Guoyou Luan、Yangguang Li、Shutao Wang 等 8 位作者2002-12-17Dalton Transactions
A new polyoxometalate derivative {PW9V3O40[Ag(2,2′-bipy)]2[Ag2(2,2′-bipy)3]2} 1 has been hydrothermally synthesized and structurally characterized by the single crystal X-ray diffraction. X-Ray analysis showed that both [Ag(2,2′-bipy)]+ and [Ag2(2,2′-bipy)3]2+ units are supported on the α-Keggin polyoxoanion [PW9V3O40…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis
O.L.J. Gijzeman、A.J.M. Mens、Joop H. van Lenthe 等 5 位作者2002-12-17The Journal of Physical Chemistry B
The effect of zeolite composition and structure on XPS core level binding energies has been studied for a large class of zeolites (FAU, MFI, MOR, LTA) differing in their counterions (Na, K, Rb, Ca, Mg, Ba) and Si:Al ratio (1 to 160). Whereas absolute binding energies cannot be determined to any reasonable degree of ac…
Luminescence Properties of Advanced MaterialsCatalytic Processes in Materials ScienceElectron and X-Ray Spectroscopy Techniques
Qing Chen、F.C. Lee、Jian Jiang 等 4 位作者2002-12-17OpenAlex
A new transformer model for a multiple-winding transformer, which describes the leakage phenomenon, is presented. The unique feature of the model is that each parameter in the model corresponds to a physical magnetic flux. The model parameters can be determined by using the finite element tool. The model can also be c…
High voltage insulation and dielectric phenomenaMagnetic Properties and ApplicationsPower Transformer Diagnostics and Insulation
Isamu Maeda、Hitoshi Miyasaka、Fusako Umeda 等 5 位作者2002-12-17Biotechnology and Bioengineering
Growth of and hydrogen production by wild-type (WT) Rhodovulum sulfidophilum were compared with those by one of its mutants lacking the poly(3-hydroxybutyrate) (PHB) biosynthesis ability (PNM2). During phototrophic growth under aerobic conditions with fixed illumination, changes in the extinction coefficient and PHB c…
Enzyme Catalysis and ImmobilizationWastewater Treatment and Nitrogen Removalbiodegradable polymer synthesis and properties
Shin Kawano、Norifumi Fujita、Kjeld J. C. van Bommel 等 4 位作者2002-12-17Chemistry Letters
Abstract New cholesterol-based gelators bearing a 4-, 3-, or 2-pyridyl group (1, 2, or 3, respectively) have been designed. Compound 1 gelled 16 of the 19 solvents tested, indicating that 1 acts as a very versatile gelator. The gelation ability of compound 2 was significantly improved by added AgOTf, owing to an Ag(I)…
Surfactants and Colloidal SystemsSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
V. Železný、Eric Cockayne、J. Petzelt 等 7 位作者2002-12-17Physical review. B, Condensed matter
Spectroscopic studies involving dielectric, submillimeter, infrared, and Raman measurements were performed on a ${\mathrm{CaTiO}}_{3}$ single crystal, covering a broad spectral range (static to 10 THz) at temperatures from 6 to 300 K. The results show mode softening characteristic of an incipient ferroelectric with ${…
Ferroelectric and Piezoelectric MaterialsGlass properties and applicationsMicrowave Dielectric Ceramics Synthesis
Charles Dubois、John R. Reynolds2002-12-17Advanced Materials
A family of polymers based on alternating bi‐EDOT and pyridine units is reported. Poly(BEDOT‐PyrPyr‐Ph 2 ), with a bandgap of 1.2 eV, has four electrochemically accessible colors (dark gray, burgundy, lime green, and light gray) each corresponding to a distinct redox state. In‐situ conductance measurements illustrate…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsElectrochemical Analysis and Applications
Weller, Horst2002-12-17Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
We describe recent developments in the synthesis of semiconductor nanoparticles, which lead to a substantial improvement of the luminescence quantum efficiency. Concerning a theoretical model for the growth of an ensemble of nanoparticles, the highest quantum efficiencies are achieved in particles that grow under cond…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsPhotonic Crystals and Applications
Ákos Kukovecz、Thomas Pichler、Rudolf Pfeiffer 等 5 位作者2002-12-17Physical Chemistry Chemical Physics
Single wall carbon nanotubes (SWCNTs) synthesized by the recently developed HiPco® method differ from those obtained by other techniques because their diameter distribution is broader and is centered at a smaller value. Therefore, HiPco® samples contain an unusual wide selection of different nanotubes. Combining this…
Carbon Nanotubes in CompositesFullerene Chemistry and ApplicationsMechanical and Optical Resonators
Hee Cheul Choi、Summit Kundaria、Dunwei Wang 等 7 位作者2002-12-17Nano Letters
Iron containing nanoparticles are found to spontaneously form on hydroxylated SiO 2 substrates when immersed in a freshly mixed aqueous solution of FeCl 3 and hydroxylamine. Upon calcination, a submonolayer of uniformly distributed iron oxide nanoparticles can be derived and used to catalyze the growth of single-walle…
Carbon Nanotubes in CompositesGraphene research and applicationsNanopore and Nanochannel Transport Studies
