Myrtil L. Kahn、R. Ballou、P. Porcher 等 5 位作者2002-01-18Chemistry - A European Journal
Numerous compounds in which a paramagnetic LnIII ion is in an exchange interaction with a second spin carrier, such as a transition metal ion or an organic radical, have been described. However, except for GdIII, very little has been reported about the magnitude of the interactions. Indeed, for these ions both the lig…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Todd Strother、Tanya Knickerbocker、John N. Russell 等 6 位作者2002-01-18Langmuir
We report a new scheme for attachment of functionalized organic molecules to polycrystalline diamond films. In this scheme, ultraviolet light is used to cause a local reaction between a hydrogen-terminated diamond surface and organic molecules present as a thin overlayer liquid film. Comparison of functionalized alken…
Semiconductor materials and devicesElectronic and Structural Properties of OxidesDiamond and Carbon-based Materials Research
Yi Lin、Apparao M. Rao、Bindu Sadanadan 等 5 位作者2002-01-18The Journal of Physical Chemistry B
Multiple-walled carbon nanotubes (MWNTs) produced using the chemical vapor deposition method were functionalized via attaching aminopolymer poly(propionylethylenimine- co -ethylenimine) to the nanotubes. Two different reaction conditions based on acylating the nanotube-bound carboxylic acids and on directly heating na…
Nanotechnology research and applicationsFullerene Chemistry and ApplicationsCarbon Nanotubes in Composites
E. J. Melé、Petr Král2002-01-18Physical Review Letters
The threefold symmetry of planar boron nitride (BN), the III-V analog to graphene, prohibits an electric polarization in its ground state, but this symmetry is broken when the sheet is wrapped to form a BN nanotube. We show that this leads to an electric polarization along the nanotube axis which is controlled by the…
Graphene research and applicationsBoron and Carbon Nanomaterials ResearchFullerene Chemistry and Applications
John A. Capobianco、Fiorenzo Vetrone、J. Christopher Boyer 等 5 位作者2002-01-18OpenAlex
In this paper, we investigate as a function of erbium concentration (1, 2, 5, 10 mol %) the upconversion properties of bulk and nanocrystalline Er 3+ doped cubic Y 2 O 3 . After excitation at short wavelength (488 nm) or with upconversion pumping (815 nm), green and red emissions were observed for both nanocrystalline…
Luminescence and Fluorescent MaterialsLuminescence Properties of Advanced MaterialsGlass properties and applications
A. J. Chung、Michael F. Rubner2002-01-18OpenAlex
This work studied the loading capabilities and release behavior of poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH) multilayer films, using methylene blue dye (MB) as an indicator. PAA/PAH multilayers assembled at pH = 2.5/2.5 loaded MB throughout the multilayers due to available binding sites and a p…
Polymer Surface Interaction StudiesDendrimers and Hyperbranched PolymersMarine Biology and Environmental Chemistry
Mizue Kaneda、T. Tsubakiyama、Anna Carlsson 等 8 位作者2002-01-18OpenAlex
Recently, we have developed a new electron crystallography (EC) method for study of three dimensional (3D) structures of silica-mesoporous materials, and the 3D-structural solutions of MCM-48 and SBA-1, -6, and -16 were briefly reported. The method gives a unique structure solution through the Fourier sum of the 3D-st…
Polyoxometalates: Synthesis and ApplicationsMesoporous Materials and CatalysisZeolite Catalysis and Synthesis
Xun He、David M. Antonelli2002-01-18OpenAlex
Work in mesoporous silica-based materials began in the early 1990s with work by Mobil. These materials had pore sizes from 20-500 A and surface areas of up to 1500 m(2) g(-1) and were synthesized by a novel liquid crystal templating approach. Researchers subsequently extended this strategy to the synthesis of mesoporo…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsMesoporous Materials and Catalysis
Jinsong Liu、Elena E. Sheina、Tomasz Kowalewski 等 4 位作者2002-01-18OpenAlex
Simply changing the solvent or evaporation conditions enables the physical properties of polythiophene block copolymers and polyurethane elastomers to be controlled. The copolymers all have high conductivities as well as excellent film-forming and good mechanical properties, and well-defined nanowires that reach lengt…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsPolymer composites and self-healing
Yadong Yin、Zhiyuan Li、Ziyi Zhong 等 6 位作者2002-01-18OpenAlex
This paper describes a simple and convenient procedure based on the Tollens process for the preparation of silver nanoparticles with a relatively narrow distribution in size. The starting reagents were similar to those commonly used in the electroless deposition of silver. Only under appropriate conditions, mixing of…
Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsElectrochemical Analysis and Applications
Qing Cao、Philippe Lalanne2002-01-18OpenAlex
It is generally admitted that the extraordinary transmission of metallic grating with very narrow slits is mainly due to the excitation of surface plasmons on the upper and lower interfaces of the grating. We show that the surface plasmon contribution is not the prime effect and that waveguide mode resonance and diffr…
Plasmonic and Surface Plasmon ResearchOptical Coatings and GratingsPhotonic Crystals and Applications
Bernard P. Binks、John H. Clint2002-01-18OpenAlex
A theoretical treatment is developed for the wetting of a solid particle at an oil−water interface in terms of the components of the surface energies of all three phases. Calculated oil−water contact angles for a solid of given hydrophobicity with a range of oils of different polarity show good agreement with experime…
Pickering emulsions and particle stabilizationProteins in Food SystemsSurfactants and Colloidal Systems
Anthoula Lazaris、Steven Arcidiacono、Yue Huang 等 9 位作者2002-01-18OpenAlex
Spider silks are protein-based "biopolymer" filaments or threads secreted by specialized epithelial cells as concentrated soluble precursors of highly repetitive primary sequences. Spider dragline silk is a flexible, lightweight fiber of extraordinary strength and toughness comparable to that of synthetic high-perform…
Silkworms and Sericulture ResearchInvertebrate Immune Response MechanismsSilk-based biomaterials and applications
Donald W. Brenner、Olga Shenderova、Judith A. Harrison 等 6 位作者2002-01-18OpenAlex
A second-generation potential energy function for solid carbon and hydrocarbon molecules that is based on an empirical bond order formalism is presented. This potential allows for covalent bond breaking and forming with associated changes in atomic hybridization within a classical potential, producing a powerful metho…
High-pressure geophysics and materialsForce Microscopy Techniques and ApplicationsDiamond and Carbon-based Materials Research
Roy Shenhar、Ronald Beust、Stefan Hagen 等 7 位作者2002-01-17Journal of the Chemical Society Perkin Transactions 2
Five polycyclic aromatic hydrocarbons of the C26 series having similar bonding structure yield dianions upon reduction with lithium metal. Anisotropy changes, revealed from an advanced charge distribution analysis performed on these dianions, show a correlation to the bonding structure of the dianions. Electron counti…
Porphyrin and Phthalocyanine ChemistrySynthesis and Properties of Aromatic CompoundsPhotochemistry and Electron Transfer Studies
Claudio De Rosa、Finizia Auriemma、Giovanni Talarico 等 6 位作者2002-01-17Macromolecules
A structural analysis of copolymers of syndiotactic polypropylene with small amounts of 13 C-enriched ethylene, in the range 0.4−2.6 mol %, is reported. X-ray diffraction and solid-state 13 C NMR CPMAS data indicate that the as-prepared copolymer samples are crystallized in the conformationally disordered modification…
Organometallic Complex Synthesis and CatalysisFiber-reinforced polymer compositesPolymer crystallization and properties
Rosa M. Claramunt、Dolores Santa María、Lourdes Infantes 等 5 位作者2002-01-17Journal of the Chemical Society Perkin Transactions 2
A new polymorph of 4-phenylimidazole 1a has been characterised by X-ray crystallography. Both polymorphs present a secondary structure of chains, and the observed differences in the topology of their crystal packing are related to the conformational differences in the primary and secondary structural levels. NMR exper…
Synthesis and Characterization of Heterocyclic CompoundsSynthesis and Reactivity of HeterocyclesPorphyrin and Phthalocyanine Chemistry
Benjamin J. Coe、J. Arthur Harris、Bruce S. Brunschwig2002-01-17The Journal of Physical Chemistry A
A series of 20 ruthenium(II) complex salts, known to exhibit large molecular static first hyperpolarizabilities β 0 [HRS] from hyper-Rayleigh scattering measurements on acetonitrile solutions at 298 K (Coe, B. J.; et al. Inorg. Chem . 1997, 36, 3284; 1998, 37, 3391; J. Chem. Soc., Dalton Trans . 1999, 3617), have been…
Nonlinear Optical Materials ResearchSolid-state spectroscopy and crystallographyPhotochemistry and Electron Transfer Studies
Rolf Schmidt、Tongfeng Zhao、John-Bruce Green 等 4 位作者2002-01-17Langmuir
We report the synthesis of grafted polystyrene (PS) films on gold via a surface-initiated polymerization strategy. The polymerization proceeded by a “grafted-from” strategy in which the polystyrene grew by free-radical polymerization from a surface-bound photoinitiator. These experiments exploited the spontaneous form…
Molecular Junctions and NanostructuresMarine Biology and Environmental ChemistryPolymer Surface Interaction Studies
Bhadresh R. Rami、Jayant B. Udgaonkar2002-01-17Biochemistry
Structural analysis of the initial steps in protein folding is difficult because of the swiftness with which these steps occur. Hence, the link between initial polypeptide chain collapse and formation of secondary and other specific structures remains poorly understood. Here, an equilibrium model has been developed fo…
Enzyme Structure and FunctionProtein Structure and DynamicsProtein purification and stability