Frédéric Hild、Lydia Brelot、Samuel Dagorne2011-09-19Organometallics
The novel N,O,N-supported tetracoordinate amidoaluminum complexes {η 3 ( N, O, N }-(C 5 H 9 )N-C 6 H 4 } 2 OAlNMe 2 ( 2a, R = C 5 H 9; 2b, R = C 6 H 11 ) have been synthesized and structurally characterized. In the solid state, as determined from X-ray crystallographic studies, complex 2a consists of a four-coordinate…
Organometallic Complex Synthesis and Catalysisbiodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysis
Min Yi、Jinzhi Li、Zhigang Shen 等 5 位作者2011-09-19Applied Physics Letters
We prepared mono- and few-layer graphene with micrometer-sized dimensions in aqueous solution by a jet cavitation method starting from common crystal graphite, which is totally green, facile, low-cost, and laborsaving. The graphene yield by our method is estimated as ∼4 wt. % by statistical analysis. Diverse microscop…
Graphene research and applicationsGraphene and Nanomaterials ApplicationsElectrohydrodynamics and Fluid Dynamics
Rani Arielly、Weiming Xu、Eran Greenberg 等 8 位作者2011-09-19Physical Review B
Structural studies of the ferrimagnetic (${T}_{\mathrm{N}}$ = 200 K) Mott insulator GaFeO${}_{3}$ (SG Pc2${}_{1}n$) to 70 GPa, complemented by ${}^{57}$Fe M\"ossbauer spectroscopy and resistance (R) measurements at compression, decompression, and recompression, reveal a fascinating sequence of structures. Starting at…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Tao Wu、Fan Zuo、Le Wang 等 7 位作者2011-09-19Journal of the American Chemical Society
An entirely new type of chalcogenide cluster and a new structural mechanism for the formation of large semiconducting tetrahedral clusters have been revealed as a result of crystallization of a templated indium sulfide consisting of an unprecedented cluster, In(38)S(65), which is the largest supertetrahedral cluster b…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyInorganic Fluorides and Related Compounds
P. Tolédano、D. D. Khalyavin、L. C. Chapon2011-09-19Physical Review B
The unusual magnetoelectric effects observed in the multiferroic phase arising below ${T}_{N}=6.7$ K in Ba${}_{2}$CoGe${}_{2}$O${}_{7}$ (BCG) are related to the spontaneous toroidal moment existing in this compound. The transition to the multiferroic state, which involves spontaneous magnetization, polarization, and t…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Sultan Demirdiş、C. J. van der Beek、Yanina Fasano 等 7 位作者2011-09-19Physical Review B
The interrelation between heterogeneity and flux pinning is studied in Ba(Fe${}_{1\ensuremath{-}x}$Co${}_{x}$)${}_{2}$As${}_{2}$ single crystals with widely varying Co content $x$. Magnetic Bitter decoration of the superconducting vortex ensemble in crystals with $x=0.075$ and $x=0.1$ reveals highly disordered vortex…
Physics of Superconductivity and MagnetismRare-earth and actinide compoundsIron-based superconductors research
Mahlaga Molepo、Daniel P. Joubert2011-09-19Physical Review B
We use first-principles calculations based on density functional theory to study the structural properties and pressure-induced solid-solid phase transitions of ZnO. Both the local-density and the generalized gradient approximations are employed together with the projector augmented wave potentials to mimic the electr…
ZnO doping and propertiesHigh-pressure geophysics and materialsElectronic and Structural Properties of Oxides
Redwan N. Sajjad、Avik W. Ghosh2011-09-19Applied Physics Letters
We demonstrate a way to open a gate-tunable transmission gap across graphene p-n junction by introducing an additional barrier in the middle that replaces Klein tunneling with regular tunneling, allowing us to modulate current by several orders of magnitude. The gap arises by angularly sorting electrons by their longi…
Graphene research and applicationsQuantum and electron transport phenomenaMolecular Junctions and Nanostructures
Alexandros Chremos、Athanassios Z. Panagiotopoulos、Hsiu-Yu Yu 等 4 位作者2011-09-19The Journal of Chemical Physics
The structure of solvent-free oligomer-grafted nanoparticles has been investigated using molecular dynamics simulations and density-functional theory. At low temperatures and moderate to high oligomer lengths, the qualitative features of the core particle pair probability, structure factor, and the oligomer brush conf…
Material Dynamics and PropertiesGranular flow and fluidized bedsElectrostatics and Colloid Interactions
Maciej Skotak、Jorge Ragusa、Daniela Gonzalez 等 4 位作者2011-09-19Biomedical Materials
Gelatin-based nanofibrous scaffolds with a mean fiber diameter of 300 nm were prepared with and without micrometer-sized polyethylene glycol (PEG) fibers that served as sacrificial templates. Upon fabrication of the scaffolds via electrospinning, the gelatin fibers were crosslinked with glutaraldehyde, and the PEG tem…
Electrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative MedicineElectrohydrodynamics and Fluid Dynamics
Marieluise Stumpf、Andreas Spörrer、Hans‐Werner Schmidt 等 4 位作者2011-09-19Journal of Cellular Plastics
Foaming isotactic polypropylene (i-PP) by foam injection molding usually results in inhomogeneous, large cell structures. Possibilities to realize more homogeneous and finer foam morphologies are adjusting processing parameters or adding nucleating agents. Often, inorganic nucleating agents such as talc in concentrati…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Foaming and Composites
Kazutaka Abe、N. W. Ashcroft2011-09-19Physical Review B
High-pressure ground-state phases of crystalline diborane (B${}_{2}$H${}_{6}$) and their stability against decomposition into B and H are investigated by calculations within density-functional theory. Although B${}_{2}$H${}_{6}$ is thermodynamically unstable to phase separation into B and H in the intermediate pressur…
High-pressure geophysics and materialsBoron and Carbon Nanomaterials ResearchSuperconductivity in MgB2 and Alloys
Rui Guo、Lü You、Lang Chen 等 5 位作者2011-09-19Applied Physics Letters
We report the photovoltaic effect of multiferroic BiFeO3 thin films with 109° domains under white light illumination. BiFeO3 thin films that contain well-aligned 109° domains with mainly two polarization variants were prepared by using miscut DyScO3 substrates. We have conduced piezoelectric force microscopy study usi…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsDielectric properties of ceramics
Jeffrey W. Hudgens、John M. Pettibone、Thomas P. Senftle 等 4 位作者2011-09-19Inorganic Chemistry
This report outlines the determination of a reaction mechanism that can be manipulated to develop directed syntheses of gold monolayer-protected clusters (MPCs) prepared by reduction of solutions containing 1,3-bis(diphenylphosphino)propane (L(3)) ligand and Au(PPh(3))Cl. Nanocluster synthesis was initiated by reducti…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Д. П. Козленко、Alexei А. Belik、Α. V. Belushkin 等 7 位作者2011-09-19Physical Review B
The crystal and magnetic structures of BiFeO${}_{3}$ have been studied at high pressures up to 8.6 GPa by means of neutron powder diffraction at ambient temperature. Upon compression, a reduction of the spontaneous ferroelectric polarization is evidenced from the analysis of atomic displacements in the rhombohedral ph…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsSeismic Waves and Analysis
Roel P. A. Dullens、Clemens Bechinger2011-09-19Physical Review Letters
Phenomena such as shear thinning and thickening, occurring when complex materials are exposed to external forces, are generally believed to be closely connected to changes in the microstructure. Here, we establish a direct and quantitative relation between shear thinning in a colloidal crystal and the surface area of…
Material Dynamics and PropertiesForce Microscopy Techniques and ApplicationsPickering emulsions and particle stabilization
Jonas Ø. Hansen、Peipei Huo、Umberto Martinez 等 10 位作者2011-09-19Physical Review Letters
We have studied the interaction of ethanol with reduced TiO(2)(110)-(1 × 1) by high-resolution scanning tunneling microscopy (STM) measurements and density functional theory calculations. The STM data revealed direct evidence for the coexistence of molecularly and dissociatively adsorbed ethanol species on surface Ti…
TiO2 Photocatalysis and Solar CellsCatalytic Processes in Materials ScienceExtraction and Separation Processes
Florian Johann、Alessio Morelli、Daniel Biggemann 等 5 位作者2011-09-19Physical Review B
The influence of both compressive and tensile epitaxial strain along with the electrical boundary conditions on the ferroelastic and ferroelectric domain patterns of bismuth ferrite films was studied. BiFeO${}_{3}$ films were grown on SrTiO${}_{3}$(001), DyScO${}_{3}$(110), GdScO${}_{3}$(110), and SmScO${}_{3}$(110) s…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsDielectric properties of ceramics
H. O. Moser、Carsten Rockstuhl2011-09-19Laser & Photonics Review
Abstract Metamaterials are engineered composite materials offering unprecedented control of wave propagation. Despite their complexity, effective properties can frequently be extracted by conceptualizing them as homogeneous and isotropic media with dispersive electric permittivity and magnetic permeability. For an ide…
Metamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon ResearchPhotonic Crystals and Applications
Pingfan Wu、Panchao Yin、Jin Zhang 等 6 位作者2011-09-19Chemistry - A European Journal
An unprecedented single-side trisalkoxo-substituted Anderson-type polyoxometalate (POM) was synthesized (see scheme). As confirmed by single-crystal X-ray diffraction and IR analyses, the single-side-functionalized Anderson-type POM forms interesting supramolecular assemblies, including dimers and 1D chains.
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions