Kohjiro Hashizume、Y. Mizobe、Masanobu Hidai1996-07-23Organometallics
The hydrosulfido-bridged diruthenium complex [Cp*RuCl(μ-SH) 2 RuCp*Cl] ( 4; Cp* = η 5 -C 5 Me 5 ) was obtained by the reaction of either [(Cp*Ru) 4 (μ 3 -Cl) 4 ] ( 1 ) or [Cp*RuCl(μ-Cl) 2 RuCp*Cl] with excess H 2 S gas, while the reactions of 1 with thiols resulted in the formation of the thiolato-bridged diruthenium…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials
Steffen Wilke、Morrel H. Cohen、Matthias Scheffler1996-07-23arXiv
The quantity w^N(r) = ( 1/ k^2 T_el)[partial n(r, T_el) / partial T_el]_(v(r),N) is introduced as a convenient measure of the local isoelectronic reactivity of surfaces. It characterizes the local polarizability of the surface and it can be calculated easily. The quantity w^N(r) supplements the charge transfer reactiv…
Materials Sciencemtrl-th
J. C. Salamone1996-07-23OpenAlex
Additives Biodegradable Polymers Biomaterials for the Body Biomimetic Materials Biosensors Blends Block Copolymers Block Copolymer Micelles Comb-like Polymers Commercial Resins, Plastics, Elastomers Composites Compatibilizers Conducting Polymers Contact Lens Materials Controlled Release Dendrictic Polymers Dendrimers…
Silicone and Siloxane Chemistry
G. D. Mahan、Jorge O. Sofo1996-07-23OpenAlex
What electronic structure provides the largest figure of merit for thermoelectric materials? To answer that question, we write the electrical conductivity, thermopower, and thermal conductivity as integrals of a single function, the transport distribution. Then we derive the mathematical function for the transport dis…
Advanced Thermoelectric Materials and DevicesAdvanced Thermodynamics and Statistical Mechanics
Malay Ghosh、K. L. Mittal1996-07-23OpenAlex
Introduction History of the Invention and Development of the Polyimides, C. E. Sroog Synthesis Synthesis of Polyimides, Tohru Takekoshi Synthesis of Polyamideimides, Yoshio Imai Synthesis of Fluorinated Polyimides, Shigekuni Sasaki and Shiro Nishi Photosensitive Polyimides, Molecular Design and Synthesis, Toshihiko Om…
Synthesis and properties of polymersSilicone and Siloxane Chemistry
R. J. Nelmes、M. I. McMahon1996-07-22Physical Review Letters
The well-known phase transition from InSb-IV to InSb-III at $\ensuremath{\sim}10\mathrm{GPa}$ has been studied using angle-dispersive powder-diffraction techniques. It is shown that the transition proceeds through a previously undetected intermediate phase, and that InSb-III is in fact identical with InSb-II. The appa…
High-pressure geophysics and materialsMagnetic and transport properties of perovskites and related materialsRare-earth and actinide compounds
Wei‐I Lee、Ruey-Ling Young Ruey-Ling Young1996-07-22Applied Physics Letters
A systematic study of the defects in ZnO has been performed. The two commonly observed levels (L1, L2), located at around 0.15 and 0.24 eV under the conduction band, have been identified as native defects. The deep level transient spectroscopy depth profiling technique is applied on multilayer-chip-type ZnO varistors…
ZnO doping and propertiesThin-Film Transistor Technologies
M. Ben‐Chorin、B. Averboukh、Dmitry Kovalev 等 5 位作者1996-07-22Physical Review Letters
The photoluminescence excitation technique is used to monitor the absorption characteristics of Si nanocrystals. Contributions from different critical points are identified, and their shift with reduced size is deduced. The enhancement of the oscillator strength of the indirect optical transitions due to the confineme…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsSemiconductor materials and interfaces
S. Ravi、S. Ravi P. Silva、Shi Xu 等 6 位作者1996-07-22Applied Physics Letters
The microstructure of filtered cathodic vacuum arc deposited tetrahedral amorphous carbon films is studied as a function of ion energy. An optimum energy window in the density and C–C sp3 content at an ion energy of ∼90 eV observed in this study. It is shown that the density of the amorphous carbon films are closely r…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis
T. G. Perring、G. Aeppli、S. M. Hayden 等 6 位作者1996-07-22Physical Review Letters
We use inelastic neutron scattering to measure the spin wave dispersion throughout the Brillouin zone of the double-exchange ferromagnet L${\mathrm{a}}_{0.7}$P${\mathrm{b}}_{0.3}$Mn${\mathrm{O}}_{3}$. Magnons with energies as high as 95 meV are directly observed and an unexpectedly simple Heisenberg Hamiltonian, with…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsAtomic and Subatomic Physics Research
É.L. Nagaev、A.I. Podel'shchikov1996-07-22Journal of Physics Condensed Matter
States of charge carriers in transition metal compounds with low-frequency zero-spin - nonzero-spin transitions (e.g. some Co compounds) are investigated. Such transitions indicate the appearance of magnetic excitons on the transition metal ions. Charge carriers interact strongly with the excitons via exchange forces.…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
U. Buchenau、Carlos Pecharromán、Reiner Zorn 等 4 位作者1996-07-22Physical Review Letters
The localization of low-frequency vibrational modes in amorphous solids can be determined from incoherent neutron scattering. Time-of-flight data from polystyrene and polybutadiene show a localization of the boson peak modes to about ten monomers.
Material Dynamics and PropertiesSpectroscopy and Quantum Chemical StudiesQuantum, superfluid, helium dynamics
Christel Drewke、Matthias Klein、Dorothee Clade 等 6 位作者1996-07-22FEBS Letters
The Escherichia coli pdxC(serC) gene codes for a transaminase (EC 2.6.1.52). The gene is involved in both pyridoxine (vitamin B6) and serine biosynthesis and was overexpressed as a MalE/PdxC(SerC) fusion protein. The fusion protein was purified by affinity chromatography on an amylose resin and hydrolyzed in the prese…
Bacterial Genetics and BiotechnologyEnzyme Structure and FunctionBiochemical and Molecular Research
Akihiko Matsuyama、Tadaya Kato1996-07-22The Journal of Chemical Physics
A simple model is presented to describe the phase behavior in binary mixtures of a flexible polymer and a liquid crystal. By using the incompressible approximation to the Onsager theory which combined both the excluded volume interactions between the liquid crystals and the attractive interaction due to the alignment…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
X. L. Wu、G. G. Siu、S. Y. Tong 等 8 位作者1996-07-22Applied Physics Letters
Nanocrystallite size distribution and structural properties in alternating hydrogenated nanocrystalline silicon/amorphous silicon multilayers were investigated by means of Raman scattering. The obtained Raman spectra show a broad peak at ∼480 cm−1 from amorphous Si and some small peaks superposed on the broad peak. Ac…
Thin-Film Transistor TechnologiesSilicon Nanostructures and PhotoluminescenceNonlinear Optical Materials Studies
P. N. Segrè、P. N. Pusey1996-07-22Physical Review Letters
By dynamic light scattering we have studied concentrated suspensions of ``hard-sphere'' colloidal particles in their equilibrium and metastable fluid states. We have found a simple, as yet unexplained, scaling procedure which collapses the measured intermediate scattering functions describing structural relaxation and…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesRheology and Fluid Dynamics Studies
F. L. Coffman、Rui Cao、P. Pianetta 等 6 位作者1996-07-22Applied Physics Letters
Near-edge x-ray absorption fine structure (NEXAFS) measurements were performed on a variety of carbon materials, covering a range of hybrid bonding character from pure sp3 type to pure sp2 type. Diamond, chemical vapor deposited (CVD) diamond films of varying quality. Diamond-like carbon (DLC) films, and graphite were…
Advanced ceramic materials synthesisMetal and Thin Film MechanicsDiamond and Carbon-based Materials Research
Simon J. L. Billinge、R. G. Difrancesco、G. H. Kwei 等 5 位作者1996-07-22Physical Review Letters
The local atomic structure of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ ( $x\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.12,$ 0.21, and 0.25) has been studied using pair-distribution-function analysis of neutron powder-diffraction data. A change is seen in the local structure which…
High-pressure geophysics and materialsMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Riccardo Zanasi1996-07-22The Journal of Chemical Physics
The reliability of the continuous transformations of origin of the current density method, which makes the transverse paramagnetic current vanish (CTOCD-PZ), for the prediction of nearly gauge-origin independent molecular magnetic susceptibility and gauge-origin independent nuclear magnetic shielding, is proved on the…
Advanced Chemical Physics StudiesMagnetism in coordination complexesAdvanced NMR Techniques and Applications
Riccardo Rosso、Epifanio G. Virga1996-07-21Journal of Physics A Mathematical and General
For nematic liquid crystals, we study the local stability of a radial hedgehog against biaxial perturbations. Our analysis employs the Landau - de Gennes functional to describe the free energy stored in a ball, whose radius is a parameter of the model. We find that a radial hedgehog may be either unstable or metastabl…
Liquid Crystal Research AdvancementsAdvanced Materials and MechanicsPlant Reproductive Biology