Oliver Gronwald、Seiji Shinkai2001-09-06Journal of the Chemical Society Perkin Transactions 2
The influence of modifications at the benzylidene protection group on the gelation ability of 1-O-methyl-4,6-O-benzylidene-monosaccharides was investigated. For α-D-glucose and α-D-mannose the ability for self-aggregation was found to be significantly extended by the introduction of a p-nitro-substituent. As a result,…
Lipid Membrane Structure and BehaviorGlycosylation and Glycoproteins ResearchSupramolecular Self-Assembly in Materials
Zenon J. Kokot、H Zmidzińska2001-09-06PubMed
Equilibrium solubility, the profile and the rate of ibuprofen dissolution in solutions of sodium dodecyl sulfate, Tween 60 and Brij 35 were studied. It was found that the solubility of ibuprofen was enhanced by the formed micellar system. The size and shape of formed micelles depended on the used particular surfactant…
Surfactants and Colloidal SystemsAnalytical Chemistry and ChromatographyCrystallization and Solubility Studies
B. C. Trasferetti、Celso U. Davanzo、Rita Aparecida Zoppi 等 5 位作者2001-09-06Physical review. B, Condensed matter
Infrared reflection-absorption spectra of ${\mathrm{TiO}}_{2}$ thin films deposited by plasma-enhanced chemical vapor deposition onto aluminum and by a sol-gel process onto platinum were obtained using s- and p-polarized light and oblique incidence angles. Prominent bands with variable reflection minima position and l…
Glass properties and applicationsSurface Roughness and Optical MeasurementsOptical and Acousto-Optic Technologies
Murli H. Manghnani、Sergey N. Tkachev、Pavel V. Zinin 等 7 位作者2001-09-06Physical review. B, Condensed matter
Surface Brillouin scattering technique has been used to study the elastic properties of superhard amorphous carbon, synthesized from ${\mathrm{C}}_{60}$ under high pressure (13--13.5 GPa) and temperature $(900\ifmmode\pm\else\textpm\fi{}100\ifmmode^\circ\else\textdegree\fi{}\mathrm{C}).$ This is the first reliable det…
Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchFullerene Chemistry and Applications
Alfred P. Weber、Martin Seipenbusch、Gerhard Kasper2001-09-06The Journal of Physical Chemistry A
“Aerosol catalysis” is shown to be a powerful tool for investigating the catalytic properties of freshly formed nanoparticles in situ and without substrate interference. The method is first outlined conceptually, followed by an illustrative application to the catalytic formation of methane on a nickel nanoaerosol. Rea…
Atmospheric chemistry and aerosolsCatalytic Processes in Materials Sciencenanoparticles nucleation surface interactions
Bernadine M. Flanagan、Paul V. Bernhardt、Elmars Krausz 等 5 位作者2001-09-06Inorganic Chemistry
Polarized absorption and emission spectra of trigonal single crystals of an Er(III) complex coordinated to a heptadentate tripodal ligand are reported at temperatures between 8 and 298 K. The assigned energy levels below the onset of ligand absorption (< 25 000 cm(-1)) are fitted to a parametrized electronic Hamiltoni…
Organic Light-Emitting Diodes ResearchMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Isabelle M. Dixon、Jean‐Paul Collin、Jean‐Pierre Sauvage 等 4 位作者2001-09-06Inorganic Chemistry
Multicomponent arrays based on a central iridium(III) bis-terpyridine complex (Ir) used as assembling metal and free-base, zinc(II) or gold(III) tetraaryl-porphyrins (PH(2), PZn, PAu) have been designed to generate intramolecular photoinduced charge separation. The rigid dyads PH(2)-Ir, PZn-Ir, PAu-Ir, and the rigid a…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresSurface Chemistry and Catalysis
Masaru Kuno、David P. Fromm、Alan Gallagher 等 6 位作者2001-09-06Nano Letters
Fluorescence “blinking” kinetics of isolated colloidal InP quantum dots (QDs) are investigated via confocal single molecule microscopy. Analysis of fluorescence trajectories reveals inverse power law behavior (∝ 1/τ m ) in on/off time probability densities with m on ≈ 2.0(2) and m off ≈ 1.5(1). Such an inverse power l…
Quantum Dots Synthesis And PropertiesMolecular Junctions and NanostructuresNanowire Synthesis and Applications
Jun Okabayashi、A. Kimura、O. Rader 等 7 位作者2001-09-06Physical review. B, Condensed matter
Valence-band dispersions in ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ along the $\ensuremath{\Gamma}\ensuremath{-}\ensuremath{\Delta}\ensuremath{-}X$ line $(k\ensuremath{\Vert}[001])$ are obtained by angle-resolved photoemission spectroscopy. Compared with the spectra of GaAs, a small energy shift…
ZnO doping and propertiesGa2O3 and related materialsElectronic and Structural Properties of Oxides
Brian J. Nablo、Ta-Yung Chen、Mark H. Schoenfisch2001-09-06Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSol−Gel Derived Nitric-Oxide Releasing Materials that Reduce Bacterial AdhesionBrian J. Nablo, Ta-Yung Chen, and Mark H. SchoenfischView Author Information Department of Chemistry University of North Carolina Chapel Hill, North Carolina 27599-3290 Cite this: J. Am. Che…
