A. I. Rykov、Y. Ueda、K. Nomura 等 4 位作者2009-03-23arXiv
A-site ordered manganites LnBaMn1.96Fe0.04O5 and LnBaMn1.96Fe0.04O6 are investigated by x-ray full-profile diffraction and Moessbauer spectroscopy. Powder samples were oriented with preferred orientation of platy crystallites in the plane of sample surface. March-Dollase function of preferred orientation was employed…
Strongly Correlated ElectronsMaterials Science
M. Q. Weng、Y. Y. Wang、M. W. Wu2009-03-23arXiv
The spin relaxation time $T_{1}$ in zinc blende GaN quantum dot is investigated for different magnetic field, well width and quantum dot diameter. The spin relaxation caused by the two most important spin relaxation mechanisms in zinc blende semiconductor quantum dots, {i.e.} the electron-phonon scattering in conjunct…
Materials Science
Marco Meibohm、Hans Hermann Otto、Wolfgang Brockner2009-03-23arXiv
This is a representation of the first Raman and IR / FIR spectra for orthorhombic copper polysilicate, CuSiO3, measured at room temperature on polycrystalline samples and a comparison of the optical phonons with those observed for the spin-Peierls compound CuGeO3. CuSiO3 represents a further example of a quasi-one-dim…
Materials Science
Yohei Kota、Tomohiro Takahashi、Hiroki Tsuchiura 等 4 位作者2009-03-23arXiv
The electrical resistivities of Fe-Co alloys owing to random alloy disorder are calculated using the Kubo-Greenwood formula. The obtained electrical esistivities agree well with experimental data quantitatively at low temperature. The spin-polarization of Fe50Co50 estimated from the conductivity (86%) has opposite sig…
Materials ScienceMesoscale and Nanoscale Physics
Navinder Singh2009-03-23arXiv
The present paper is a review of the phenomena related to non-equilibrium electron relaxation in bulk and nano-scale metallic samples. The workable Two-Temperature Model (TTM) based on Boltzmann-Bloch-Peierls (BBP) kinetic equation has been applied to study the ultra-fast(femto-second) electronic relaxation in various…
Materials Sciencecond-mat.stat-mech
Sinisa Coh、David Vanderbilt2009-03-23arXiv
We extend the Berry-phase concept of polarization to insulators having a non-zero value of the Chern invariant. The generalization to such Chern insulators requires special care because of the partial occupation of chiral edge states. We show how the integrated bulk current arising from an adiabatic evolution can be r…
Mesoscale and Nanoscale PhysicsMaterials Science
Leandro M. Malard、Marcos H. D. Guimarães、D. L. Mafra 等 5 位作者2009-03-23Physical Review B
In this work we study the symmetry properties of electrons and phonons in graphene systems as a function of the number of layers. We derive the selection rules for the electron-radiation interactions and for the electron-phonon interactions at all points in the Brillouin zone. By considering these selection rules, we…
Carbon Nanotubes in CompositesFullerene Chemistry and ApplicationsGraphene research and applications
Bin Yan、Lei Liao、Yu‐Meng You 等 9 位作者2009-03-23Advanced Materials
High-aspect-ratio V2O5 nanoribbons are synthesized by thermal vapor deposition technique. Our results reveal that the nanoribbons can serve as effective active optical waveguides. In addition, the observation of strong Raman signals collected at the end of the ribbon indicate that the unique nanostructure could play a…
Transition Metal Oxide NanomaterialsPhotonic and Optical DevicesPorphyrin and Phthalocyanine Chemistry
Virgil Percec、Mohammad R. Imam、Mihai Peterca 等 8 位作者2009-03-23Journal of the American Chemical Society
The synthesis and structural and retrostructural analyses of a library containing 10 triphenylenes functionalized with self-assembling benzyl ether and phenyl propyl ether dendrons are reported. These dendronized triphenylenes adopt a crown rather than discotic conformation. Their crown conformation mediates the self-…
Synthesis and Properties of Aromatic CompoundsDendrimers and Hyperbranched PolymersSupramolecular Self-Assembly in Materials
Tianyou Zhai、Xiaosheng Fang、Yoshio Bando 等 9 位作者2009-03-23ACS Nano
Highly ordered CdS nanostructure arrays were successfully fabricated via a simple two-step metal-organic chemical vapor deposition process. Both stimulated emission and field-emission measurements were carried out in an attempt to understand the correlation between the morphologies, alignments, and emission performanc…
Quantum Dots Synthesis And PropertiesZnO doping and propertiesChalcogenide Semiconductor Thin Films
S. Krohns、P. Lunkenheimer、Ch. Kant 等 8 位作者2009-03-23Applied Physics Letters
The applicability of recently discovered materials with extremely high (“colossal”) dielectric constants, required for future electronics, suffers from the fact that their dielectric constant ε′ only is huge in a limited frequency range below about 1 MHz. In the present report, we show that the dielectric properties o…
