Gianluca Paglia、Andrew L. Rohl、Craig E. Buckley 等 4 位作者2005-06-28Physical Review B
We have performed an extensive computational study of $\ensuremath{\gamma}\text{\ensuremath{-}}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}$, beginning with the geometric analysis of approximately 1.47 billion spinel-based structural candidates, followed by derivative method energy minimization calculations of approximately 122…
X-ray Diffraction in CrystallographyNuclear materials and radiation effectsCrystal Structures and Properties
Huiru Gu、Xiao Di Su、Kian Ping Loh2005-06-28The Journal of Physical Chemistry B
The impedimetric sensing of DNA hybridization on polyaniline/polyacrylate (PANI/PAA)-modified boron-doped diamond (BDD) electrode has been investigated. An ultrathin film of PANI-PAA copolymer was electropolymerized onto the diamond surfaces to provide carboxylic groups for tethering to DNA sensing probes. The electro…
Analytical Chemistry and SensorsConducting polymers and applicationsElectrochemical sensors and biosensors
Matthew L. Wallace、Bela Joos2005-06-28arXiv
A phenomenon recently coined as ``overaging'' implies a slowdown in the collective (slow) relaxation modes of a glass when a transient shear strain is imposed. We are able to reproduce this behavior in simulations of a supercooled polymer melt by imposing instantaneous shear deformations. The increases in relaxation t…
Soft Condensed MatterMaterials Science
Vassiliy Lubchenko、Robert J. Silbey、Peter G. Wolynes2005-06-28arXiv
Amorphous solids exhibit intrinsic, local structural transitions, that give rise to the well known quantum-mechanical two-level systems at low temperatures. We explain the microscopic origin of the electric dipole moment of these two-level systems: The dipole emerges as a result of polarization fluctuations between ne…
cond-mat.dis-nnMaterials Science
Igor Zutic、Igor Mazin2005-06-28arXiv
Exotic superconducting properties of Sr$_{2}$RuO$_{4}$ have provided strong support for an unconventional pairing symmetry. However, the extensive efforts over the past decade have not yet unambiguously resolved the controversy about the pairing symmetry in this material. While recent phase-sensitive experiments using…
Materials ScienceSuperconductivity
Jae‐Hyung Jang、Christopher B. Rives、Lonnie D. Shea2005-06-28Molecular Therapy
Tissue engineering scaffolds capable of sustained plasmid release can promote gene transfer locally and stimulate new tissue formation. We have investigated the scaffold design parameters that influence the extent and duration of transgene expression and have characterized the distribution of transfected cells. Porous…
Electrospun Nanofibers in Biomedical ApplicationsRNA Interference and Gene DeliveryTissue Engineering and Regenerative Medicine
Smaı̈l Triki、Carlos J. Gómez‐García、Eliseo Ruíz 等 4 位作者2005-06-28Inorganic Chemistry
Reaction of NaN(3) with the [Cu(II)(tn)](2+) ion (tn = 1,3-diaminopropane) in basic aqueous solution yields the azido-bridged complex of formula [Cu(2)(tn)(2)(N(3))(4)] (1), which is characterized by X-ray crystallography. The structure of 1 is made up of dinuclear neutral complexes, of formula [Cu(2)(tn)(2)(N(3))(4)]…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchMolecular Junctions and Nanostructures
I. Afek、Eran Bouchbinder、Eytan Katzav 等 5 位作者2005-06-28Physical Review E
Slow crack propagation in ductile, and in certain brittle materials, appears to take place via the nucleation of voids ahead of the crack tip due to plastic yields, followed by the coalescence of these voids. Postmortem analysis of the resulting fracture surfaces of ductile and brittle materials on the microm-mm and t…
Microstructure and mechanical propertiesMetal Forming Simulation TechniquesNumerical methods in engineering
James P. Sethna、Karin A. Dahmen、Olga Perkovic2005-06-28arXiv
This is a review article of our work on hysteresis, avalanches, and criticality. We provide an extensive introduction to scaling and renormalization--group ideas, and discuss analytical and numerical results for size distributions, correlation functions, magnetization, avalanche durations and average avalanche shapes,…
Materials Science
Tae Y. Choi、Dimos Poulikakos、Joy Tharian 等 4 位作者2005-06-28Applied Physics Letters
The thermal conductivity of individual multiwalled carbon nanotubes (outer diameter of ∼45nm) was obtained by employing the 3-ω method. To this end, the third-harmonic amplitude as a response to the applied alternate current at fundamental frequency (ω) is expressed in terms of thermal conductivity. A microfabricated…
Carbon Nanotubes in CompositesThermal properties of materialsGraphene research and applications
Navid B. Saleh、Traian Sârbu、Kevin Sirk 等 6 位作者2005-06-28Langmuir
