Qinghua Ren、Zhida Chen、Jie Ren 等 6 位作者2002-05-24The Journal of Physical Chemistry A
The ferromagnetic coupling behavior in oxo-bridged bis(bis(cyclopentadienyl)titanium(III)) complex (Cp 2 Ti) 2 (μ-O) is investigated on the basis of calculations of density functional theory combined with the broken-symmetry approach. The magnetic coupling constants calculated for the experimental and optimized geomet…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesLanthanide and Transition Metal Complexes
H. Kothari、Alexey Vertegel、Eric W. Bohannan 等 4 位作者2002-05-24Chemistry of Materials
Superlattices in the Pb−Tl−O system with modulation wavelengths varying from 5.2 to 18.9 nm were epitaxially electrodeposited on single-crystal Au(100) by periodically pulsing the current anodically between 0.05 and 5 mA/cm 2 . The films were grown at room temperature from an aqueous solution of 0.005 M TlNO 3 and 0.1…
Quantum Dots Synthesis And PropertiesSemiconductor materials and devicesElectronic and Structural Properties of Oxides
Jian Ming Zhang、Dong Hui Zhang、De Yan Shen2002-05-24Macromolecules
Reflection−absorption infrared (RAIR) and surface-enhanced Raman scattering (SERS) spectroscopy were used to determine the orientation of the bulk and interface of a polymer thin film formed by atactic poly(methyl methacrylate) (a-PMMA) which was dip-coated onto a novel dual-sided substrate. The novel substrate with s…
Gold and Silver Nanoparticles Synthesis and ApplicationsMaterial Dynamics and PropertiesCultural Heritage Materials Analysis
Czesław Szmytkowski、Stanisław Kwitnewski2002-05-24Journal of Physics B Atomic Molecular and Optical Physics
Absolute total cross sections (TCSs) for the electron scattering from two structured isomers of C 3 H 6 (propene and cyclopropane) have been determined over the energy range from 0.5 up to 370 eV in a linear electron-beam transmission experiment. The TCS for propene is generally higher than that for cyclopropane, espe…
Advanced Chemical Physics StudiesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Qiang Fang、Xuemei Ding、Xiongying Wu 等 4 位作者2002-05-24Journal of Applied Polymer Science
Abstract A new chain‐extension modifier for bismaleimide (BMI), 2,6‐di‐(4‐aminophenoxy)benzonitrile (DAPB), was synthesized through nucleophilic substitution of 2,6‐dichlorobezonitrile by 4‐aminophenol using anhydrous sodium carbonate as an acid acceptor, toluene as a dehydrating agent, and N , N ′‐dimethylacetamide (…
Epoxy Resin Curing ProcessesInjection Molding Process and PropertiesSynthesis and properties of polymers
Xiangchun Xuan2002-05-24Semiconductor Science and Technology
We perform optimal designs of two applicable configurations of multistage thermoelectric (TE) coolers, with serial and separate electric currents flowing through each stage, respectively. The finite-rate heat transfers between the coolers and reservoirs are taken into account. A general optimization method is develope…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Radiation and Cooling Technologies
Bhanu Nandan、L. D. Kandpal、G. N. Mathur2002-05-24Journal of Polymer Science Part B Polymer Physics
Abstract The compatibility behavior of polyetherether ketone (PEEK) with poly(ether sulfone) (PES) has been reexamined using differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and extrudate swell measurements. The blends were prepared by both melt‐blending and solution‐blending techniques. Th…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Kuei‐Fang Hsu、Sangeeta Lal、Tim Hogan 等 4 位作者2002-05-24Chemical Communications
Two new thermoelectric materials of quaternary bismuth telluride CsPb3Bi3Te8 and CsPb4Bi3Te9 are reported, which are members of a homologous series featuring anionic slabs [PbmBi3Te5 + m]- (m = 1-4) of monotonically increasing thickness.
