Materials Literature

文献浏览

按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。

清除
第 123675 / 131413 页 · 当前展示 2,473,481–2,473,500 / 2,628,253 条匹配结果 · 摘要仅作预览

What density-functional theory can tell us about the spin-density wave in Cr

Stefaan Cottenier、Bart de Vries、Johan Meersschaut 等 4 位作者2002-03-15Journal of Physics Condensed Matter

The energy-versus-volume curve of the spin-density wave (SDW) in body-centred-cubic Cr is calculated with the density functional theory/full-potential linearized augmented plane wave (DFT/FLAPW) method using the generalized gradient approximation (GGA). The predicted ground state is not the SDW, in contrast to an earl…

Advanced Chemical Physics StudiesIron-based superconductors researchHeusler alloys: electronic and magnetic properties

Magnetic Resonance Imaging Detects a Specific Peptide−Protein Binding Event

Luis M. De Leon Rodriguez、Alfonso Bouzas Ortíz、Allison L. Weiner 等 7 位作者2002-03-15Journal of the American Chemical Society

DOTA was conjugated to the N-terminus of a 12-mer peptide by using standard peptide synthesis chemistry. The peptide, first isolated by phage display, maintained a high affinity for its protein-binding target, Gal-80, even with GdDOTA attached. The high affinity constant (KA = 5 x 105 M-1) combined with the high relax…

Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesRadiopharmaceutical Chemistry and Applications

Controlled Room Temperature Synthesis of CoFe2O4 Nanoparticles through a Block Copolymer Nanoreactor Route

Sufi R. Ahmed、Peter Kofinas2002-03-15Macromolecules

The synthesis and characterization of well-dispersed, CoFe 2 O 4 nanoparticles within a polymer matrix at room temperature are reported. Comparable inorganic synthetic methods require heating at high temperatures in order to produce this particular mixed-metal oxide composition. Our modification of prior reported temp…

Organometallic Complex Synthesis and CatalysisBlock Copolymer Self-AssemblySynthetic Organic Chemistry Methods

Effects of intentionally introduced hydrogen on the electrical properties of ZnO layers grown by metalorganic chemical vapor deposition

B. Theys、Vincent Sallet、François Jomard 等 6 位作者2002-03-15Journal of Applied Physics

Unintentionally doped ZnO layers grown epitaxially on a sapphire substrate have been exposed either to a hydrogen or deuterium plasma. Secondary ion mass spectroscopy measurements performed subsequently showed a rapid diffusion of hydrogen in these layers. Furthermore, the presence of hydrogen in the ZnO samples is fo…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Carbon nanotubes synthesized by Ni-assisted atmospheric pressure thermal chemical vapor deposition

G.S. Choi、Y. S. Cho、Sehwa Hong 等 6 位作者2002-03-15Journal of Applied Physics

A detailed systematic study on the growth morphology of carbon nanotubes (CNTs) on Si in atmospheric pressure thermal chemical vapor deposition was undertaken. The role of NH3 for vertical alignment of CNTs was investigated. The direct cause for the alignment was a dense distribution of the catalytic metal particles,…

Carbon Nanotubes in CompositesGraphene research and applicationsDiamond and Carbon-based Materials Research

Raman spectra of fluorine-doped silica glasses with various fictive temperatures

Noriaki Shimodaira、Kazuya Saito、Akira J. Ikushima2002-03-15Journal of Applied Physics

We have demonstrated the change of the Raman spectra in F-doped silica glasses with various fictive temperatures, and have also presented a useful peak-deconvolution technique for evaluating the relative concentration of D1 and D2 bands that could be attributed to four- and three-membered ring structures. The intensit…

Luminescence Properties of Advanced MaterialsGlass properties and applicationsMineralogy and Gemology Studies

Compartmentalization of a Gadolinium Complex in the Apoferritin Cavity: A Route To Obtain High Relaxivity Contrast Agents for Magnetic Resonance Imaging