Corrosion Behavior and InhibitionBacterial biofilms and quorum sensingPolymer Surface Interaction Studies
Kikuo Harigaya2001-09-06arXiv
A phenomenological coupled exciton model is proposed in order to characterize optical excitations in extended dendrimers. An onsite exciton state is assigned at each phenyl rings and a nearest neighbor hopping integral which obeys the Gaussian distribution is considered between the exciton states. The decreasing optic…
Materials ScienceSoft Condensed Matterphysics.atm-clusChemical Physicsphysics.optics
Kikuo Harigaya、Naoki Kawatsu、Toshiaki Enoki2001-09-06arXiv
Antiferromagnetism in stacked nanographite is investigated with using the Hubbard-type model. The A-B stacking is favorable for the hexagonal nanographite with zigzag edges, in order that magnetism appears. Next, we find that the open shell electronic structures can be origins of the decreasing magnetic moment with th…
cond-matMaterials ScienceSoft Condensed Matterphysics.atm-clusChemical Physics
B. A. Glowacki、M. Majoros2001-09-06arXiv
The paper presents discussion on up to date results on MgB2 conductors from the point of view of their future dc and ac applications. Basic physical parameters of MgB2 compound relevant to conductors are introduced. Different conductor preparation methods and conductor architectures are presented and attainable critic…
Materials ScienceSuperconductivity
Stephan Roche、François Triozon、Ángel Rubio 等 4 位作者2001-09-06Physical review. B, Condensed matter
We report on a numerical study of quantum diffusion over $\ensuremath{\mu}\mathrm{m}$ lengths in defect-free multiwalled nanotubes. The intershell coupling allows the wave packet spreading over several shells, and when their periodicities along the nanotube axis are incommensurate, electronic propagation is shown to f…
Carbon Nanotubes in CompositesGraphene research and applicationsQuantum and electron transport phenomena
T. Andrearczyk、J. Jaroszynski、G. Karczewski 等 9 位作者2001-09-06arXiv
We examine and identify magnetoresistance mechanisms in 2D system containing a sizable concentration of magnetic ions. We argue that some of these mechanisms can serve as a tool to measure spin polarization. Lack of spin degeneracy and enhanced localization make it possible to detect an additional QHE plateau associat…
Materials Science
Markus Weinmann、Sabine Nast、Frank Berger 等 6 位作者2001-09-05Applied Organometallic Chemistry
Abstract The synthesis of boron‐modified polysilazanesof general type {B[C 2 H 4 Si(R)NR′] 3 } n [R = CH 3 , (NR′) 0.5 ; R′ = H, CH 3 ] by dehydrogenative coupling of tris(hydridosilylethyl)boranes B[C 2 H 4 Si(CH 3 ) n H 3− n ] 3 (C 2 H 4 = CHCH 3 , CH 2 CH 2 ; n = 0, 1) and ammonia or methylamine is reported. Deta…
Advanced ceramic materials synthesisSynthesis and characterization of novel inorganic/organometallic compoundsOrganoboron and organosilicon chemistry
Chifei Wu、Yoshio Ōtani、Norikazu Namiki 等 6 位作者2001-09-05Journal of Applied Polymer Science
Abstract The dynamic mechanical properties of hybrids of chlorinated polyethylene (CPE) and 3,9‐bis[1,1‐dimethyl‐2{β‐(3‐ tert ‐butyl‐4‐hydroxy‐5‐methylphenyl)propionyloxy}ethyl]‐2,4,8,10‐tetraoxaspiro[5,5]‐undecane (AO‐80) were investigated. The CPE/AO‐80 hybrids showed a novel relaxation in addition to the glass tran…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer composites and self-healing
Princy Gupta、Jonas Schulte、John E. Flood 等 4 位作者2001-09-05Journal of Applied Polymer Science
Abstract We have investigated the formation of high‐strength, high‐modulus fibers from four aliphatic polyketone resins. One resin was a perfectly alternating copolymer of ethylene and carbon monoxide, while the other three were terpolymers containing up to 6 mol % propylene. The mechanical properties were measured as…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
Hans Jürgen Seifert、Jianqiang Peng、Jerzy A. Golczewski 等 4 位作者2001-09-05Applied Organometallic Chemistry
Abstract Phase equilibria and phase reactions of precursor‐derived ceramics of the Si–C–N and the Si–B–C–N systems at temperatures higher than 1700 K are described. CALPHAD (CALculation of PHAse Diagrams) results confirm quantitatively the data from thermogravimetry and differential thermal analysis of precursor‐deriv…
Advanced ceramic materials synthesisAdvanced materials and compositesMicrowave Dielectric Ceramics Synthesis
Sang Kyoo Lim、Tae Won Son、Dong Won Lee 等 5 位作者2001-09-05Journal of Applied Polymer Science
Abstract Regenerated cellulose fibers from rice straws with a diameter of 10 to 25 μm and initial modulus of 11 to 13 GPa were prepared by wet spinning in rice straw/ N ‐methylmorpholine‐ N ‐oxide (MMNO) solution. X‐ray diffraction analysis indicates that the rice straw regenerated fibers are classified as cellulose (…
Biofuel production and bioconversionAdvanced Cellulose Research Studies