Ian R. Whittall、Mark G. Humphrey、Stephan Houbrechts 等 5 位作者1996-12-24Organometallics
The series of complexes Au(C⋮CR)(PPh 3 ) (R = Ph ( 2 ), 4-C 6 H 4 NO 2 ( 3 ), 4,4‘-C 6 H 4 C 6 H 4 NO 2 ( 4 ), ( E )-4,4‘-C 6 H 4 CH CHC 6 H 4 NO 2 ( 5 ), ( Z )-4,4‘-C 6 H 4 CH CHC 6 H 4 NO 2 ( 6 ), 4,4‘-C 6 H 4 C⋮CC 6 H 4 NO 2 ( 7 ), 4,4‘-C 6 H 4 N CHC 6 H 4 NO 2 ( 8 )) have been synthesized by reaction of AuCl(PPh 3…
Metal complexes synthesis and propertiesNonlinear Optical Materials ResearchInorganic and Organometallic Chemistry
Yoshihiro Miyake、Y. Shiraki、S. Fukatsu1996-12-23Applied Physics Letters
Carrier localization in a disordered potential was studied in type-I strained Si1−xGex/Si superlattices (SLs) where layer widths have been artificially pseudorandomized. The photoluminescence (PL) intensity under a transverse bias voltage varies monotonically and exhibits a folded increase as the bias is increased as…
Silicon and Solar Cell TechnologiesSilicon Nanostructures and PhotoluminescenceSemiconductor materials and interfaces
J. Liu、V.V. Zhirnov、Wonbong Choi 等 7 位作者1996-12-23Applied Physics Letters
Electron emission from a polycrystalline diamond coated silicon field emitter surface was studied using in situ exposure to various gas species during its operation. Significant enhancement of the electron emission was found after the emitting surface was exposed to hydrogen at pressures in the range 5×10−4 to 10−3 To…
Diamond and Carbon-based Materials ResearchPlasma Diagnostics and ApplicationsAtomic and Subatomic Physics Research
M. J. Winton、S. D. Russell、J. A. Wolk 等 4 位作者1996-12-23Applied Physics Letters
Room temperature photoluminescence spectra from samples of chemically etched porous silicon were analyzed as a function of dopant type, dopant concentration, etchant chemistry, and etching times. In stark contrast to electrochemically etched porous silicon, no significant variations in peak location or width were obse…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsAnodic Oxide Films and Nanostructures
J. A. Nucci、Robert R. Keller、John E. Sanchez 等 4 位作者1996-12-23Applied Physics Letters
A correlation between local crystallographic texture and stress-induced void formation in tantalum-encapsulated, copper interconnects was revealed by electron backscattering diffraction studies in a scanning electron microscope. Lines exhibiting an overall stronger 〈111〉 texture showed better resistance to void format…
Electronic Packaging and Soldering Technologies3D IC and TSV technologiesCopper Interconnects and Reliability
T. Osada、S. Kagoshima、N. Miura1996-12-23Physical Review Letters
We theoretically and experimentally study a new type of angular effect of magnetoresistance in quasi-one-dimensional (Q1D) conductors. It is a kink structure on the angular dependence of interlayer magnetoresistance when the magnetic field is rotated in the most conducting plane. This effect originates from the appear…
Organic and Molecular Conductors Research
Hao Yu、Tetsuya Kaneko、S. Yoshimura 等 6 位作者1996-12-23Applied Physics Letters
A photovoltaic cell with carbonaceous thin film/n-type silicon (C/n-Si) was fabricated utilizing a process in which a carbonaceous thin film was deposited on an n-type silicon substrate by chemical-vapor deposition of 2,5-dimethyl-p-benzoquinone at 500 °C. Under illumination of 15 mW cm−2 light with wavelengths betwee…
Thin-Film Transistor TechnologiesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Gerard C. L. Wong、Jan Commandeur、Hartmut Fischer 等 4 位作者1996-12-23Physical Review Letters
The wetting behavior of hybrid isotropic/smectic block copolymers is examined. For symmetric diblocks, the generic parallel ordering of the lamellae is suppressed, and the copolymer wets the surface with the lamellae perpendicular to the surface. The parallel ordering, however, can be restored in asymmetric lamellar d…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsBlock Copolymer Self-Assembly
А. Shengelaya、Guo‐meng Zhao、H. Keller 等 4 位作者1996-12-23Physical Review Letters
The electron paramagnetic resonance (EPR) signal in the mixed valence perovskite ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3+y}$ was investigated in the paramagnetic regime for ${}^{16}$O and ${}^{18}$O isotope substituted compounds. The characteristic differences observed in EPR intensity and…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsSolid-state spectroscopy and crystallography
S. T. Chui、V. N. Ryzhov1996-12-23arXiv
We show that many two dimensional domain patterns observed in Monte Carlo simulations can be obtained from the many soliton solutions of the imaginary time Sine Gordon equation. This opens the door to analytic physical understanding of the micromagnetics in ultra-thin films.