Silvio Aime、Luca Frullano、Simonetta Geninatti Crich2002-03-15Angewandte Chemie

Eine bemerkenswerte Relaxationsverstärkung von Wasserprotonen wurde in Lösungen nachgewiesen, die mit GdHPDO3A beladenes Apoferritin (siehe Abbildung) enthalten. Der Einschluss des Komplexes im Apoferritin (innerer Durchmesser: 7.5 nm, äußerer Durchmesser: 12.5 nm) erhöht die Anzahl dipolarer Wechselwirkungen zwischen…

Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesAdvanced NMR Techniques and Applications

Tight-binding calculations of the band structure and total energies of the various phases of magnesium

H. J. Gotsis、D. A. Papaconstantopoulos、Michael J. Mehl2002-03-15Physical review. B, Condensed matter

Tight-binding calculations for Mg in a variety of crystal structures are reported using the nonorthogonal tight-binding model with parameters selected to fit accurately first-principles results. These parameters correctly predict hcp to be the stable crystal structure. We have calculated electronic properties (band st…

Magnesium Alloys: Properties and ApplicationsBoron and Carbon Nanomaterials ResearchSuperconductivity in MgB2 and Alloys

Evidence for a polar biaxial SmA phase (CPA) in the sequence SmA–CPA–B2

Martin Schröder、Siegmar Diele、Natella Pancenko 等 5 位作者2002-03-15Journal of Materials Chemistry

The isobaric phase diagram of a binary system is presented where one mixing component is an achiral five-ring bent-core mesogen and the other is the electron acceptor compound 2,4,7-trinitrofluorenone (TNF). In the mixed phase region a SmA phase as well as a polar (antiferroelectric) biaxial SmA phase (CPA) are induce…

Liquid Crystal Research AdvancementsNonlinear Optical Materials ResearchPhotochemistry and Electron Transfer Studies

Diffusion-Limited, Aggregation-Based, Mesoscopic Assembly of Roughened Core-Shell Bimetallic Nanoparticles into Fractal Networks at the Air-Water Interface

Yongdong Jin、Shaojun Dong2002-03-15Angewandte Chemie International Edition

The concentration of the plating solution enables control over the fine-tuning of fractal patterns and also drastically affects the crystal growth of Ag/Au core–shell roughened nanoparticles through diffusion-limited aggregation. At low concentrations there are more open spaces in the well-ramified fractal pattern tha…

Gold and Silver Nanoparticles Synthesis and ApplicationsTheoretical and Computational PhysicsPickering emulsions and particle stabilization

Facile, Efficient Conjugation of a Trifunctional Lanthanide Chelate to a Peripheral Benzodiazepine Receptor Ligand

H. Charles Manning、Timothy S. Goebel、J.N. Marx 等 4 位作者2002-03-15Organic Letters

[reaction: see text] Receptor-mediated imaging and therapy of diseased tissue is rapidly gaining favor in the medical community. The synthesis and facile aqueous/organic coupling of a peripheral-type benzodiazepine receptor ligand to a cyclen-based fluorophore is described herein. The contrast agent QM-CTMC-PK11195, w…

Glioma Diagnosis and TreatmentMedical Imaging Techniques and ApplicationsLanthanide and Transition Metal Complexes

Adsorption Isotherms of VOCs onto an Activated Carbon Monolith: Experimental Measurement and Correlation with Different Models

Feng Yu、Lingaï Luo、Georges Grévillot2002-03-15Journal of Chemical & Engineering Data

A new material, activated carbon monolith, can be used as an adsorbent to remove volatile organic compounds (VOCs). Vapor−solid adsorption isotherms of three VOCs (toluene, 1-butanol, and ethyl acetate) on an activated carbon monolith were measured at: 20 °C, 60 °C, 100 °C, and 140 °C using a microbalance. The experim…

Mesoporous Materials and CatalysisAdsorption and Cooling SystemsHeat and Mass Transfer in Porous Media

Defect structures and torque on an elongated colloidal particle immersed in a liquid crystal host

Denis Andrienko、Michael P. Allen、Gregor Skačej 等 4 位作者2002-03-15Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Combining molecular dynamics and Monte Carlo simulation, we study defect structures around an elongated colloidal particle embedded in a nematic liquid crystal host. By studying nematic ordering near the particle and the disclination core region, we are able to examine the defect core structure and the difference betw…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsSurfactants and Colloidal Systems