Tsukasa Torimoto、Jocelyn P. Reyes、Kentaro Iwasaki 等 8 位作者2002-12-17Journal of the American Chemical Society
The size-selective photoetching technique was used to control the size of a CdS nanoparticle inside a silica shell. With monochromatic light irradiation, the diffuse reflectance spectra of silica-coated CdS nanoparticles were blue-shifted, and the size of the resulting CdS nanoparticles incorporated in the silica shel…
Advanced Photocatalysis TechniquesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
F. Huisken、Gilles Ledoux、O. Guillois 等 4 位作者2002-12-17Advanced Materials
Abstract Crystalline Si nanoparticles with diameters between 2.5 and 20 nm are prepared by CO 2 ‐laser‐induced decomposition of silane in a gas flow reactor. A small portion of the products created in the reaction zone is extracted through a nozzle into a high‐acuum apparatus to form a freely propagating molecular bea…
Silicon Nanostructures and PhotoluminescenceLaser-induced spectroscopy and plasmaLaser-Ablation Synthesis of Nanoparticles
Keun‐Soo Kim、Dong Jae Bae、Jung Rae Kim 等 9 位作者2002-12-17Advanced Materials
A rigorous method to engineer the electronic structure of carbon nanotubes from metallic to semiconducting is reported (see inside front cover). An intramolecular junction in carbon nanotube is fabricated, where half of the nanotube is masked by a silicon oxide thin film. Functionalization of the nanotube by atomic hy…
Carbon Nanotubes in CompositesFuel Cells and Related MaterialsDiamond and Carbon-based Materials Research
Wei Liu、Zinghang Zhang、J P Liu 等 8 位作者2002-12-17Advanced Materials
Nanocomposite thin films (see Figure) that are prepared by sputtering and heat treatment demonstrate exchange coupling and remanence enhancement. A high remanence of J r = 1.31 T and a maximum energy product of ( B H ) max = 203 kJ m –3 are achieved. These multilayer films consist of magnetically hard Nd 2 Fe 14 B‐typ…
Magnetic properties of thin filmsMagnetic Properties of AlloysSuperconducting Materials and Applications
Do-Il Kong、Chan Eon Park2002-12-17Chemistry of Materials
Exfoliation behavior of clay layers in epoxy−clay nanocomposites was studied with the electronegativities of aromatic diamine curing agents and curing temperatures. While faster gelation in the extragallery region accelerated by much more reactive aromatic diamine curing agents (1, 3-phenylendiamine (PDA) and 4, 4‘-me…
Polymer Nanocomposites and PropertiesEpoxy Resin Curing ProcessesSynthesis and properties of polymers
Luís D. Carlos、Rute A. S. Ferreira、José P. Rainho 等 4 位作者2002-12-17Advanced Functional Materials
Abstract A fine‐tuning of the emission chromaticity from red to green is reported for organic–inorganic nanostructured hybrids co‐doped with Eu 3+ , Tb 3+ , and Tm 3+ . Raising the temperature from 200 to 300 K changes the color coordinates smoothly from the yellowish–green region of the chromaticity diagram towards t…
Organic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsLanthanide and Transition Metal Complexes
M. Li、Stephen Mann2002-12-17Advanced Functional Materials
Abstract The water‐induced crystallization of alkylbenzenesulfonate‐coated amorphous calcium carbonate (ACC) nanoparticles in water‐in‐isooctane sodium bis(2‐ethylhexyl)sulfosuccinate (NaAOT) microemulsions at a [H 2 O]/[NaAOT] molar ratio ( w ) of 10:1 produces a range of organized hybrid surfactant–vaterite nanostru…
Surfactants and Colloidal SystemsCalcium Carbonate Crystallization and InhibitionCephalopods and Marine Biology
Melissa Sander、R. Gronsky、T. Sands 等 4 位作者2002-12-17Chemistry of Materials
Arrays of bismuth telluride (Bi 2 Te 3 ) nanowires with diameters of ∼25, ∼50, and ∼75 nm have been produced by electrochemical deposition into porous anodic alumina templates. Scanning electron microscopy confirms that the nanowire arrays are dense with a narrow distribution of nanowire diameters. The structure of th…
Advanced Thermoelectric Materials and DevicesThermal properties of materialsAnodic Oxide Films and Nanostructures
Takafumi Kido、Yuichi Ikuta、Yukinari Sunatsuki 等 6 位作者2002-12-17Inorganic Chemistry
A cyclic cylindrical 3d-4f tetranuclear structure, in which the 3d and 4f magnetic ions are arrayed alternately, has been found to be a suitable molecular design to produce a large magnetic moment and large magnetic anisotropy. Complexes 3-10 with the chemical formula [MLLn(hfac)2]2 ((MII, LnIII) = (Cu, Eu) (3), (Cu,…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal-Catalyzed Oxygenation Mechanisms
Jie Cao、Jeff W. Kampf、M. David Curtis2002-12-17Chemistry of Materials
The synthesis and characterization of several co-oligomers, 5,5‘-bis(4,4‘-dialkyl-2,2‘-bithiazol-5-yl)-(3,4,3‘,4‘-bis(ethylenedioxy)-2,2‘-dithienyl) (AT 2 A), 5,5‘-bis(3,4-ethylenedioxythien-2-yl)-4,4‘-dibutyl-2,2‘-bithiazole (TBT), and 5,5‘-bis(3,4,3‘,4‘-bis(ethylenedioxy)-2,2‘-dithien-5-yl)-4,4‘-dibutyl-2,2‘-bithiaz…
Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications