Iosu Unamuno、Juan M. Gutiérrez‐Zorrilla、Antonio Luque 等 7 位作者1998-11-24Inorganic Chemistry
The ion pair charge-transfer (IPCT) complexes (C(14)H(12)N(2))[Cu(opba)].3H(2)O (1) and Na(2)(C(12)H(12)N(2))[Cu(opba)](2).4H(2)O (2), opba = o-phenylenebis(oxamate), have been isolated. Both compounds crystallize in the triclinic space group P&onemacr;. Crystal data for the compounds 1, a = 7.3216(13) Å, b = 10.1756(…
Magnetism in coordination complexesNonlinear Optical Materials ResearchOrganic and Molecular Conductors Research
Masaki Iida、Takayoshi Sasaki、Mamoru Watanabe1998-11-24Chemistry of Materials
Hollow microspheres of titanium dioxide have been prepared by spray-drying a colloidal suspension of an exfoliated titanate followed by heating above 400 °C. The individual hollow sphere with a diameter of tens of micrometers is characterized by its extremely thin crust, tens of nanometers thick. Because 99% of the pa…
Bone Tissue Engineering MaterialsAdvanced Photocatalysis TechniquesSilicone and Siloxane Chemistry
B. V. Andryushechkin、K. N. Eltsov、V. M. Shevlyuga1998-11-24arXiv
The structure of AgCl formed in the course of chlorine adsorption on Ag(111) surface was studied by STM. For the first time atomic resolution STM images of silver chloride were obtained. The silver chloride was detected as small (30-60 A in diameter) islands located on the atomic terraces. The upper plane of the islan…
Materials Science
Thierry Cabioc’h、M. Jaouen、M.F. Denanot 等 4 位作者1998-11-23Applied Physics Letters
We study the influence of implantation parameters (temperature, implanted dose, and current density) on the microstructure of carbon onions produced by carbon ion implantation into silver substrates held at elevated temperature. Carbon onions are synthesized only for temperatures higher than 400 °C. An increase of the…
Advancements in Battery MaterialsInterconnection Networks and SystemsCarbon and Quantum Dots Applications
P. Deixler、Jonathan G. Terry、I.D. Hawkins 等 12 位作者1998-11-23Applied Physics Letters
We have studied n-type silicon containing gold and gold–hydrogen complexes using high-resolution “Laplace” deep-level transient spectroscopy. This technique has enabled two quite distinct electron emission rates to be observed at temperatures between 240 and 300 K. These are associated with the gold acceptor and the l…
Advanced Chemical Physics StudiesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Hsiang‐Lin Liu、S. L. Cooper、S‐W. Cheong1998-11-23Physical Review Letters
We report an optical reflectivity study of charge and spin ordering in ${\mathrm{Bi}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ ( $x\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.74$ and 0.82) single crystals. In the high temperature phase, $T>{T}_{\mathrm{co}}$, which is characterized by ferroma…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
S. Belin、Kamran Behnia、André Deluzet1998-11-23Physical Review Letters
The first study of thermal conductivity, $\ensuremath{\kappa}$, in a quasi-two-dimensional organic superconductor of the $\ensuremath{\kappa}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}X$ family reveals features analogous to those already observed in the cuprates. The onset of superconductivity is ass…
Physics of Superconductivity and MagnetismMagnetism in coordination complexesOrganic and Molecular Conductors Research
Hiroshi Yamaguchi、Yoshikazu Homma1998-11-23Applied Physics Letters
When we use a scanning electron microscope-molecular beam epitaxy system with a GaAs (111)A substrate that dramatically improves the flatness of the growing surface, it makes possible detailed observations of the near-equilibrium growth processes of island nucleation, coalescence, and step motion. These observations a…
Advanced Electron Microscopy Techniques and ApplicationsMachine Learning in Materials ScienceElectron and X-Ray Spectroscopy Techniques
Dori Gal、Gary Hodes、Dimitrios Hariskos 等 5 位作者1998-11-23Applied Physics Letters
Semiconductor quantum dots and wires are the subject of great interest, mainly due to their size-dependent electronic structures, in particular increased band gap and therefore optoelectronic properties. We have electrodeposited films of size-quantized CdS (∼4 to 5 nm cross section by 15 nm height) as a buffer layer o…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications
Hideo Kohno、Seiji Takeda1998-11-23Applied Physics Letters
We have fabricated a self-organized chain of crystalline-silicon nanospheres via an extension of the vapor-liquid-solid mechanism. Transmission electron microscopy, electron energy-loss spectroscopy, and electron-induced x-ray fluorescence analyses have proved that the crystalline silicon nanospheres, of about 10 nm i…
Quantum Dots Synthesis And PropertiesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