Materials Sciencecond-mat.stat-mech
Lijuan Jia、Pik-Yin Lai1996-12-22The Journal of Chemical Physics
The kinetics of formation and the structure of an adsorbed layer formed by homopolymer chains irreversibly adsorbed onto a flat wall are studied by Monto Carlo simulation using the bond fluctuation model. The rapid initial adsorption is followed by slow kinetics at later times. The surface coverage can be described by…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Sergey D. Traytak1996-12-22The Journal of Chemical Physics
We consider the steady-state competition between perfectly absorbing sinks distributed uniformly in a spherical region. An equation for the coarse-grained concentration of diffusing particles inside the region is derived following the renormalization group approach. The total flux of diffusing particles, their coarse-…
Material Dynamics and PropertiesTheoretical and Computational PhysicsStochastic processes and statistical mechanics
Jon Baker、Péter Pulay1996-12-22The Journal of Chemical Physics
Using redundant inverse-power distance coordinates we present a series of optimizations on randomly generated argon clusters containing 12, 24, and 48 argon atoms. Our results clearly show that inverse distance coordinates perform significantly better for optimizing the geometries of atomic clusters than either Cartes…
Supramolecular Self-Assembly in MaterialsMachine Learning in Materials ScienceNanocluster Synthesis and Applications
Xiaoping Li、Katharine L. C. Hunt、Janusz Pipin 等 4 位作者1996-12-22The Journal of Chemical Physics
For atoms or molecules of D∞h or higher symmetry, this work gives equations for the long-range, collision-induced changes in the first (Δβ) and second (Δγ) hyperpolarizabilities, complete to order R−7 in the intermolecular separation R for Δβ, and order R−6 for Δγ. The results include nonlinear dipole-induced-dipole (…
Advanced Chemical Physics StudiesNonlinear Optical Materials ResearchThermal Expansion and Ionic Conductivity
Sundaram Balasubramanian、Christopher J. Mundy、Michael L. Klein1996-12-22The Journal of Chemical Physics
The shear viscosity of water at 303.15 K is calculated for the extended simple point charge (SPC/E) model of Berendsen et al. [J. Phys. Chem. 91, 6269 (1987)] using both equilibrium and nonequilibrium molecular dynamics (NEMD) methods. Reciprocal space sums to handle long-range electrostatic forces in a noncubic simul…
Protein Structure and DynamicsMaterial Dynamics and PropertiesSpectroscopy and Quantum Chemical Studies
Ken Bagchi、Sundaram Balasubramanian、Christopher J. Mundy 等 4 位作者1996-12-22The Journal of Chemical Physics
We have devised a reversible set of nonequilibrium molecular dynamics equations of motion to study viscous flow under an applied shear field utilizing a new profile unbiased thermostat (PUT). Based on a modification of the original equations presented by Evans and Morriss [Phys. Rev. Lett. 56, 2172 (1986)], we have ex…
Material Dynamics and PropertiesRheology and Fluid Dynamics StudiesAdvanced Thermodynamics and Statistical Mechanics
George Fytas、Spiros H. Anastasiadis、Rachid Seghrouchni 等 8 位作者1996-12-20Science
Polymer chains attached by one end to an impenetrable surface at high coverage exemplify a tethered layer of mesoscopic dimensions. At equilibrium, thermal fluctuations of the segment density profile of the brushlike layer reflect the tethered chain dynamics; the probing of these fluctuations by evanescent-wave dynami…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsNanofabrication and Lithography Techniques
P. H. M. van Loosdrecht、J. Zeman、G. Martinez 等 6 位作者1996-12-20arXiv
A pressure and temperature dependent Raman study of the vibrational and spin dynamics in CuGeO3 is presented. A new low temperature, high pressure phase has been identified, and a pressure-temperature phase-diagram is proposed for CuGeO3. The pressure dependence of the effective exchange interaction, of the spin-Peier…
Materials ScienceStrongly Correlated Electrons
D. J. Hourston、Franz-Ulrich Sch�fer1996-12-19Journal of Applied Polymer Science
Interpenetrating polymer networks (IPNs) with a controlled degree of microphase separation were synthesized from a poly(ether urethane) (PUR) and poly(ethyl methacrylate) (PEMA). The influence of the crosslink density of both networks was investigated in the 70:30 PUR/PEMA IPN. The extent of damping was evaluated by d…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingPolymer Foaming and Composites
İsmail Tavman1996-12-19Journal of Applied Polymer Science
Thermal conductivity and mechanical properties such as tensile strength, elongation at break, and modulus of elasticity of aluminum powder-filled high-density polyethylene composites are investigated experimentally in the range of filler content 0–33% by volume for thermal conductivity and 0–50% by volume for mechanic…
Polymer Nanocomposites and PropertiesMaterial Properties and ApplicationsAdvanced Theoretical and Applied Studies in Material Sciences and Geometry