Metal-insulator transition of ferromagnetic ordered double perovskites: (Sr1−yCay)2FeReO6

Hiroaki Kato、Taichi Okuda、Y. Okimoto 等 7 位作者2002-03-15Physical review. B, Condensed matter

Temperature- and composition-control metal-insulator (M-I) transitions have been investigated for ordered double perovskites, $({\mathrm{Sr}}_{1\ensuremath{-}y}{\mathrm{Ca}}_{y}{)}_{2}{\mathrm{FeReO}}_{6}.$ ${\mathrm{Ca}}_{2}{\mathrm{FeReO}}_{6}$ $(y=1)$ shows the thermally induced M-I transition associated with the l…

Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics

Room-temperature magnetic anisotropy of lanthanide complexes: A model study for various coordination polyhedra

Vladimir S. Mironov、Yu. G. Galyametdinov、Arnout Ceulemans 等 5 位作者2002-03-15The Journal of Chemical Physics

The dependence of the room-temperature magnetic anisotropy Δχ of lanthanide complexes on the type of the coordination polyhedron and on the nature of the lanthanide ion is quantitatively analyzed in terms of a model approach based on numerical calculations. The aim of this study is to establish general regularities in…

Theoretical and Computational PhysicsMagnetism in coordination complexesLanthanide and Transition Metal Complexes

Surface morphology and crystal quality of low resistive indium tin oxide grown on yittria-stabilized zirconia

Hiromichi Ohta、Masahiro Orita、Masahiro Hirano 等 4 位作者2002-03-15Journal of Applied Physics

Highly electrically conductive (resistivity: 1×10−4 Ω cm) indium tin oxide (ITO) thin films were grown heteroepitaxially on (111) and (100) surfaces of yttria-stabilized zirconia (YSZ) at a growth temperature of 900 °C using a pulsed-laser deposition technique, and their crystal quality and surface morphology were eva…

ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides

The magnetic structure of YMnO3perovskite revisited

A. Muñóz、J. A. Alonso、M. T. Casáis 等 6 位作者2002-03-15Journal of Physics Condensed Matter

The magnetic structure of the orthorhombic perovskite YMnO 3 has been investigated. A study on a polycrystalline sample based on neutron diffraction data and magnetization measurements has shown that YMnO 3 becomes magnetically ordered below T N = 42 K. In the space group Pnma , the sinusoidal magnetic structure is de…

Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics

Structure of colloid-polymer suspensions

Matthias Fuchs、Kenneth S Schweizer2002-03-15Journal of Physics Condensed Matter

We discuss structural correlations in mixtures of free polymer and colloidal particles on the basis of a microscopic, two-component liquid-state integral equation theory. Whereas in the case of polymers much smaller than the spherical particles the relevant polymer degree of freedom is the centre of mass, for polymers…

Material Dynamics and PropertiesPickering emulsions and particle stabilizationElectrostatics and Colloid Interactions

Human eosinophils produce neurotrophins and secrete nerve growth factor on immunologic stimuli

Hitoshi Kobayashi、Gerald J. Gleich、Joseph H. Butterfield 等 4 位作者2002-03-15Blood

Neurotrophins, such as nerve growth factor (NGF) and neurotrophin-3 (NT-3), are essential for development, function, and survival of peripheral sympathetic and sensory neurons. Most eosinophilic leukocytes in the human body are localized in mucosal tissues; however, the roles of eosinophils in human diseases are not f…

Nerve injury and regenerationNeuropeptides and Animal PhysiologySilk-based biomaterials and applications

Ultrastable and Highly Acidic, Zeolite-Coated Mesoporous Aluminosilicates

D. Trong On、Serge Kaliaguine2002-03-15Angewandte Chemie International Edition

A uniform pore size with a highly ordered structure is still observed for zeolite (ZSM-5)-coated mesoporous aluminosilicates (ZCMesoAS) even after the coating procedure (see transmission electron micrograph). These ZCMesoAS, which are hydrothermally ultrastable and highly acidic owing to the nanocrystalline zeolitic n…

Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisMesoporous Materials and Catalysis