Gamil A. Guirgis、P. Klaboe、Shiyu Shen 等 10 位作者2003-03-31Journal of Raman Spectroscopy
Abstract The Raman spectrum of liquid ethyldibromosilane, CH 3 CH 2 SiHBr 2 , was recorded at various temperatures between 298 and 218 K, and the spectrum of the crystal was obtained at 210 K from a sample sealed in a capillary. Additional spectra of the amorphous and annealed crystals, which were deposited on a coppe…
Nonlinear Optical Materials ResearchSolid-state spectroscopy and crystallographyMolecular spectroscopy and chirality
Bin Ding、Hak Yong Kim、Chulki Kim 等 5 位作者2003-03-31Nanotechnology
Nanofibres of TiO 2 –SiO 2 (Ti:Si = 50: 50 mol%) with diameters of 50–400 nm were prepared by calcining electrospun nanofibres of polyvinyl acetate (PVac)/titania–silica composite as precursor. These PVac/titania–silica hybrid nanofibres were obtained from a homogenous solution of PVac with a sol–gel of titanium isopr…
Conducting polymers and applicationsElectrospun Nanofibers in Biomedical ApplicationsElectrohydrodynamics and Fluid Dynamics
Nguyen H. Phuong、Friederike Schmid2003-03-31arXiv
By computer simulations of systems of ellipsoids, we study the influence of the isotropic/nematic phase transition on the direct correlation functions (DCF) in anisotropic fluids. The DCF is determined from the pair distribution function by solving the full Ornstein-Zernike equation, without any approximations. Using…
Materials ScienceSoft Condensed Mattercond-mat.stat-mech
P. Samuely、Z. Holanova、P. Szabo 等 7 位作者2003-03-31arXiv
The Andreev reflection measurements of the superconducting energy gap in the carbon-substituted MgB$_2$ are presented. Despite the strong suppression of the transition temperature by 17 K in comparison with the pure MgB$_2$, the same reduced value of the small superconducting energy gap with $2Δ/kT_c \approx$ 1.7 has…
Materials ScienceSuperconductivity
Lazaros K. Gallos、Bijan Movaghar、Laurens D. A. Siebbeles2003-03-31arXiv
The many-body Monte Carlo method is used to evaluate the frequency dependent conductivity and the average mobility of a system of hopping charges, electronic or ionic on a one-dimensional chain or channel of finite length. Two cases are considered: the chain is connected to electrodes and in the other case the chain i…
Materials Sciencecond-mat.stat-mech
J.C. de Lima、D. Raoux、J. M. Tonnerre 等 8 位作者2003-03-31Physical review. B, Condensed matter
The local atomic structure of an amorphous ${\mathrm{NiZr}}_{2}$ alloy was investigated using the anomalous wide-angle x-ray scattering (AWAXS), differential anomalous scattering, and reverse Monte Carlo (RMC) simulations techniques. The AWAXS measurements were performed at eight different incident photon energies, in…
X-ray Spectroscopy and Fluorescence AnalysisX-ray Diffraction in CrystallographyThermodynamic and Structural Properties of Metals and Alloys
Congwu Cui、Trevor A. Tyson、Zhong Zhong 等 5 位作者2003-03-31arXiv
The pressure dependence of the resistivity and structure of La0.60Y0.07Ca0.33MnO3 has been explored in the pressure range from 1 atm to ~7 GPa. The metal to insulator transition temperature (TMI) was found to reach a maximum and the resistivity achieves a minimum at ~3.8 GPa. Beyond this pressure, TMI is reduced with…
Materials ScienceStrongly Correlated Electrons
Calin Buia、Alper Buldum、Jian Ping Lu2003-03-31Physical review. B, Condensed matter
Quantum interference has dramatic effects on electronic transport through nanotube contacts. In optimal configuration the intertube conductance can approach that of a perfect nanotube ${(4e}^{2}/h).$ The maximum conductance increases rapidly with the contact length up to 10 nm, beyond which it exhibits long-wavelength…
Carbon Nanotubes in CompositesGraphene research and applicationsMechanical and Optical Resonators
Daniele Varsano、M. A. L. Marques、Angel Rubio2003-03-31arXiv
We present calculations on energy- and time-resolved two-photon photoemission spectra of images states in Cu(100) and Cu(111) surfaces. The surface is modeled by a 1D effective potential and the states are propagated within a real-space, real-time method. To obtain the energy resolved spectra we employ a geometrical a…
Materials Science
Horng‐Tay Jeng、G. Y. Guo2003-03-31Physical review. B, Condensed matter
The electronic structures and magnetic properties of double perovskites ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6},$ ${\mathrm{Sr}}_{2}{\mathrm{FeReO}}_{6},$ and ${\mathrm{Sr}}_{2}{\mathrm{CrWO}}_{6}$ have been studied by using the full-potential linear muffin-tin orbital method within the local-spin-density approximation…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
O. Chmaissem、B. Dąbrowski、S. Koleśnik 等 6 位作者2003-03-31Physical review. B, Condensed matter
