Ignacio Lopez‐Salido、Dong Chan Lim、Rainer Dietsche 等 5 位作者2005-12-16The Journal of Physical Chemistry B
Au nanoparticles grown on mildly sputtered Highly Ordered Pyrolytic Graphite (HOPG) surfaces were studied using Scanning Tunneling Microscopy (STM) and X-ray Photoelectron Spectroscopy (XPS). The results were compared with those of Ag nanoparticles on the same substrate. By varying the defect densities of HOPG and the…
Electrocatalysts for Energy ConversionGraphene research and applicationsCatalytic Processes in Materials Science
Tienchong Chang、Jingyan Geng、Xingming Guo2005-12-16Applied Physics Letters
An analytical molecular mechanics model is established to relate the chirality- and size-dependent elastic properties of a single-walled carbon nanotube to its atomic structure. Properties at different length scales are directly connected by the derived closed-form expressions. The effects of tube chirality and tube d…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research
Min Yang、K. B. K. Teo、W. I. Milne 等 4 位作者2005-12-16Applied Physics Letters
We demonstrate the fabrication and operation of a carbon nanotube (CNT) based Schottky diode by using a Pd contact (high-work-function metal) and an Al contact (low-work-function metal) at the two ends of a single-wall CNT. We show that it is possible to tune the rectification current-voltage (I-V) characteristics of…
Carbon Nanotubes in CompositesGraphene research and applicationsMechanical and Optical Resonators
Manuela Berna、Daniele Dalzoppo、Gianfranco Pasut 等 8 位作者2005-12-16Biomacromolecules
Dendrimers, dendrons, and hyperbranched polymers are gaining popularity as novel drugs, imaging agents, and drug delivery systems. They present advantages of well-defined molecular weight, multivalent surfaces, and high drug carrying capacity. Moreover, it is emerging that such architectures can display unique endocyt…
Nanoparticle-Based Drug DeliveryRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers
Eisuke Abe、Akira Fujimoto、Junichi Isoya 等 5 位作者2005-12-16arXiv
Phosphorus-doped silicon single crystals with 0.19 % <= f <= 99.2 %, where f is the concentration of 29^Si isotopes, are measured at 8 K using a pulsed electron spin resonance technique, thereby the effect of environmental 29^Si nuclear spins on the donor electron spin is systematically studied. The linewidth as a fun…
Materials Sciencequant-ph
Maurice de Koning、Alex Antonelli、Antonio J. R. da Silva 等 4 位作者2005-12-16arXiv
We present a first-principles study of the structure and energetics of Bjerrum defects in ice Ih and compare the results to experimental electrical conductivity data. While the DFT result for the activation energy is in good agreement with experiment, we find that its two components have quite different values. Aside…
Materials Science
Igor S. Nefedov、Ari J. Viitanen、Sergei Tretyakov2005-12-16Physical Review B
Plane-wave reflection and refraction at an interface with a double-wire medium is considered. The problem of additional boundary conditions (ABC) in application to wire media is discussed and an ABC-free approach, known in the solid state physics, is used. Expressions for the fields and Poynting vectors of the refract…
Metamaterials and Metasurfaces ApplicationsElectromagnetic Scattering and AnalysisAdvanced Antenna and Metasurface Technologies
Lindsay E. Roy、Timothy Hughbanks2005-12-16Journal of the American Chemical Society
A spin density functional (SDFT) study of carboxylate-bridged and diazenido-bridged dinuclear gadolinium compounds is presented. Calculated magnetic coupling constants for the carboxylate-bridged structures are in good agreement with experimental data, confirming the ability of the broken symmetry approach used in thi…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesInorganic Chemistry and Materials
R. Stahl、Christoph Lambert、Conrad Kaiser 等 5 位作者2005-12-16Chemistry - A European Journal
We synthesized a series of amino substituted triarylboranes (TABs) 1-3 by copper(I)-catalyzed cross-coupling reactions. The title compounds were investigated by means of cyclic voltammetry (CV) and UV-visible absorption and fluorescence spectroscopy. Electrochemical oxidation of tris(4-carbazolyl-2,6-dimethylphenyl)bo…
Organic Light-Emitting Diodes ResearchConducting polymers and applicationsLuminescence and Fluorescent Materials
Victor Pryamitsyn、Venkat Ganesan2005-12-16Macromolecules
We use computer simulations to study the mechanisms governing the linear viscoelasticity behavior of composites of spherical nanofillers dispersed in polymer melt matrices. Our results suggest that particles can influence the viscoelastic properties of the system by a variety of different mechanisms. On one hand, the…
Material Dynamics and PropertiesPolymer Nanocomposites and PropertiesComposite Material Mechanics
