Yefei Feng、Xiaoyu Yang、Yan Di 等 6 位作者2006-06-29The Journal of Physical Chemistry B
Mesoporous silica materials (HS-JLU-20) with an extremely high content of mercaptopropyl groups have been successfully synthesized using fluorocarbon-hydrocarbon surfactant mixtures through a simple co-condensation approach of tetraethyl orthosilicate (TEOS) and (3-mercaptopropyl)trimethoxysilane (MPTS), which are cha…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisPolyoxometalates: Synthesis and Applications
作者信息未提供2006-06-29Materials Today
Recent developments in fullerenes, nanotubes, nanodiamond, and carbon fibers are reviewed.Contributions by different authors are grouped into three sections on the synthesis, chemistry and physics, and device applications of these carbon nanomaterials.As well as covering the materials chemistry from the fundamental an…
Carbon Nanotubes in CompositesNanotechnology research and applications
Ren‐Hua Jin、Jianjun Yuan2006-06-29Chemistry of Materials
The formation of shaped silicas directed by a star poly(ethyleneimine) ( sPEI4 − 200, with benzene core, four arms, and 200 repeated units per arm) was reported. The resulting silicas were characterized with scanning electronic microscope, optical/fluorescence microscope, and UV−vis and fluorescence spectrometers. We…
Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistryDendrimers and Hyperbranched Polymers
Cristian Pantea、A. Migliori、P. B. Littlewood 等 9 位作者2006-06-29Physical Review B
The elastic tensor of monocrystalline ${\mathrm{ZrW}}_{2}{\mathrm{O}}_{8}$ was determined near $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ as a function of pressure, using pulse-echo ultrasound in a large-volume moissanite anvil cell. An unusual decrease in bulk modulus with increased pressure was observed. A framework…
High-pressure geophysics and materialsSolid-state spectroscopy and crystallographyThermal Expansion and Ionic Conductivity
Yu‐Chih Tseng、K. Phoa、David Carlton 等 4 位作者2006-06-29Nano Letters
A study involving a large number of carbon nanotube transistors reveals that the nanotube diameter and the metal contact material play key roles in determining the on- and off-state currents of these devices. The results are discussed in terms of the Schottky barrier at the metal-semiconductor junction and the variati…
Carbon Nanotubes in CompositesGraphene research and applicationsNanotechnology research and applications
Omar Azzaroni、Zijian Zheng、Zhongqiang Yang 等 4 位作者2006-06-29Langmuir
Ion-exchange in surface-initiated polyelectrolyte brushes provides a versatile route to the formation of catalytically active surfaces for electroless deposition of Cu. The advantage of this procedure is the covalent anchoring of the catalyst support layer, eliminating delamination of the metal film, even when deposit…
Polymer Surface Interaction StudiesMolecular Junctions and NanostructuresNanofabrication and Lithography Techniques
Lucia Flamigni、Etienne Baranoff、Jean‐Paul Collin 等 4 位作者2006-06-29Chemistry - A European Journal
A triad D-Ir-A, where Ir is an Ir(III) bisterpyridine complex connected through an amidophenyl spacer to D, a triphenylamine electron donor, and to A, a naphthalene bisimide electron acceptor, has been synthesized and electrochemically investigated. The photoinduced processes in the triad, which is more than 4-nm long…
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes
Steven M. Valone、M. I. Baskes、R. L. Martin2006-06-29Physical Review B
The varying thermodynamic stability of gallium- (Ga-) stabilized plutonium (Pu) alloys with temperature affords a unique setting for the development of self-irradiation damage. Here, fundamental characteristics of helium (He) bubbles in these alloys with respect to temperature, gallium concentration, and He-to-vacancy…
Fusion materials and technologiesNuclear Materials and PropertiesNuclear materials and radiation effects
Qianku Hu、Qinghua Wu、Yanming Ma 等 9 位作者2006-06-29Physical Review B
Structural and electronic properties for seven possible stacking configurations in hexagonal $\mathrm{B}{\mathrm{C}}_{5}$ based on hexagonal BN and graphite structures have been studied using the ab initio pseudopotential density functional method within the local density approximation. From the total energies, struct…
Graphene research and applicationsBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
Tsutomu Watanabe、Hisatoshi Yokoyama、Yukio Tanaka 等 4 位作者2006-06-29Journal of the Physical Society of Japan
A half-filled-band Hubbard model on an anisotropic triangular lattice (t in two bond directions and t' in the other) is studied using an optimization variational Monte Carlo method, to consider the Mott transition and superconductivity arising in \kappa-BEDT-TTF_2X. Adopting wave functions with doublon-holon binding f…