The nuclear and magnetic structures and properties of ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ with $0.45<~x<~1$ and ${\mathrm{Pr}}_{1\ensuremath{-}y}{\mathrm{Sr}}_{y}{\mathrm{MnO}}_{3}$ $(0.58<~y<~1)$ were investigated using neutron powder diffraction, resistivity and magnetic…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
S. O. Kucheyev、J. S. Williams、C. Jagadish 等 7 位作者2003-03-31Physical review. B, Condensed matter
We study the evolution of lattice defects in single-crystal ZnO bombarded with 60-keV ${}^{28}\mathrm{Si}$ and 300-keV ${}^{197}\mathrm{Au}$ ions at 77 and 300 K. To characterize ion-beam-produced structural defects, we use a combination of Rutherford backscattering/channeling (RBS/C) spectrometry, cross-sectional tra…
ZnO doping and propertiesIon-surface interactions and analysisGa2O3 and related materials
K. B. K. Teo、Chandan Singh、Manish Chhowalla 等 4 位作者2003-03-30Cambridge University Engineering Department Publications Database
Carbon nanotubes and nanofibers are graphitic filaments/whiskers with diameters ranging from 0.4 to 500 nm and lengths in the range of several micrometers to millimeters. Carbon nanofibers and nanotubes are grown by the diffusion of carbon (via catalytic decomposition of carbon containing gases or vaporized carbon fro…
Carbon Nanotubes in CompositesGraphene research and applicationsFiber-reinforced polymer composites
Scott M. Woodley、Peter D. Battle、Julian D. Gale 等 4 位作者2003-03-29Chemistry of Materials
Static lattice simulation techniques are applied to modeling the structures of the lanthanide manganates (LnMnO 3 ). New interatomic potentials are developed based on the Born model of the ionic solid supplemented by the angular overlap model to describe the nonspherical components of the Mn 3+ −O 2 - interactions. Th…
Magnetic and transport properties of perovskites and related materialsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Takahiro Sato、Toshiyuki Shimizu、Fumio Kasabo 等 4 位作者2003-03-29Macromolecules
The isotropic−cholesteric phase boundary concentrations and interfacial tension were measured for tetrahydrofuran (THF) solutions of fractionated cellulose tris(phenyl carbamate) (CTC) samples. The phase boundary concentrations are compared with the scaled particle theory for the hard wormlike spherocylinder model as…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Chiara DˈAmbrosio、Fabio Talamo、Rosa Maria Vitale 等 7 位作者2003-03-29Biochemistry
Aminoacylase 1 is a zinc-binding metalloprotease catalyzing the hydrolysis of N(alpha)-acylated l-amino acids; it presents altered expression levels in different renal and small cell lung carcinomas. A description of its redox and oligomerization state was achieved by combined biochemical and mass spectrometric proced…
Protein Structure and DynamicsMass Spectrometry Techniques and ApplicationsEnzyme Structure and Function
Yi Chen、De X. Zeng、Mei Gong Fan2003-03-29Organic Letters
A novel synthetic route to symmetric and nonsymmetric dithienylethene derivatives with a 2,5-dihydrothiophene bridging unit was described. A class of new functional photochromic compounds was prepared and showed photochromic properties similar to those of known diarylethenes. [reaction: see text]
Porphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence ChemistryOrganic Chemistry Cycloaddition Reactions
Spomenka Simović、Clive A. Prestidge2003-03-29Langmuir
The adsorption behavior of hydrophilic silica nanoparticles (fumed Aerosil 380) at the polydimethylsiloxane (PDMS) droplet−water interface has been investigated through particle adsorption isotherms, with complementary studies of the adsorbed layer structure by freeze−fracture SEM. The influence of solution conditions…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesPickering emulsions and particle stabilization
Jinhan Cho、Frank Caruso2003-03-29Macromolecules
Deconstructible polymeric films have potential applications in the areas of drug delivery, patterning, and membrane science. Here, we report on the preparation of heterogeneous multilayer films comprising alternate stacks of hydrogen-bonded (poly(4-vinylpyridine) (P4VP) and poly(acrylic acid, sodium salt) (PAA)) and e…
Surface Modification and SuperhydrophobicityPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
Dimiter N. Petsev、Xioxia Wu、Oleg Galkin 等 4 位作者2003-03-29The Journal of Physical Chemistry B
For insight into the thermodynamics and phase behavior in concentrated protein solutions, we study the liquid−liquid phase separation with lysozyme. We determine independently the binodal and spinodal lines, and the second virial coefficient of the protein at 275 < T < 295 K. From these data, we determine the protein…
Phase Equilibria and ThermodynamicsProteins in Food SystemsMaterial Dynamics and Properties