Edwin H. A. Beckers、Stefan C. J. Meskers、Albertus P. H. J. Schenning 等 9 位作者2005-12-16Journal of the American Chemical Society
The kinetics of photoinduced charge transfer reactions in covalently linked donor-acceptor molecules often undergoes dramatic changes when these molecules self-assemble from a molecular dissolved state into a nanoaggregate. Frequently, the origin of these changes is only partially understood. In this paper, we describ…
Organic Electronics and PhotovoltaicsPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Hsin-Cheng Chu、Chun-Hong Kuo、Michael H. Huang2005-12-16Inorganic Chemistry
The synthesis of gold nanoplates was carried out in an aqueous solution by thermal reduction of HAuCl(4) with trisodium citrate in the presence of cetyltrimethylammonium bromide (CTAB) surfactant in just 5-40 min. The sizes of the gold nanoplates can be varied from as small as tens of nanometers in width, to several h…
Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsNanomaterials for catalytic reactions
En‐Che Yang、Wolfgang Wernsdorfer、Lev N. Zakharov 等 11 位作者2005-12-16Inorganic Chemistry
A series of Ni(4) cubane complexes with the composition [Ni(hmp)(ROH)Cl](4) complexes 1-4 where R= -CH(3) (complex 1), -CH(2)CH(3) (complex 2), -CH(2)CH(2)(C(4)H(9)) (complex 3), -CH(2)CH(2)CH(2)(C(6)H(11)) (complex 4), hmp(-) is the anion of 2-hydroxymethylpyridine, t-Buhmp(-) is the anion of 4-tert-butyl-2-hydroxyme…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesOrganic and Molecular Conductors Research
M. Karppinen、H. Yamauchi、Shinya Otani 等 8 位作者2005-12-16Chemistry of Materials
An uncommon oxygen absorption/desorption behavior is reported for the cation-stoichiometric cobalt oxide, YBaCo 4 O 7, structurally composed of two kinds of layers of corner-sharing CoO 4 tetrahedra. We have found that YBaCo 4 O 7+ δ absorbs and desorbs oxygen up to δ ≈ 1.5 in a narrow temperature range below 400 °C.…
Advancements in Solid Oxide Fuel CellsMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
Sergei Manzhos、Xiaogang Wang、Richard Dawes 等 4 位作者2005-12-16The Journal of Physical Chemistry A
It is shown that neural networks (NNs) are efficient and effective tools for fitting potential energy surfaces. For H2O, a simple NN approach works very well. To fit surfaces for HOOH and H2CO, we develop a nested neural network technique in which we first fit an approximate NN potential and then use another NN to fit…
Advanced Chemical Physics StudiesSpectroscopy and Quantum Chemical StudiesMachine Learning in Materials Science
Volker Eyert、Stefan Ebbinghaus、Thilo Kopp2005-12-16arXiv
The semiconductor-semiconductor transition of La2RuO5 is studied by means of augmented spherical wave (ASW) electronic structure calculations as based on density functional theory and the local density approximation. This transition has lately been reported to lead to orbital ordering and a quenching of the local spin…
Materials ScienceStrongly Correlated Electrons
Sung-Jin Cho、Ahmed M. Shahin、Gary J. Long 等 7 位作者2005-12-16arXiv
Fe/Au nanoparticles have been chemically synthesized through a reverse micelle reaction and investigated by both conventional and synchrotron based x-ray diffraction and by magnetic and Moessbauer spectral studies. The powder x-ray diffraction patterns reveal both the presence of crystalline alpha-iron and gold and th…
Materials Science
N. A. Buznikov、S. S. Yoon、L. Jin 等 5 位作者2005-12-16arXiv
The off-diagonal magneto-impedance in Co-based amorphous ribbons was measured using a pick-up coil wound around the sample. The ribbons were annealed in air or in vacuum in the presence of a weak magnetic field. The evolution of the first and second harmonics in the pick-up coil voltage as a function of the current am…
Materials Science
Qinghua Zhang、Dirk R. Lippits、Sanjay Rastogi2005-12-16Macromolecules
A new method is developed to homogeneously disperse single-walled carbon nanotubes bundles (SWNTs) in an intractable polymer, for example, ultrahigh molecular weight polyethylene ( M w > 3 × 10 6 g/mol) (UHMWPE). The dispersion is obtained by spraying an aqueous solution of SWNTs onto a fine UHMWPE powder directly obt…
Carbon Nanotubes in CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties
Jonathan Ayutsede、Milind Gandhi、Sachiko Sukıgara 等 7 位作者2005-12-16Biomacromolecules
Nanocomposite fibers of Bombyx mori silk and single wall carbon nanotubes (SWNT) were produced by the electrospinning process. Regenerated silk fibroin dissolved in a dispersion of carbon nanotubes in formic acid was electrospun into nanofibers. The morphology, structure, and mechanical properties of the electrospun n…
Surface Modification and SuperhydrophobicityElectrospun Nanofibers in Biomedical ApplicationsSilk-based biomaterials and applications