Sophie Hermans、Jeremy Sloan、Douglas S. Shephard 等 5 位作者2002-01-23Chemical Communications
Cluster-derived bimetallic nanoparticles have been deposited onto multi-wall carbon nanotubes and shown to be generally homogeneously dispersed, of uniform small sizes, of the same composition as the starting mixed-metal clusters, and to have a tendency to align at the tips of the tubules.
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
Akihiko Machida、Yutaka Moritomo、Kenji Ohoyama 等 5 位作者2002-01-23Physical review. B, Condensed matter
$B$-site substitution effects on the structural and magnetic properties are investigated in ${\mathrm{Nd}}_{1/2}{\mathrm{Ca}}_{1/2}$$({\mathrm{Mn}}_{0.97}{M}_{0.03})$${\mathrm{O}}_{3}$ $(M=\mathrm{Al},$ Zn, Sc, Fe, Ni, Co, and Cr). With decreases of temperature below $\ensuremath{\sim}200 \mathrm{K},$ these compounds…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Toshihiko Yokoyama、Kaoru Okamoto、Toshiaki Ohta 等 5 位作者2002-01-23Physical review. B, Condensed matter
The local structure and electronic state of a photomagnetic material ${\mathrm{Cs}}_{0.8}{\mathrm{Co}}_{1.1}(3\ensuremath{-}\mathrm{cyanopyridine}{)}_{1.9}\mathrm{W}(\mathrm{CN}{)}_{8}\ensuremath{\cdot}2.1{\mathrm{H}}_{2}\mathrm{O}$ have been investigated by means of x-ray-absorption fine structure (XAFS) spectroscopy…
Metal complexes synthesis and propertiesMagnetism in coordination complexesOrganic and Molecular Conductors Research
Johan Hjelm、Edwin C. Constable、Egbert Figgemeier 等 8 位作者2002-01-23Chemical Communications
A new rod-like coordination polymer consisting of (Ru-(terpy)2) motifs bridged by bithiophene units has been prepared by electrochemical polymerisation in acidic organic medium.
Conducting polymers and applicationsPolyoxometalates: Synthesis and ApplicationsElectrochemical Analysis and Applications
O. Waldmann、Lang Zhao、Laurence K. Thompson2002-01-23Physical Review Letters
The magnetic anisotropy of a novel Mn(II)- [3x3] grid complex was investigated by means of high-field torque magnetometry. Torque vs field curves at low temperatures demonstrates a ground state with S>0 and exhibits a torque step due to a field-induced level crossing at B(*) approximately 7.5 T, accompanied by an abru…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications
Jean Galy、Renée Enjalbert、Pierre Lecante 等 4 位作者2002-01-23Inorganic Chemistry
This paper presents structural studies on crystalline and liquid AsCl(3), performed using X-ray diffraction (XRD) and wide-angle X-ray scattering (WAXS) in the 176-250 K temperature range and at 295 K for the crystalline and liquid samples, respectively. The XRD results, collected using a single-crystal diffractometer…
Chemical and Physical Properties in Aqueous SolutionsThermal and Kinetic AnalysisX-ray Diffraction in Crystallography
Xiaqin Wang、De‐Chun Deng2002-01-23Journal of Applied Polymer Science
Abstract A comprehensive mathematical model was established by considering the main and side reactions for solid‐state polycondensation of poly(ethylene terephthalate). The effect of temperature on chain mobility was used to estimate the rate constants of chemical reactions. The polymer crystalline fraction was modele…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesSynthesis and properties of polymers
Shigui Zhao、Shengyu Feng2002-01-23Journal of Applied Polymer Science
Abstract Heat‐curable silicone rubber (HCSR) was prepared by using vinyl‐containing silicone resin (VSR) as the crosslinking agent instead of polyvinylsilicone oil (C gum). Mechanical properties and crosslink density of the vulcanizates were measured. The results indicate that VSR is a good crosslinking agent for HCSR…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingSilicone and Siloxane Chemistry
Hiromichi Sonoda、Shin‐ichi Urayama、Keiichi Takamizawa 等 7 位作者2002-01-23Journal of Biomedical Materials Research
The development of an artificial graft requires formulation of biomechanical design criteria. The compliance of artifical grafts, based on the intraluminal pressure-internal diameter (Pi-Di) relationship, was measured by a novel method using a digital X-ray imaging system coupled with an edge detection algorithm and a…
Aortic Disease and Treatment ApproachesElectrospun Nanofibers in Biomedical ApplicationsCardiac and Coronary Surgery Techniques
Christophe Bucher、Daniel Seidel、Vincent M. Lynch 等 4 位作者2002-01-23Chemical Communications
The synthesis, characterization, and X-ray structure of a heptapyrrolic macrocycle, [30]heptaphyrin(1.1.1.1.1.0.0) is reported; despite showing aromatic features, it exhibits a 'figure eight'-like structure in the solid state.
Porphyrin and Phthalocyanine ChemistrySurface Chemistry and CatalysisPorphyrin Metabolism and Disorders
David J. Singh、M. Gupta、R.S. Gupta2002-01-23Physical review. B, Condensed matter
Spinel structure ${\mathrm{MnFe}}_{2}{\mathrm{O}}_{4}$ is investigated using density functional calculations. The ground state is a high spin ferrimagnet in agreement with experiment. The band structure shows a low carrier density half metal in the fully ordered state, in contrast to experimental characterizations of…
Multiferroics and related materialsMagnetic Properties and Synthesis of FerritesAdvanced Condensed Matter Physics
Maria Jonforsen、Tomas Johansson、Olle Inganäs 等 4 位作者2002-01-23Macromolecules
Synthesis and characterization of poly(quinoxaline vinylene)s and poly(pyridopyrazine vinylene)s with linear and branched aliphatic side chains are reported. The electron affinity of the polymers was measured with cyclic voltammetry (CV) and found to be highest for the pyridopyrazine vinylene polymers. Compared to CN-…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and properties of polymers
Sujoy Roy、Mahmud Khan、Yuqiao Guo 等 5 位作者2002-01-23Physical review. B, Condensed matter
The magnetic and electrical transport properties and relative thermal expansion measurements on ${\mathrm{GdBaCo}}_{2}{\mathrm{O}}_{5.45}$ show the existence of a stabilized intermediate spin state of ${\mathrm{Co}}^{3+}$ in the temperature region $108 \mathrm{K}<~T<~365 \mathrm{K}.$ A charge ordering effect at…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Suzanne M. Fielding、Peter Sollich2002-01-23Physical Review Letters
We study the nonequilibrium fluctuation-dissipation theorem (FDT) in the glass phase of Bouchaud's trap model. We incorporate an arbitrary observable m and obtain its correlation and response functions in closed form. A limiting nonequilibrium FDT plot is approached at long times for most choices of m. In contrast to…
Material Dynamics and PropertiesTheoretical and Computational PhysicsAdvanced Thermodynamics and Statistical Mechanics
Derek L. Patton、Mi-Kyoung Park、Shuangxi Wang 等 4 位作者2002-01-23Langmuir
In this work we describe the evanescent waveguide characterization and photoalignment of azobenzene-functionalized dendrimer ultrathin films. Azobenzene dyes were grafted to the perimeter of polyamidoamine dendrimers. The photoisomerization and photoalignment properties were first investigated in relation to solution…
Dendrimers and Hyperbranched PolymersPhotochromic and Fluorescence ChemistrySynthesis and properties of polymers
Zhiling Ma、Min Zhao、Hengfeng Hu 等 5 位作者2002-01-23Journal of Applied Polymer Science
Abstract A phosphoric acid–pentaerythritol–melamine copolymer was selected as an intumescent flame retardant (IFR). The influence of α‐methacrylic acid grafted polypropylene (PP‐ g ‐MAA) on the properties and compatibility of IFR/PP composites was studied. The results obtained from mechanical tests and scanning electr…
Flame retardant materials and propertiesMaterial Properties and ApplicationsEnvironmental and Industrial Safety
Dennis Vitkup、Dagmar Ringe、Martin Karplus 等 4 位作者2002-01-23Proteins Structure Function and Bioinformatics
The R-factor and R-free are commonly used to measure the quality of protein models obtained in X-ray crystallography. Well-refined protein structures usually have R-factors in the range of 20-25%, whereas intrinsic errors in the experimental data are usually around 5%. We use molecular dynamics simulations to perform…
Protein Structure and DynamicsRNA and protein synthesis mechanismsEnzyme Structure and Function
Atsushi Shimojima、Kazuyuki Kuroda2002-01-23Langmuir
Multilayered inorganic−organic hybrids were prepared by cohydrolysis and polycondensation of alkyltriethoxysilanes (C n TES, n = 8−18) and tetraethoxysilane (TEOS). Thin films were deposited from homogeneous solutions containing the oligomeric species by dip-coating. Self-assembly of co-condensed oligomers into lamell…
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsSilicone and Siloxane Chemistry
L. Macalik、J. Hanuza、А. А. Каминский2002-01-23Journal of Raman Spectroscopy
Abstract The direction of the transition dipole moments for the vibrations of the single W O W and double W O O W oxygen bridges in layered scheelite tungstates is derived from the Polarized infrared and Raman spectra of the KGd(WO 4 ) 2 single crystal. Their experimental values are compared with those obtained from t…
Luminescence Properties of Advanced MaterialsSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds
Antonino Gulino、Francesco Castelli、Paolo Dapporto 等 5 位作者2002-01-23Chemistry of Materials
The Cd(C 5 F 6 HO 2 ) 2 ·2H 2 O complex was investigated by X-ray crystallography, mass spectroscopy, 1 H NMR spectroscopy, TG−DTG thermal measurements, and infrared transmittance spectroscopy. X-ray single-crystal data show that the cadmium ion is chelated by the oxygens of the hfa anion ligand and bound to the oxyge…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsAnalytical Chemistry and Sensors