Geoffrey Hutchison、Mark A. Ratner、Tobin J. Marks2005-02-05The Journal of Physical Chemistry B
Oxidative doping of extended pi-conjugated polymers and oligomers produces dramatic changes in optical and electrical properties, arising from polaron and soliton-derived midgap states. Despite the great importance of such changes for materials properties, far less is known about the cationic polaron states than about…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsTransition Metal Oxide Nanomaterials
Rajesh Mishra、Robert Seckler、Rajiv Bhat2005-02-05Journal of Biological Chemistry
Efficient refolding of proteins and prevention of their aggregation during folding are of vital importance in recombinant protein production and in finding cures for several diseases. We have used citrate synthase (CS) as a model to understand the mechanism of aggregation during refolding and its prevention using seve…
Protein Structure and DynamicsProtein purification and stabilityEnzyme Structure and Function
G-M Rignanese2005-02-05Journal of Physics Condensed Matter
A review is given of various first-principles studies of the dielectric properties of crystalline and amorphous transition metal oxides and silicates, which have drawn considerable attention as potential high-κ materials. After a brief summary of the principal equations of density-functional theory related to the diel…
Ferroelectric and Piezoelectric MaterialsSemiconductor materials and devicesMicrowave Dielectric Ceramics Synthesis
Luisa Andruzzi、Wageesha Senaratne、Alexander Hexemer 等 8 位作者2005-02-05Langmuir
The nitroxide-mediated polymerization of styrenic monomers containing oligo(ethylene glycol) (OEGn) moieties was chosen for the preparation of biocompatible polymer brushes tethered to silicon oxide surfaces due to the broad range of monomer structures available and the use of a nonmetallic initiator. These surfaces w…
Polymer Surface Interaction StudiesAdhesion, Friction, and Surface InteractionsNanofabrication and Lithography Techniques
Chun‐Jiang Jia、Ling‐Dong Sun、Liping You 等 7 位作者2005-02-05The Journal of Physical Chemistry B
Pure monoclinic (m-) and tetragonal phased (t-) LaVO(4) nanocrystals could be obtained by a hydrothermal method in a controllable way with additives. It is found that chelating ligands, such as ethylenediaminetetraacetic acid [EDTA or H(4)L, where L(4-) = (CH(2)COO)(2)N(CH(2))(2)N(CH(2)COO)(2)(4-)], favor the formatio…
Advanced Photocatalysis TechniquesLuminescence Properties of Advanced MaterialsCrystal Structures and Properties
Stéphane Roux、Bruno Garcia、Jean‐Luc Bridot 等 10 位作者2005-02-05Langmuir
The use of gold nanoparticles as biological probes requires the improvement of colloidal stability. Dihydrolipoic acid (DHLA), a dithiol obtained by the reduction of thioctic acid, appears therefore very attractive for the stabilization and the further functionalization of gold nanoparticles because DHLA is characteri…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesMolecular Junctions and Nanostructures
T. David、S. Goldsmith、R. L. Boxman2005-02-05arXiv
Thin p-type Sb-doped ZnO films were grown by filtered vacuum arc deposition (FVAD), on untreated glass samples. The arc cathode was prepared by dissolving Sb into molten Zn. The deposition was performed with 200 A arc current, running for 120-240 s in 0.426 Pa oxygen pressure. The film thickness was 330-500 nm. The ao…
Materials Science
Keiki Kishikawa、Shoichiro Nakahara、Yohei Nishikawa 等 5 位作者2005-02-05Journal of the American Chemical Society
Novel columnar liquid crystalline compounds N,N'-bis(3,4,5-trialkoxylphenyl)ureas 1a-c (R = n-C(8)H(17), n-C(12)H(25), and n-C(16)H(33)) were synthesized, and their phase transitions were measured by differential scanning calorimetery. The superstructures were investigated by X-ray diffraction, polarized light optical…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern FormationSynthesis and Properties of Aromatic Compounds
Ying Wang、Katsunori Takahashi、Huamei Shang 等 4 位作者2005-02-05The Journal of Physical Chemistry B
Nanotube arrays of amorphous vanadium pentoxide (V(2)O(5)) were synthesized via template-based electrodeposition, and its electrochemical properties were investigated for Li-ion intercalation applications. The nanotubes have a length of 10 microm, outer diameter of 200 nm and inner diameter of 100 nm. Electrochemical…
Gas Sensing Nanomaterials and SensorsTransition Metal Oxide NanomaterialsCatalysis and Oxidation Reactions
Neil Anderson、Achim Hartschuh、Steve Cronin 等 4 位作者2005-02-05Journal of the American Chemical Society
We use near-field Raman imaging and spectroscopy to study localized vibrational modes along individual, single-walled carbon nanotubes (SWNTs) with a spatial resolution of 10-20 nm. Our approach relies on the enhanced field near a laser-irradiated gold tip which acts as the Raman excitation source. We find that for ar…
Carbon Nanotubes in CompositesMechanical and Optical ResonatorsNear-Field Optical Microscopy
Rui Guo、Yang Song、Gangli Wang 等 4 位作者2005-02-05Journal of the American Chemical Society