Physics of Superconductivity and MagnetismMagnetism in coordination complexesOrganic and Molecular Conductors Research
A. Dı́az-Ortiz、Ralf Drautz、M. Fähnle 等 5 位作者2006-06-29Physical Review B
The ordering and magnetic properties of bcc-based iron-cobalt alloys have been investigated as a function of the atomic composition. The different states of ordering in $\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Co}$ alloys, from the fully ordered to the disordered state, and their effect on the atomic volume, the magne…
Magnetic properties of thin filmsMicrostructure and mechanical propertiesMicrostructure and Mechanical Properties of Steels
Chenyu Wei2006-06-29Nano Letters
Temperature-dependent conformations of linear polymer molecules adsorbed at carbon nanotube (CNT) interfaces are investigated through molecule dynamics simulations. Model polyethylene (PE) molecules are shown to have selective conformations on the CNT surface, controlled by atomic structures of the CNT lattice and geo…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsNanopore and Nanochannel Transport Studies
Andrew D. Sommers、Anthony M. Jacobi2006-06-29Journal of Micromechanics and Microengineering
A technique for fabricating micropatterned aluminum surfaces with parallel grooves 30 µm wide and tens of microns in depth is described. Standard photolithographic techniques are used to obtain this precise surface-feature patterning. Positive photoresists, S1813 and AZ4620, are selected to mask the surface, and a mix…
Surface Modification and SuperhydrophobicityFluid Dynamics and Heat TransferNanomaterials and Printing Technologies
Poulomi Roy、Suneel Kumar Srivastava2006-06-29Crystal Growth & Design
CuS nanowires have been successfully prepared from Cu−dithiooxamide, a novel single-source precursor, by a hydrothermal method at 120 °C for 24 h. The nanowires are 40−80 nm in diameter and up to a few microns long, and a possible reaction mechanism of their formation is proposed. The effects of reaction temperature,…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applications
J. M. Pitarke、L. Constantin、J. P. Perdew2006-06-29arXiv
We report the first three-dimensional wavevector analysis of the jellium exchange-correlation (xc) surface energy in the random-phase approximation (RPA). The RPA accurately describes long-range xc effects which are challenging for semi-local approximations, since it includes the universal small-wavevector behavior de…
Materials Science
Igor L Kuskovsky、W. MacDonald、A. O. Govorov 等 8 位作者2006-06-29arXiv
Excitons in vertically stacked type-II quantum dots experience the topological magnetic phase and demonstrate the Aharonov-Bohm oscillations in the emission intensity. Photoluminescence of vertically stacked ZnTe/ZnSe quantum dots is measured in magnetic fields up to 31 T. The Aharonov-Bohm oscillations are found in t…
Mesoscale and Nanoscale PhysicsMaterials Science
Liliana Viciu、Q. Huang、R. J. Cava2006-06-29Physical Review B
The crystal structure and oxygen stoichiometry in two-layer ${\mathrm{Na}}_{0.74}\mathrm{Co}{\mathrm{O}}_{2}$ and ${\mathrm{Na}}_{0.38}\mathrm{Co}{\mathrm{O}}_{2}$ at room temperature are analyzed by powder neutron diffraction. Two sets of diffraction data for each sample, taken at different incident neutron wavelengt…
Advanced Thermoelectric Materials and DevicesMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Roger J. Davey、Geoffrey Dent、R. K. Mughal 等 4 位作者2006-06-29Crystal Growth & Design
Little is known concerning the precise molecular pathway that links fluid-phase molecules to those in nascent crystal nuclei. In this paper the process of molecular self-assembly has been studied in concentrated solutions using FTIR spectroscopy. Three carboxylic acids, benzoic, tetrolic, and mandelic acids, have been…
Crystallography and molecular interactionsSpectroscopy and Quantum Chemical StudiesCrystallization and Solubility Studies
P. Foldi、M. G. Benedict、J. M. Pereira 等 4 位作者2006-06-29arXiv
The time evolution of the magnetization of a magnetic molecular crystal is obtained in an external time-dependent magnetic field, with sweep rates in the kT/s range. We present the 'exact numerical' solution of the time dependent Schrödinger equation, and show that the steps in the hysteresis curve can be described as…
Mesoscale and Nanoscale PhysicsMaterials Science
I. Abou Hamad、D. T. Robb、P. A. Rikvold2006-06-29arXiv
The first-order reversal curve (FORC) method for analysis of systems undergoing hysteresis is applied to dynamical models of electrochemical adsorption. In this setting, the method can not only differentiate between discontinuous and continuous phase transitions, but can also quite accurately recover equilibrium behav…
Materials Science