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Functionalization and Extraction of Large Fullerenes and Carbon-Coated Metal Formed during the Synthesis of Single Wall Carbon Nanotubes by Laser Oven, Direct Current Arc, and High-Pressure Carbon Monoxide Production Methods

Anil K. Sadana、Feng Liang、Bruce E. Brinson 等 8 位作者2005-02-22The Journal of Physical Chemistry B

Large fullerenes and carbon-coated metal nanoparticles that are formed during the synthesis of carbon nanotubes have been functionalized by the addition of alkyl radicals and isolated by extraction into chloroform. The soluble, functionalized fullerenes have been isolated from raw single-wall carbon nanotube (SWNT) ma…

Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchFullerene Chemistry and Applications

Heteroleptic Rare Earth Double-Decker Complexes with Naphthalocyaninato and Phthalocyaninato Ligands. General Synthesis, Spectroscopic, and Electrochemical Characteristics

Rongming Wang、Yong Li、Renjie Li 等 10 位作者2005-02-22Inorganic Chemistry

A novel one-pot procedure starting from the corresponding M(acac)3 x nH2O, metal-free phthalocyanine H2Pc', and naphthalonitrile in the presence of DBU in n-octanol has been developed to prepare heteroleptic (naphthalocyaninato)(phthalocyaninato) rare earth double-decker complexes. A series of six sandwich compounds w…

Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms

Interaction of atomic hydrogen with Zn-polar and O-polar ZnO surfaces

María Losurdo、Maria M. Giangregorio2005-02-22Applied Physics Letters

The interaction of Zn-polar and O-polar ZnO surfaces with atomic hydrogen produced by a remote rf plasma source is investigated in situ and in real time using spectroscopic ellipsometry. It is found that the reactivity of ZnO with atomic hydrogen depends on polarity. The interaction of O-polar surfaces with atomic hyd…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsPlasma Diagnostics and Applications

A circuit model for carbon nanotube interconnects: comparative study with Cu interconnects for scaled technologies

Arijit Raychowdhury、Krishnendu Roy2005-02-22OpenAlex

Semiconducting carbon nanotubes (CNT) have gained immense popularity as possible successors to silicon as the channel material for ultra high performance field effect transistors. On the other hand, their metallic counterparts have often been regarded as ideal interconnects for the future technology generations. Owing…

Carbon Nanotubes in CompositesGraphene research and applicationsNanowire Synthesis and Applications

Enhancement of hydrogen physisorption on single-walled carbon nanotubes resulting from defects created by carbon bombardment

Yueyuan Xia、John Zhonghua Zhu、Mingwen Zhao 等 10 位作者2005-02-22Physical Review B

The defect effect on hydrogen adsorption on single-walled carbon nanotubes (SWNTs) has been studied by using extensive molecular dynamics simulations and density functional theory (DFT) calculations. It indicates that the defects created on the exterior wall of the SWNTs by bombarding the tube wall with carbon atoms a…

Carbon Nanotubes in CompositesGraphene research and applicationsHydrogen Storage and Materials

Oxygen Permeability Measurements on Elastomers at Temperatures up to 225 °C

Mathias C. Celina、K.T. Gillen2005-02-22Macromolecules

Oxygen permeability data, vital parameters for understanding and modeling the thermooxidative degradation of polymers, have been determined for various elastomers. Using a novel experimental setup, oxygen permeability through sheet materials was measured for elevated temperatures up to 225 °C. Under these conditions o…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesConcrete Corrosion and Durability

Mechanical Properties of Short, Natural Fiber Hildegardia populifolia-reinforced Styrenated Polyester Composites

A. Varada Rajulu、G. Babu Rao、L. Ganga Devi 等 7 位作者2005-02-22Journal of Reinforced Plastics and Composites

Short, natural fibers belonging to the species Hildegardia populifolia were reinforced in styrenated polyester matrix. The mechanical properties of these polymer composites such as tensile modulus, compression strength at first deformation, flexural modulus, and izod impact strength were determined. The effect of alka…

Natural Fiber Reinforced CompositesAdditive Manufacturing and 3D Printing Technologies

Synthesis and characterization of nanoscale biomimetic polymer vesicles and polymer membranes for bioelectronic applications

Hyo‐Jick Choi、Evan K. Brooks、Carlo Montemagno2005-02-22Nanotechnology

An amphiphilic ABA triblock copolymer was synthesized using poly(2-ethyl-2-oxazoline) (PEtOz) as hydrophilic block [A] and poly(dimethylsiloxane) (PDMS) as hydrophobic block [B]. The cationic ring-opening polymerization of 2-ethyl-2-oxazoline was initiated by benzyl chloride in the presence of NaI. PEtOz–PDMS–PEtOz wa…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsPolymer Surface Interaction Studies

The use of rhodamine 6G and fluorescence microscopy in the evaluation of phospholipid‐based polymeric biomaterials