Advanced Thermoelectric Materials and DevicesCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Virginia G. DeGiorgi、Muhammad A. Qidwai2002-05-24Smart Materials and Structures
Computational techniques are used to estimate porous shape memory alloy material behavior in this study. Mesoscale analysis techniques based on a two-dimensional finite element method are used to evaluate a representative volume element (RVE) to determine effective material response. The porous shape memory alloy is d…
Cellular and Composite StructuresShape Memory Alloy TransformationsCalcium Carbonate Crystallization and Inhibition
G.F. Hermsen、B.A. de Geeter、Nico F. A. van der Vegt 等 4 位作者2002-05-24Macromolecules
We have studied conformational properties of flexible polymers partially confined to narrow pores of different size using configurational biased Monte Carlo simulations under athermal conditions. The asphericity of the chain has been studied as a function of its center of mass position along the pore axis and as a fun…
Polymer crystallization and propertiesForce Microscopy Techniques and ApplicationsBlock Copolymer Self-Assembly
Chao Gao、Wei Tang、Deyue Yan2002-05-24Journal of Polymer Science Part A Polymer Chemistry
Abstract Various water‐soluble hyperbranched poly(ester amine)s were synthesized by the direct polyaddition of diamines to diacrylates in the absence of a catalyst. Each diamine contained a secondary amino group and a primary amino group such as 1‐(2‐aminoethyl)piperazine, N ‐methyl‐1,3‐propanediamine, or N ‐ethylethy…
Chemical Synthesis and AnalysisDendrimers and Hyperbranched PolymersSynthesis and properties of polymers
G. Mackay Salley、Rafael Valiente、H. U. Güdel2002-05-24Journal of Physics Condensed Matter
Excitation into the Yb 3+ 2 F 5/2 excited states leads to visible-by-eye green luminescence spanning the spectral region from 490 to 790 nm, with a quadratic power dependence. Optical absorption, luminescence, and excitation spectroscopy as well as pulsed measurements on single-crystal SrCl 2 :Yb(1%), Tb(1%) are used…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Horacio López‐Sandoval、Rosalinda Contreras、Albert Escuer 等 8 位作者2002-05-24Journal of the Chemical Society Dalton Transactions
The trinuclear copper(II) complex [Cu3(cpse)3(H2O)3]·8.5H2O has been obtained from mononuclear [Cu(Hcpse)2]·H2O {H2cpse = N-[2-hydroxy-1(S)-methyl-2(S)-phenylethyl]-N-methylglycine, threo isomer} and crystallographically characterised. The structure of the compound consists of three CuII atoms, each having distorted s…
Metal complexes synthesis and propertiesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
T. Mahalingam、J.S.P. Chitra、S. Rajendran 等 4 位作者2002-05-24Semiconductor Science and Technology
Semiconducting Cu 2 O thin films were electrodeposited potentiostatically on Cu and SnO 2 substrates. The deposition kinetics of film growth and the conditions to obtain spotty and uniform Cu 2 O films are studied. X-ray diffraction studies revealed the formation of single phase cubic Cu 2 O films. The effects of depo…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
A. El Hichou、A. Bougrine、Jean‐Luc Bubendorff 等 6 位作者2002-05-24Semiconductor Science and Technology
Undoped ZnO and F-doped ZnF x O (1− x ) ( x = 5 at%) films prepared by the spray pyrolysis (SP) technique have been studied using cathodoluminescence imaging and spectroscopy, x-ray diffraction and spectrophotometry. These films, deposited at the optimal substrate temperature ( T s = 450 °C), present a hexagonal close…
ZnO doping and propertiesThin-Film Transistor TechnologiesGa2O3 and related materials
Abhijit Bhattacharyya、L Sweeney、M.G. Faulkner2002-05-24Smart Materials and Structures
This paper has experimentally addressed the determination of the convection coefficient for a nichrome and nickel-titanium (NiTi) shape memory alloy (SMA) wire subjected to constant load, heated by electrical current and cooled by free convection (with the current switched off). The entire cycle of actuation is such t…
Magnetic and transport properties of perovskites and related materialsShape Memory Alloy Transformations
A. Pérez-Rodrı́guez、F Carrera、J. Poyato 等 4 位作者2002-05-24Nanotechnology
We have studied the effect of ultrasound on two different natural macroscopic vermiculite samples from Ojén and Santa Olalla (Spain). We describe the conditions for the preparation of nanometric particles by sonochemistry. Sonication produces not only a delamination effect in the [00l] direction, but also a breaking o…
Clay minerals and soil interactionsIron oxide chemistry and applicationsElectrokinetic Soil Remediation Techniques
Deokgeun Kim、Jin‐Woo Choi、Jin‐Yeol Kim 等 5 位作者2002-05-24Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSize Control of Polyaniline Nanoparticle by Polymer SurfactantDeokgeun Kim, Jinwoo Choi, Jin-Yeol Kim, Yang-Kyoo Han, and Daewon SohnView Author Information Department of Chemistry, Hanyang University, 17 Haengdang Dong, Sungdong Ku, Seoul 133-791, Korea Cite this: Macromolecul…
Conducting polymers and applicationsAnalytical Chemistry and SensorsPolydiacetylene-based materials and applications
Agnès Anne、Christophe Demaille、Jacques Moiroux2002-05-24Macromolecules
In the first part of the study, PEG 3400 −Fc linear polymeric chains bearing an electrochemically active ferrocene (Fc) head at their loose end are terminally attached at the gold electrode surface. The surface concentration of grafted polymeric chains is measured electrochemically under good solvent (water) condition…
Conducting polymers and applicationsPolymer Surface Interaction StudiesMolecular Junctions and Nanostructures
Christine M. Mahoney、Joseph A. Gardella、Jerold C. Rosenfeld2002-05-24Macromolecules
A series of poly(imidesiloxane) (SIM) copolymers have been synthesized from α,ω‘-aminopropylpoly(dimethylsiloxane) (PDMS) of varying lengths, 2,2-bis(4-[4-aminophenoxyl]phenyl)propane (BAPP), and 4,4‘-oxydiphthalic anhydride (ODPA). In this series, the total composition of PDMS was maintained at 10 wt % with multiple…
Corrosion Behavior and InhibitionMetal and Thin Film MechanicsSilicone and Siloxane Chemistry