Dasari Kishore、S. Kannan2002-10-30Green Chemistry
Isomerization of olefins, in particular eugenol and safrole, is an important reaction as the products, namely isoeugenol and isosafrole, find application in pharmaceuticals and fragrances. The catalyst employed to carry out this reaction is either a strong alkaline solution (KOH or KOtBu) or precious metal catalysts u…
Carbon dioxide utilization in catalysisChemical Synthesis and ReactionsLayered Double Hydroxides Synthesis and Applications
T. Arima、Daisuke Akahoshi、K. Oikawa 等 7 位作者2002-10-30Physical review. B, Condensed matter
A neutron-diffraction study on an A-site-ordered perovskite manganite $R{\mathrm{BaMn}}_{2}{\mathrm{O}}_{6}$ $(R=\mathrm{Tb})$ has revealed that the magnetic structure is characterized by two modulation vectors, (1/2 0 1/4) and (1/4 1/4 1/4), in the primitive cubic setting. The appearance of the magnetic order is acco…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Kerry K. Karukstis、Loren A. Perelman、Wun K. Wong2002-10-30Langmuir
The spectral properties of azo dye aggregates have been used to determine the influence of the dendritic surface of Starburst poly(amidoamine) dendrimers on the alignment of electrostatically bound azo dyes. The surface structure and morphology of dendrimers provide enhanced opportunities for the ordered assembly of a…
Molecular Sensors and Ion DetectionLuminescence and Fluorescent MaterialsDendrimers and Hyperbranched Polymers
Luis Emilio Cruz‐Barba、Sorin Manolache、Ferencz S. Denes2002-10-30Langmuir
SF 6 -RF-plasma environments were employed for the generation of SF x -oxygen-scavenger species, and used for the synthesis of thin highly fluorinated paper, poly(acrylic acid) (PAA), polyethylene (PE), plasma-oxidized polyethylene (OxPE), and poly(vinyl alcohol) (PVA) surface layers. The concentration of fluorine ato…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsPlasma Diagnostics and Applications
Mengying Zhu、C. P. Hong2002-10-30Physical review. B, Condensed matter
The growth morphology of regular eutectics has been studied using a model eutectic alloy and a transparent ${\mathrm{CBr}}_{4}\ensuremath{-}{\mathrm{C}}_{2}{\mathrm{Cl}}_{6}$ eutectic alloy. A modified cellular automaton (MCA) model is developed to model the evolution of regular eutectic microstructures. Different fro…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaFluid Dynamics and Thin Films
Yinghua Qi、Pierre Desjardins、Zhi Yuan Wang2002-10-30Journal of Optics A Pure and Applied Optics
A series of dinuclear ruthenium complexes with 1,2-dicarbonylhydrazido (DCH) ligands having various substituents were prepared in order to study the correlation between their optical, electrochemical behaviour and the electron density within the bridging ligands. As the average donor strength of the substituent increa…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsTransition Metal Oxide Nanomaterials
Paul Watts、W. K. Hsu、David P. Randall 等 5 位作者2002-10-30Chemistry of Materials
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFe-Filled Carbon Nanotubes: Nano-electromagnetic InductorsP. C. P. Watts, W. K. Hsu, D. P. Randall, V. Kotzeva, and G. Z. ChenView Author Information School of Chemistry, Physics and Environmental Science, University of Sussex, Brighton BN1 9QJ, U.K., School of Biologi…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research
Dmitrii F. Perepichka、Martin R. Bryce、Igor F. Perepichka 等 10 位作者2002-10-30Journal of the American Chemical Society
The synthesis of novel electrochemically amphoteric TTFAQ-sigma-A compounds (TTFAQ = 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene, sigma = saturated spacer, A = polynitrofluorene acceptor) is reported. Their solution redox behavior is characterized by three single-electron reduction and one two-electron oxid…
Magnetism in coordination complexesMolecular Junctions and NanostructuresOrganic and Molecular Conductors Research
Shigeru Watanabe、Miyoko Sonobe、Mari Arai 等 7 位作者2002-10-30Chemical Communications
A gold nanoparticle surface-modified with amide ligands shows enhanced optical sensing of anions: the detection limit is increased by about three orders of magnitude higher than that originally expected from the anion binding ability of neutral amide ligands.
Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesMolecular Sensors and Ion Detection
Jamie J. Kruzic、Robert O. Ritchie2002-10-30eScholarship (California Digital Library)
Recently, a method for evaluating the fracture toughness of ceramics has been proposed by Fett based on the computed crack‐opening displacements of cracks emanating from Vickers hardness indentations. To verify this method, experiments have been conducted to determine the toughness of a commercial silicon carbide cera…
Advanced ceramic materials synthesisAdvanced Surface Polishing TechniquesAdvanced materials and composites
S. B. Rochal、Vladimir Lorman2002-10-30Physical review. B, Condensed matter
Different existing elastodynamical models of icosahedral quasicrystals are analyzed. The simplest minimal model of the phonon-phason dynamics is formulated. Physical restrictions and possible applications of the proposed model are considered. Several generalizations of the minimal model are discussed. It is shown that…
Quasicrystal Structures and PropertiesMineralogy and Gemology Studies
Xin Lü、Feng Tian、Nanqin Wang 等 4 位作者2002-10-30Organic Letters
[structure: see text] The viability of the Diels-Alder (DA) cycloaddition of conjugated dienes onto the sidewalls of single-wall carbon nanotubes is assessed by means of a two-layered ONIOM(B3LYP/6-31G:AM1) approach. Whereas the DA reaction of 1,3-butadiene on the sidewall of an armchair (5,5) nanotube is found to be…
Carbon Nanotubes in CompositesFullerene Chemistry and ApplicationsMechanical and Optical Resonators
Kwang S. Kim、Seung Bum Suh、Jong Chan Kim 等 23 位作者2002-10-30Journal of the American Chemical Society
Using the computer-aided molecular design approach, we recently reported the synthesis of calix[4]hydroquinone (CHQ) nanotube arrays self-assembled with infinitely long one-dimensional (1-D) short hydrogen bonds (H-bonds) and aromatic-aromatic interactions. Here, we assess various calculation methods employed for both…
Supramolecular Chemistry and ComplexesCrystallography and molecular interactionsSupramolecular Self-Assembly in Materials
Takashi Koida、Mikk Lippmaa、Tomoteru Fukumura 等 7 位作者2002-10-30Physical review. B, Condensed matter
In order to evaluate the effect of charge transfer and/or charge ordering in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ on the magnetic and transport properties, a library of $[({\mathrm{LaMnO}}_{3}{)}_{m}/({\mathrm{SrMnO}}_{3}{)}_{m}{]}_{n}$ superlattices have been fabricated by the combina…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Reiko Kuroda、Yoshitane Imai、Nobuo Tajima2002-10-30Chemical Communications
Co-grinding of crystals of racemic-bis-beta-naphthol (rac-BN) and benzoquinone (BQ) produces a novel crystal adduct through crystal sheering and molecular diffusion processes in the solid state, which is structurally distinct from adducts obtained from solution or melt.
Liquid Crystal Research AdvancementsCrystallography and molecular interactionsCrystallization and Solubility Studies
Yong Ho Kim、Young‐wook Jun、Byung-Ho Jun 等 5 位作者2002-10-30Journal of the American Chemical Society
We demonstrate a novel synthetic scheme that can be used to control the crystalline phase and shape of GaP semiconductor nanocrystals. Our study shows that steric effects of surfactant ligands can modulate the crystalline phases and control the shapes of nanocrystals. The shape of the nanocrystals obtained varies from…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNanowire Synthesis and Applications
Paul Maragakis、Ryan Lee Barnett、Efthimios Kaxiras 等 5 位作者2002-10-30arXiv
Minuscule molecular forces can transform DNA into a structure that is elongated by more than half its original length. We demonstrate that this pronounced conformational transition is of relevance to ongoing experimental and theoretical efforts to characterize the conducting properties of DNA wires. We present quantum…
Materials Science
Marcus Freitag、A. T. Charlie Johnson、Sergei V. Kalinin 等 4 位作者2002-10-30Physical Review Letters
The influence of defects on electron transport in single-wall carbon nanotube field-effect transistors (CNFETs) is probed by combined scanning gate microscopy (SGM) and scanning impedance microscopy (SIM). SGM images are used to quantify the depletion surface potential, and from this the Fermi level, at individual def…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsMechanical and Optical Resonators
Hiroyuki Nakamura、Yoshiko Yamaguchi、Masaya Miyazaki 等 6 位作者2002-10-30Chemical Communications
A micro-reactor was utilized for continuous and controlled CdSe nanocrystal preparation. Effects of reaction conditions on optical properties of the nanocrystals were investigated; in this current system, rapid and exact temperature control of the micro-reactor was beneficial for controlling particle diameter and repr…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Q. A. Wang、S. Salaun、A. Bulou2002-10-30arXiv
The pressure influence on the lattice vibration of $CaZnF_4$ has been studied by Raman diffusion up to 17 GPa. Most Raman frequencies increase with increasing pressure. Three singularities in the pressure induced frequency evolution are observed around 1.5 GPa, 10 GPa and 17 GPa. The samples pressurized to 17 GPa or h…
Materials Science