Fully sulfonated poly(styrenesulfonate) brushes were grown from the surface of colloidal silica particles and used to prepare stable trichloroethylene-in-water and heptane-in-water Pickering emulsions. These particles were highly charged and colloidally stable in water but could not be dispersed in trichloroethylene o…
Polymer Surface Interaction StudiesPickering emulsions and particle stabilizationSurfactants and Colloidal Systems
P.J. Moore、I.E. Portugues、Ian Glover2005-06-28IEEE Transactions on Power Delivery
Partial discharges (PD) generate wideband radio frequency interference and, consequently, can be detected using radio receiving equipment. Due to the advances in ultra-high-speed sampling equipment, it is possible to accurately measure the propagation of the PD wavefront as it passes through a 4 element antenna array.…
Ultra-Wideband Communications TechnologyHigh voltage insulation and dielectric phenomenaLightning and Electromagnetic Phenomena
A. M. Nazmul、Tomohiro Amemiya、Yusuke Shuto 等 5 位作者2005-06-28Physical Review Letters
We show that suitably designed magnetic semiconductor heterostructures consisting of Mn delta (delta)-doped GaAs and p-type AlGaAs layers, in which the locally high concentration of magnetic moments of Mn atoms are controllably overlapped with the two-dimensional hole gas wave function, realized remarkably high ferrom…
Magnetic and transport properties of perovskites and related materialsZnO doping and propertiesPhysics of Superconductivity and Magnetism
Jung Yeop Lee、Jaewon Park、Jun‐Hyung Cho2005-06-28Applied Physics Letters
We present first-principles density-functional calculations for the electronic properties of nitrogen(N)-doped as well as carbon(C)-doped titanium dioxide (TiO2). We find that the bands originating from N (C) 2p states appear in the band gap of TiO2, but the mixing of N (C) with O2p states is too weak to produce a sig…
TiO2 Photocatalysis and Solar CellsTransition Metal Oxide NanomaterialsElectronic and Structural Properties of Oxides
Emilia Evangelio、Daniel Ruiz‐Molina2005-06-28OpenAlex
Abstract Valence tautomeric complexes combine redox‐active ligands and transition metal ions with two or more accessible oxidation states, exhibiting two nearly degenerated electronic states with localized electronic structures. Charge distribution in such electronic isomers has an appreciable sensitivity to the envir…
Magnetism in coordination complexesMetal complexes synthesis and propertiesPorphyrin and Phthalocyanine Chemistry
Mingfu Zhang、Axel H. E. Müller2005-06-28OpenAlex
Abstract In recent years, research on cylindrical polymer brushes (or molecular bottlebrushes) has received significant attention. In this article, we discuss various strategies for their synthesis and the unique properties arising from their regular multibranched structure. Some recent advances in the application of…
Force Microscopy Techniques and ApplicationsPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
Javier Aizpurua、Garnett W. Bryant、Lee J. Richter 等 6 位作者2005-06-28OpenAlex
The optical properties of coupled metallic nanorods are studied to investigate the use of coupled plasmonic structures in field-enhanced spectroscopies. Light scattering by coupled nanorods is calculated with the boundary element method, including retardation. The modes of coupled nanorod systems are calculated by the…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchSpectroscopy and Quantum Chemical Studies
Chad E. Talley、Joseph Jackson、Chris Oubre 等 9 位作者2005-06-28OpenAlex
Surface-enhanced Raman scattering (SERS) intensities for individual Au nanospheres, nanoshells, and nanosphere and nanoshell dimers coated with nonresonant molecules are measured, where the precise nanoscale geometry of each monomer and dimer is identified through in situ atomic force microscopy. The observed intensit…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNanocluster Synthesis and Applications
Hong Wu、Shaoyun Guo、Zhen Li2005-06-27Journal of Polymer Science Part B Polymer Physics
Abstract In this work, the effect of ultrasonic irradiation on molecular structure development of metallocene‐catalyzed linear low density polyethylene (mLLDPE) was studied. GPC results show that ultrasonic irradiation have influence on molecular weight and molecular weight distribution of mLLDPE. Molecular weight of…
Polymer Science and PVCPolymer crystallization and propertiesPolymer composites and self-healing
Glauciane do Nascimento Barbosa、Carlos F. O. Graeff、Herenilton Paulino Oliveira2005-06-27Eclética Química
The effect of water molecules on the conductivity and electrochemical properties of vanadiumpentoxide xerogel was studied in connection with changes of morphology upon thermal annealing atdifferent temperatures. It was demonstrated that the conductivity was increased for the samples heated at150 o C and 270 o C compar…
Catalysis and Oxidation ReactionsTransition Metal Oxide NanomaterialsGas Sensing Nanomaterials and Sensors