Drying Technology

The drying process of crude cotton fabric is analyzed under two main aspects: analysis of moisture distribution inside the textile sheet, and analysis of certain operational convective drying process variables. Experimental apparatus consisted of a drying chamber in which samples of pure cotton textile were suspended…

Food Drying and ModelingDyeing and Modifying Textile FibersTextile materials and evaluations

Cathodoluminescence of SiOx under‐stoichiometric silica layers

Roushdey Salh、A. von Czarnowski、M. V. Zamoryanskaya 等 5 位作者2006-04-06physica status solidi (a)

Abstract Under‐stoichiometric thin silica layers SiO x with different stoichiometric degree 1 ≤ x ≤ 2, were prepared by thermal evaporation of silicon monoxide in vacuum and in ambient oxygen atmosphere of various pressure onto crystalline silicon substrates. The chemical composition has been determined by Fourier tra…

Carbon Nanotubes in CompositesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications

Electron correlation effects on the magnetostructural transition and magnetocaloric effect inGd5Si2Ge2

Durga Paudyal、V. K. Pecharsky、K. A. Gschneidner 等 4 位作者2006-04-06Physical Review B

Electron correlation effects on the electronic structure of ${\mathrm{Gd}}_{5}{\mathrm{Si}}_{2}{\mathrm{Ge}}_{2}$ have been studied using the tight binding linear muffin-tin orbital method within the framework of the local spin density approximation with the Coulomb correlation parameter approach. The magnetostructura…

Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics

Motional Heterogeneity of Intercalated Species in Modified Clays and Poly(ε-caprolactone)/Clay Nanocomposites

Laetitia Urbanczyk、Jana Hrobáriková、Cédric Calberg 等 5 位作者2006-04-06Langmuir

Modified laponites and synthetic saponites are used as precursors for the preparation of poly(epsilon-caprolactone) (PCL)/clay nanocomposites. The structure and dynamics of species intercalated in the modified clays and the corresponding nanocomposites are characterized by X-ray diffraction and magic-angle spinning NM…

Polymer Nanocomposites and PropertiesClay minerals and soil interactionsNMR spectroscopy and applications

Excellent resistance switching characteristics of Pt/SrTiO/sub 3/ schottky junction for multi-bit nonvolatile memory application

Hyunjun Sim、Hyejung Choi、Dongsoo Lee 等 11 位作者2006-04-06OpenAlex

We have investigated single crystal Nb-doped SrTiO3in terms of its potential utility in nonvolatile memory applications. Compared with polycrystalline oxide (Nb2O5, ZrOxand Cr-SrTiO3), the Pt/single crystal Nb:SrTiO3Schottky junction exhibits excellent memory characteristics including uniformity of set/reset bias, die…

Ferroelectric and Piezoelectric MaterialsAdvanced Memory and Neural ComputingElectronic and Structural Properties of Oxides

Density Functional Theory Study of Methanol Conversion via Cold Plasmas

You Han、Jianguo Wang、Dang‐guo Cheng 等 4 位作者2006-04-06Industrial & Engineering Chemistry Research

A density functional theory (DFT) study has been conducted in this work to investigate the mechanism of methanol conversion using cold plasmas. All pathways for initial methanol dissociation were analyzed. The feasibility of the production of various products, including hydrogen, carbon monoxide, and ethylene glycol (…

Advanced Chemical Physics StudiesCatalytic Processes in Materials SciencePlasma Applications and Diagnostics

The growth of concentration fluctuations in dilute dispersions of orientable and deformable particles under sedimentation

David Saintillan、Eric S. G. Shaqfeh、Eric Darve2006-04-06Journal of Fluid Mechanics

Theory and numerical simulations are used to investigate the concentration fluctuations and the microstructure in dilute sedimenting suspensions of orientable and deformable particles at zero Reynolds number. The case of orientable particles is studied using prolate and oblate spheroids, while viscous droplets in the…

Material Dynamics and PropertiesMicrofluidic and Bio-sensing TechnologiesElectrostatics and Colloid Interactions

Formation mechanism of surface relief structures on amorphous azopolymer films

Ke Yang、Suizhou Yang、Jayant Kumar2006-04-06Physical Review B

The electromagnetic force from two interfering light beams on isotropic materials is derived for surface relief grating formation processes. The Navier-Stokes equation is solved for the electromagnetic force induced motion inside the ``photoplasticized'' amorphous azopolymer film. The predicted inscription rates and s…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsOptical Polarization and Ellipsometry

Ferroelectric ordering in imidazolium perchlorate

Z. Pająk、P. Czarnecki、B. Szafrańska 等 5 位作者2006-04-06The Journal of Chemical Physics

Imidazolium perchlorate has been synthesized and studied over a wide range of temperatures by differential scanning calorimetry, x-ray diffraction, proton magnetic resonance, optical observation, and dielectric spectroscopy. Polymorphic solid-solid phase transitions have been disclosed at 487, 373, and 247 K. The crys…

Nonlinear Optical Materials ResearchAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography