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Facile Synthesis and Characterization of New β‐Diketonate Silver Complexes. Single‐Crystal Structures of (1,1,1,5,5,5‐Hexafluoro‐2,4‐pentadionato)(2,2′‐bipyridine)silver(I) and (1,1,1,5,5,5‐Hexafluoro‐2,4‐pentadionato)(N,N,N′,N′‐tetramethylethylenediamine)silver(I) and Their Use as MOCVD Precursors for Silver Films

Livio Zanotto、F. Benetollo、Marco Natali 等 7 位作者2004-08-01Chemical Vapor Deposition

Abstract Thin film depositions of metallic silver were performed using metal–organic (MO) CVD on glass substrates using, as precursors, the two new compounds (1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedionato)(2,2′‐bipyridine)silver( I ), [Ag(hfac)(bipy)] ( 1 ), and (1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedionato)( N , N , N ′, N…

Metal complexes synthesis and propertiesBlock Copolymer Self-AssemblyCopper Interconnects and Reliability

Synthesis and Characterization of a New Fluorescent Zwitterionic Spirocyclic Meisenheimer Complex of 1,3,5‐Trinitrobenzene

Rabih O. Al‐Kaysi、Gonzalo Guirado、E. Valente2004-08-01European Journal of Organic Chemistry

Abstract In this communication we present the first stable zwitterionic spirocyclic Meisenheimer compound based on an N→N rearrangement in the reaction between picric acid and diisopropylcarbodiimide. The structure was confirmed by single‐crystal X‐ray diffraction. Furthermore, this compound exhibits interesting fluor…

DNA and Nucleic Acid ChemistryLuminescence and Fluorescent Materials

Self‐Limited Pore Size Reduction of Mesoporous Silica Membranes via Pyridine‐Catalyzed Silicon Dioxide ALD

Ben McCool、William J. DeSisto2004-08-01Chemical Vapor Deposition

The pore size of mesoporous silica membranes is reduced using pyridine‐catalyzed SiO 2 ALD within the mesoporous matrix. The use of pyridine to catalyze the ALD results in lowering the reaction temperature to 80 °C. It also self‐limits the pore size reduction as shown in gas permeation experiments. The self‐limiting a…

Supercapacitor Materials and FabricationMesoporous Materials and CatalysisMembrane Separation and Gas Transport

Dielectric Properties of Frequency Modulation Twisted Nematic LCDs Doped with Palladium (Pd) Nanoparticles

Hiroyuki Shiraki、Sudarshan Kundu、Yoshio Sakai 等 7 位作者2004-08-01Japanese Journal of Applied Physics

Twisted nematic liquid crystal display (TN-LCD) devices, composed of nematic liquid crystal (NLC), doped with palladium (Pd) nanoparticles, which are protected with the same NLC molecules of 5CB (Merck, K-15), show electrooptic characteristics that are featured by a frequency modulation and fast response. This device…

Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern FormationSemiconductor Lasers and Optical Devices

The wet corrosion of molybdenum thin film –. Part I: Behavior at 25°C

L. De Rosa、C.R. Tomachuk、J. Špringer 等 6 位作者2004-08-01Materials and Corrosion

Abstract The corrosion and passivation behaviour of molybdenum thin films obtained by Physical Vapor Deposition (PVD) was investigated in aerated chloride and sulfate solutions at different pH values. Open circuit potential (ocp) measurements, polarisation experiments and electrochemical impedance spectroscopy (EIS) w…

Corrosion Behavior and InhibitionHigh-Temperature Coating BehaviorsHydrogen embrittlement and corrosion behaviors in metals

Preparation and characterization of CeMnO composites with applications in catalytic wet oxidation processes

Ginesa Blanco、M.A. Cauqui、Juan J. Delgado 等 6 位作者2004-08-01Surface and Interface Analysis

Abstract A series of CeMn composites with different compositions was prepared by co‐precipitation. All samples were characterized by x‐ray diffraction (XRD), x‐ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). According to their size and chemical co…

Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsElectronic and Structural Properties of Oxides

Excited-State Energy Flow in Covalently Linked Multiporphyrin Arrays: The Essential Contribution of Energy Transfer between Nonadjacent Chromophores

Eve Hindin、Robert A. Forties、Robert S. Loewe 等 9 位作者2004-08-01The Journal of Physical Chemistry B

A series of multiporphyrin arrays has been studied to probe the contribution of energy transfer between second-neighbor (“nonadjacent”) porphyrins and to determine the rate of energy transfer between identical porphyrins at adjacent sites. The arrays, organized in linear or branched architectures, contain up to 21 con…

Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials

Structure and stability of possible new alanates

Ole Martin Løvvik、Ole Swang2004-08-01Europhysics Letters (EPL)

Three new stable bialkalimetallic alanates are predicted by accurate density functional calculations: K 2 LiAlH 6 , K 2 NaAlH 6 , and KNa 2 AlH 6 . Their detailed crystal structure has been determined by a systematic search through a large part of the probable space of crystal structures. They are thermodynamically st…

Hydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen ReductionSuperconductivity in MgB2 and Alloys

Time-resolved space charge and electroluminescence measurements in polyethylene under ac stress

C. Laurent、G. Teyssèdre、G.C. Montanari2004-08-01IEEE Transactions on Dielectrics and Electrical Insulation

Time-resolved space charge (SC) and electroluminescence (EL) measurements are carried out on polyethylene films stressed under ac voltage at industrial frequency to probe injection, trapping and recombination of charge. SC is measured by pulsed electro-acoustic (PEA) technique at each zero voltage cross-over point of…

High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationElectrostatic Discharge in Electronics

Strain‐Controlled Tensile Deformation Behavior and Relaxation Properties of Isotactic Poly(1‐butene) and Its Ethylene Copolymers

Mahmoud Al‐Hussein、G. Strobl2004-08-01Macromolecular Symposia

Abstract The tensile deformation behaviour of poly(1‐butene) and two of its ethylene copoloymers was studied at room temperature. This was done by investigating true stress‐strain curves at constant strain rates, elastic recovery and stress relaxation properties and in‐situ WAXS patterns during the deformation process…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

BASF restores Red pigment production

作者信息未提供2004-08-01Additives for Polymers

Li-air battery (LAB), the energy-storage technology with highest theoretical energy density, is still seriously challenged by poor energy efficiency and limited durability though plenty of progresses have been made. In this work, we demonstrate that high performance LAB operated in N2-O2 (78:22) atmosphere could be ac…

Electrochemical sensors and biosensorsConducting polymers and applicationsAdvanced Nanomaterials in Catalysis

Eddy Current Measurements of Corrosion and Metal Loss in Zircaloy Cladding with Ferromagnetic Crud

Suresh Yagnik、Duane P. Johnson、John A. Kervinen2004-08-01Nuclear Technology

The routine method of monitoring Zircaloy cladding corrosion in nuclear fuel pools is based on eddy current (EC) measurements at a single high frequency in the range of 1-3 MHz. At this frequency the rf wave does not penetrate through the cladding wall and, ideally, the EC response can be correlated to the thickness o…

Fusion materials and technologiesMetallurgical Processes and ThermodynamicsNuclear Materials and Properties

The nature and mechanism of charging of electron traps in Lu2SiO5:Ce3+ crystals

N. V. Znamenskiı̆、É. A. Manykin、E. A. Petrenko 等 9 位作者2004-08-01Journal of Experimental and Theoretical Physics

Investigation of the thermoluminescence (TL) properties depending on the temperature, UV irradiation dose, and activator ion concentration in Lu 2 SiO 5 :Ce 3+ (LSO:Ce) crystals and measurements of the decay of recombination radiation during photostimulated release of the excitation energy accumulated in these crystal…

Luminescence Properties of Advanced MaterialsRadiation Detection and Scintillator TechnologiesNuclear materials and radiation effects

La(Sr)FeO 3 SOFC Cathodes with Marginal Copper Doping

Steven P. Simner、Marc A. Anderson、Jeffry W. Stevenson2004-08-01Journal of the American Ceramic Society

(La 0.8 Sr 0.2 ) 0.98 Fe 0.98 Cu 0.02 O 3−δ can be sintered directly onto YSZ (without the need for a protective ceria interlayer). Though subject to an extended “burn‐in” period (∼200 h), anode‐supported YSZ cells using the Cu‐doped LSF achieve power densities ranging from 1.3 to 1.7 W/cm 2 at 750°C and 0.7 V. These…

Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsElectronic and Structural Properties of Oxides

Radiation monitoring with diamond sensors in BABAR

A. J. Edwards、B. Brau、M. Bruinsma 等 9 位作者2004-08-01IEEE Transactions on Nuclear Science

In order to safeguard the silicon vertex tracker in the BABAR detector from excessive radiation damage, cumulative dose and instantaneous dose rates are continuously monitored. As an upgrade to the current radiation monitoring system, which uses silicon p-i-n diodes, we are examining the possible use of single-crystal…

High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchAdvanced X-ray and CT Imaging

Polymerization of aniline in the channels of micro‐ and mesoporous materials

Francisco Márquez、R. Roque‐Malherbe、Jorgé Duconge 等 4 位作者2004-08-01Surface and Interface Analysis

Abstract Preparation of conducting polymers incorporated within porous materials, that is, zeolites and mesoporous materials, is an attractive methodology to obtain composite materials where the organic polymer may exhibit an increased mechanical and chemical performance compared to the pure polymer. For any applicati…

Conducting polymers and applicationsMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications

Red-Emitting Phosphor Particles with Spherical Shape, Dense Morphology, and High Luminescent Efficiency under Ultraviolet

Yun Chan Kang、Hyun Sook Roh、Seung Bin Park 等 4 位作者2004-08-01Japanese Journal of Applied Physics

Gd 2 O 3 :Eu phosphor particles of spherical shape, filled morphology, and high brightness were prepared by large-scale spray pyrolysis. The morphology control of Gd 2 O 3 :Eu particles was attempted by adding organic precursors in a spray solution. The influence of chain length of organic additives and introduction o…

Advanced Photocatalysis TechniquesLuminescence Properties of Advanced MaterialsNuclear materials and radiation effects

Characterization of Internal Pores in Hydrothermally Synthesized BaTiO 3 Particle by Transmission Electron Microscopy

Hiromi Nakano、Kazuyori Urabe、Tetsuo Oikawa 等 4 位作者2004-08-01Journal of the American Ceramic Society

Hydrothermally synthesized barium titanate, BaTiO 3 (commercially available), has internal pores in small particles. The three‐dimensional structures of the pores were successfully observed using transmission electron microscopy (TEM) and reconstructed by a tomography system. The behavior of the internal pore is obser…

Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Combined use of XPS and SEM + EDS for the study of surface microchemical structure of archaeological bronze Roman mirrors

G. M. Ingo、Emma Paola Maria Virginia Angelini、T. de Caro 等 5 位作者2004-08-01Surface and Interface Analysis

Abstract By means of the combined use of XPS and scanning electron microscopy + energy dispersive spectrometry (SEM + EDS) the study of the surface microchemical structure of two archaeological Roman mirrors is carried out in order to obtain useful information to identify the ancient production technology, the degrada…

Corrosion Behavior and InhibitionCultural Heritage Materials AnalysisElectron and X-Ray Spectroscopy Techniques