G. Allodi、R. De Renzi、F. Licci 等 4 位作者1998-11-23Physical Review Letters
The local magnetism and charge ordering of ${\mathrm{La}}_{0.5}{\mathrm{Ca}}_{0.5}{\mathrm{MnO}}_{3}$ was investigated between room temperature and 1.3 K by means of ${}^{139}\mathrm{La}$ and ${}^{55}\mathrm{Mn}$ NMR. Antiferromagnetic and ferromagnetic domains are assigned unambiguously to the insulating charge order…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Morito Akiyama、Chao‐Nan Xu、Kazuhiro Nonaka 等 4 位作者1998-11-23Applied Physics Letters
The triboluminescence intensity from stress-activated Sr3Al2O6:Eu,Dy (SAO-ED) was so strong that we could see it with the naked eye in the atmosphere. The luminescence integrated intensity was about five hundred times as high as that of crystal sugar. We think that the light emission is due to the movement of dislocat…
Luminescence Properties of Advanced MaterialsPhotonic Crystals and Applications3D IC and TSV technologies
Luca Angelani、Giorgio Parisi、Giancarlo Ruocco 等 4 位作者1998-11-23Physical Review Letters
A simple model to investigate the long time dynamics of glass formers is presented and applied to study a Lennard-Jones system in supercooled and glassy phases. According to our model, the point representing the system in the configurational phase space performs harmonic vibrations around (and activated jumps between)…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesTheoretical and Computational Physics
K. G. Cho、D. Kumar、Paul H. Holloway 等 4 位作者1998-11-23Applied Physics Letters
Europium-doped yttrium oxide (Eu:Y2O3) luminescent thin films have been grown in situ on single crystal (0001) sapphire substrates using a pulsed laser deposition technique. The films grown under different deposition conditions have been characterized using microstructural and luminescent measurements. The photolumine…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsRadiation Detection and Scintillator Technologies
D.A. Hughes、D. C. Chrzan、Quan Liu 等 4 位作者1998-11-23Physical Review Letters
The measurement of misorientation angle distributions following different amounts of deformation in cold-rolled aluminum and nickel and compressed stainless steel is reported. The scaling of the dislocation cell boundary misorientation angle distributions is studied. Surprisingly, the distributions for the small to la…
Microstructure and mechanical propertiesHigh Temperature Alloys and CreepMetallurgy and Material Forming
R. Caciuffo、G. Amoretti、A. P. Murani 等 6 位作者1998-11-23Physical Review Letters
Neutron spectroscopy has been used to observe transitions between the energy levels for the 21 different orientations of the $S\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}10$ spin ground state of an octanuclear iron molecular cluster $({\mathrm{Fe}}_{8})$ exhibiting quantum tunneling of the magnetization. The r…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetalloenzymes and iron-sulfur proteins
Qi Chen、Z. John Zhang1998-11-23OpenAlex
Superparamagnetism is a unique and important aspect of magnetism in nanoparticles. The superparamagnetic properties of the MgFe2O4 spinel ferrite nanoparticles with the particle size from about 6 to 18 nm are studied. The blocking temperature is a function of the particle size and increases with increasing particle si…
Magnetic properties of thin filmsMagnetic Properties and Synthesis of FerritesCharacterization and Applications of Magnetic Nanoparticles
K. Ghosh、C. J. Lobb、R. L. Greene 等 7 位作者1998-11-23OpenAlex
We report a dc magnetization study of the critical phenomena in a high-quality single crystal of the double-exchange ferromagnet ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$. We have determined the critical temperature $({T}_{C}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}354.0\ifmmode\pm\else\text…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Wei‐Qiang Han、Yoshio Bando、Keiji Kurashima 等 4 位作者1998-11-23OpenAlex
A method involving carbon nanotubes substituted reaction was developed for the synthesis of mass quantities of boron nitride nanotubes. Boron oxide vapor was reacted with nitrogen gas in the presence of carbon nanotubes to form boron nitride nanotubes, whose diameters and lengths are similar to those of the starting c…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research
Marco Buongiorno Nardelli、Boris I. Yakobson、J. Bernholc1998-11-23OpenAlex
Large-scale molecular dynamics simulations were used to study the response of carbon nanotubes to a tensile load. Plastic or brittle behaviors can occur depending upon the external conditions and tube symmetry. All tubes are brittle at high strain and low temperature, while at low strain and high temperature armchair…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research