Microwave Dielectric Ceramics SynthesisDielectric properties of ceramicsFerroelectric and Piezoelectric Materials
Adela C. Bonoiu、Supriya D. Mahajan、Hong Ding 等 10 位作者2009-03-23Proceedings of the National Academy of Sciences
Drug abuse is a worldwide health concern in which addiction involves activation of the dopaminergic signaling pathway in the brain. Here, we introduce a nanotechnology approach that utilizes gold nanorod-DARPP-32 siRNA complexes (nanoplexes) that target this dopaminergic signaling pathway in the brain. The shift in th…
Advanced biosensing and bioanalysis techniquesGold and Silver Nanoparticles Synthesis and ApplicationsRNA Interference and Gene Delivery
Martín Baron、Олександр Бондарчук、Darı́o Stacchiola 等 5 位作者2009-03-23The Journal of Physical Chemistry C
Morphology, electronic structure, and CO adsorption of gold supported on well-ordered CeO 2 (111) thin films and CeO x nanoparticles were studied by scanning tunneling microscopy (STM), photoelectron spectroscopy (XPS), and infrared reflection absorption spectroscopy (IRAS). Ceria nanoparticles grown on crystalline th…
Catalysis and Oxidation ReactionsCatalytic Processes in Materials ScienceGas Sensing Nanomaterials and Sensors
Taketoshi Minato、Yasuyuki Sainoo、Yousoo Kim 等 15 位作者2009-03-23The Journal of Chemical Physics
Introducing a charge into a solid such as a metal oxide through chemical, electrical, or optical means can dramatically change its chemical or physical properties. To minimize its free energy, a lattice will distort in a material specific way to accommodate (screen) the Coulomb and exchange interactions presented by t…
Catalytic Processes in Materials ScienceElectronic and Structural Properties of OxidesSemiconductor materials and devices
Ying‐Hao Chu、Qing He、Chan‐Ho Yang 等 7 位作者2009-03-23Nano Letters
We demonstrate an approach to create a one-dimensional nanoscale array of domain walls in epitaxial La-substituted BiFeO(3) films. We have used a DyScO(3) (110)(O) single-crystal substrate to provide an anisotropic strain to exclude two of the possible structural variants. Furthermore, through careful control of elect…
Multiferroics and related materialsFerroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materials
Takahide Kubota、Sumito Tsunegi、Mikihiko Oogane 等 7 位作者2009-03-23Applied Physics Letters
Transport properties in magnetic tunnel junctions (MTJs) with Co2FexMn1−xSi (CFMS, x=0–1.0)/Al–O/Co75Fe25 structure and Gilbert damping constant in the epitaxial CFMS films were investigated. The tunnel magnetoresistance ratio is as high as 75% in MTJs with x=0.6 at room temperature. The Gilbert damping constant is mi…
Magnetic properties of thin filmsMXene and MAX Phase MaterialsHeusler alloys: electronic and magnetic properties
Xun Shi、Fengli Huang、Min Liu 等 4 位作者2009-03-23Applied Physics Letters
It is usually accepted that good thermoelectric (TE) materials should be narrow-gap semiconductors. Here we show an example that the tetrahedrally bonded stannite compound Cu2ZnSnSe4 with a band gap of 1.44 eV can also exhibit a high figure of merit at intermediate temperature. The highly distorted structure strives f…
Perovskite Materials and ApplicationsAdvanced Thermoelectric Materials and DevicesChalcogenide Semiconductor Thin Films
Luca de’ Medici、S. R. Hassan、Massimo Capone 等 4 位作者2009-03-23Physical Review Letters
We outline a general mechanism for orbital-selective Mott transition, the coexistence of both itinerant and localized conduction electrons, and show how it can take place in a wide range of realistic situations, even for bands of identical width and correlation, provided a crystal field splits the energy levels in man…
Rare-earth and actinide compoundsPhysics of Superconductivity and MagnetismIron-based superconductors research
Tamar Kaully、Keren Kaufman‐Francis、Ayelet Lesman 等 4 位作者2009-03-23OpenAlex
Long-term viability of thick three-dimensional engineered tissue constructs is a major challenge. Addressing it requires development of vessel-like network that will allow the survival of the construct in vitro and its integration in vivo owing to improved vascularization after implantation. Resulting from work of var…
Electrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative Medicine3D Printing in Biomedical Research
Janardhan Rao Saithala、Stephen McCoy、Andrew Houghton 等 5 位作者2009-03-22OpenAlex
Abstract Pitting potentials (Ep) of super duplex stainless steel (SDSS) grade (UNS S32760) were determined using potentiodynamic polarization methods. The effect of chloride concentration on Ep was determined at 130°C in an autoclave at various chloride ppm levels (15, 100, 1000, 10000) for UNS S32760. This study also…
Non-Destructive Testing TechniquesCorrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metals