This paper compares the kinetics of exchanges of phenylethanethiolate ligands (PhC2S-) of the monolayer-protected clusters (MPCs) Au(38)(SC2Ph)(24) and Au(140)(SC2Ph)(53) with p-substituted arylthiols (p-X-PhSH), where X = NO(2), Br, CH(3), OCH(3), and OH. First-order rate constants at 293 K for exchange of the first…
Gold and Silver Nanoparticles Synthesis and ApplicationsNanocluster Synthesis and ApplicationsPharmacological Effects and Toxicity Studies
Shengwen Zhang、Shuxue Zhou、Yu-Ming Weng 等 4 位作者2005-02-05Langmuir
The SiO(2)/polystyrene nanocomposite particles were synthesized through miniemulsion polymerization by using sodium lauryl sulfate surfactant (SLS), hexadecane costabilizer in the presence of silica particles coated with methacryloxy(propyl)trimethoxysilane. Core-shell or other interesting morphology composite particl…
Advanced Polymer Synthesis and CharacterizationMesoporous Materials and CatalysisDendrimers and Hyperbranched Polymers
C. A. Perroni、V. Cataudella、G. De Filippis 等 4 位作者2005-02-04Physical Review B
The polaron features due to electron-phonon interactions with different coupling ranges are investigated by adopting a variational approach. The ground-state energy, the spectral weight, the average kinetic energy, the mean number of phonons, and the electron-lattice correlation function are discussed for the system w…
Physics of Superconductivity and MagnetismZnO doping and propertiesMagnetic and transport properties of perovskites and related materials
R. John Errington、S.S. Petkar、Benjamin R. Horrocks 等 6 位作者2005-02-04Angewandte Chemie
Kovalent gebunden: Das Polyoxometallat (nBu4N)3[(MeO)TiW5O18] lässt sich einfach an Alkanol-funktionalisierten Oberflächen von porösem und einkristallinem Silicium verankern (siehe Bild, Polyeder: Polyoxometallat, dunkelblau: Si-Oberfläche). Rastertunnelmikroskopisch wurden auf funktionalisiertem Si(111) Inseln mit 35…
Metal-Organic Frameworks: Synthesis and ApplicationsRadioactive element chemistry and processingPolyoxometalates: Synthesis and Applications
Seung‐Yeop Kwak、Jeongsoo Choi、Hee Jae Song2005-02-04Chemistry of Materials
The dynamic viscoelastic relaxation behavior and the molecular mobility of a series of hyperbranched poly( ε -caprolactone)s (HPCLs) possessing molecular architectural variation and their linear counterpart, linear poly( ε -caprolactone) (LPCL), were characterized and evaluated in conjunction with their specific molec…
Advanced Polymer Synthesis and CharacterizationRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers
Claudia Wickleder2005-02-04Chemistry of Materials
Excitation and emission spectra of Sr(SCN) 2:Eu 2+ at different temperatures are presented. A strong bright green emission due to 4f 6 5d 1 → 4f 7 transitions is observed at low temperature. The spectra of this new kind of host lattices are compared to those of sulfides and nitrides. This comparison shows that the inf…
Luminescence Properties of Advanced MaterialsLanthanide and Transition Metal ComplexesQuantum optics and atomic interactions
Paul R. Giunta、Lambertus J. van de Burgt、A. E. Stiegman2005-02-04Chemistry of Materials
Carbon−silica nanocomposites are fabricated from the pyrolysis of polyacrylonitrile (PAN), which has been photopolymerized in the ∼7 nm voids of porous Vycor glass. The effect of the pores on the pyrolysis process was investigated by thermal analysis. Temperatures at which key processes in the pyrolysis of bulk PAN oc…
Polymer Nanocomposites and PropertiesFlame retardant materials and propertiesFiber-reinforced polymer composites
Yuriy Zakrevskyy、Bernd M. Smarsly、Joachim Stumpe 等 4 位作者2005-02-04Physical Review E
Liquid-crystalline properties of the ionic self assembled complex benzenehexacarboxylic- (didodecyltrimethylammonium)6 [BHC- (C12D)6] were investigated by polarizing microscopy, differential scanning calorimetry (DSC), x-ray analysis, null ellipsometry, UV and IR spectroscopy. The complex exhibits a bilayer smectic Sm…
Liquid Crystal Research AdvancementsIonic liquids properties and applicationsSurfactants and Colloidal Systems
Jurriaan Beckers、Gadi Rothenberg2005-02-04ChemPhysChem
Spot the difference: Oxidation of propane/CO mixtures is efficiently catalysed by mixed perovskite oxides heated directly using microwave irradiation (see figure). A set of twelve catalysts is screened for activity, selectivity and stability towards SO2 poisoning. LaSrMn shows good activity, selectivity and heating ca…
Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Yun Hang Hu、Eli Ruckenstein2005-02-04Industrial & Engineering Chemistry Research
Although Li 3 N can theoretically absorb as much as about 10 wt % hydrogen, its reversible hydrogen capacity is only about 5.5 wt % because only a fraction of the hydrogen absorbed can be desorbed at relatively low temperatures. In the present paper, it is shown that the addition of LiNH 2 to Li 3 N constitutes an eff…
Hydrogen Storage and MaterialsHybrid Renewable Energy SystemsAmmonia Synthesis and Nitrogen Reduction