J Wang、J. D. BARTLETT、A. C. DUNN 等 7 位作者2005-02-22Journal of Microscopy

A technique is described that allows the staining and subsequent visualization of polymers that contain the phosphorylcholine (PC) group. These materials are useful as bulk materials or coatings for the fabrication of medical devices. The staining method employs rhodamine 6G, which can be simply and rapidly applied to…

Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsAnalytical Chemistry and Sensors

Polymer-Filled Nanoporous Silica Aerogels as Hosts for Highly Stable Solid-State Dye Lasers

Á. Costela、Inmaculada García Moreno、Clara Gómez 等 7 位作者2005-02-22The Journal of Physical Chemistry B

New hybrid solid-state dye laser materials based on highly porous silica aerogels have been synthesized. The open porous network of the aerogel was saturated with laser dyes dissolved in appropriate organic monomers, and polymerization took place inside the silica structure. The resulting polymer-filled nanoporous aer…

Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies

Effective pyroelectric response of compositionally graded ferroelectric materials

Shan Zhong、S. P. Alpay、Z.–G. Ban 等 4 位作者2005-02-22Applied Physics Letters

A thermodynamic theory is used to determine the effective pyroelectric coefficients of polarization graded ferroelectrics, with values in excess of 0.1μC∕cm2°C are predicted for various barium strontium titanate thin films. Maximum values closer to 0.4μC∕cm2°C are obtained for a 1μm thick material—compositionally grad…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesOptical and Acousto-Optic Technologies

Evolution in materio: a tone discriminator in liquid crystal

Simon Harding、Julian F. Miller2005-02-22OpenAlex

Intrinsic evolution in evolvable hardware research has hitherto been limited to using standard electronic components as the media for problem solving. However, recently it has been argued that because such components are human designed and intentionally has predictable responses; they may not be the optimal medium to…

Photonic and Optical DevicesLiquid Crystal Research AdvancementsAdvanced Optical Imaging Technologies

Effect of Steps on the Decomposition of CH3O at PdZn Alloy Surfaces

Zhao‐Xu Chen、Kok Hwa Lim、Konstantin M. Neyman 等 4 位作者2005-02-22The Journal of Physical Chemistry B

The decomposition of methoxide (CH(3)O) on a PdZn alloy is considered to be the rate-limiting step of steam re-forming of methanol over a Pd/ZnO catalyst. Our previous density functional (DF) studies (Langmuir 2004, 20, 8068; Phys. Chem. Chem. Phys. 2004, 6, 4499) revealed only a very low propensity of defect-free fla…

Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions

Composite Tectocapsules Containing Porous Polymer Microspheres as Release Gates

Lisa M. Croll、Harald D. H. Stöver、Adam P. Hitchcock2005-02-22Macromolecules

Porous and amphiphilic polymer microspheres were incorporated into polyurea capsules in order to control the release of the core solvents independently of wall formation. While nonpolar poly(divinylbenzene-55) microspheres were simply encapsulated along with the xylene core solvent, the amphiphilic poly(divinylbenzene…

Surfactants and Colloidal SystemsPolymer composites and self-healingPickering emulsions and particle stabilization

Physics of Compaction of Fine Cohesive Particles

A. Castellanos、José Manuel Valverde、M. A. S. Quintanilla2005-02-22Physical Review Letters

Fluidized fractal clusters of fine particles display critical-like dynamics at the jamming transition, characterized by a power law relating consolidation stress with volume fraction increment [${\stackrel{^}{\ensuremath{\sigma}}}_{c}\ensuremath{\propto}(\ensuremath{\Delta}\ensuremath{\phi}{)}^{\ensuremath{\beta}}$].…

Material Dynamics and PropertiesTheoretical and Computational PhysicsGranular flow and fluidized beds

Effect of temperature, pressure, and gas ratio of methane to hydrogen on the synthesis of double-walled carbon nanotubes by chemical vapour deposition

Guangyong Xiong、Yoshiyuki Suda、D Z Wang 等 5 位作者2005-02-22Nanotechnology

Double-walled carbon nanotubes (DWCNTs) were synthesized by chemical vapour deposition using Fe–Mo catalyst supported on magnesium oxide particles. A mixture of gases of methane and hydrogen was used for the growth. The effect of gas pressure, ratio of methane to hydrogen, and growth temperature on the structure, puri…

Carbon Nanotubes in CompositesGraphene research and applicationsSupercapacitor Materials and Fabrication

Structure and Mössbauer Studies of F−O Ordering in Antiferromagnetic Perovskite PbFeO2F

Yoshiyuki Inaguma、Jean−Marc Grenèche、Marie‐Pierre Crosnier‐Lopez 等 6 位作者2005-02-22Chemistry of Materials

The synthesis of PbFeO 2 F is achieved using a solid-state reaction under high pressure. This perovskite crystallizes in SG Pm 3̄ m (No. 221) with a = 0.39991 (1) nm. The Rietveld refinement using powder X-ray diffraction data shows that the mean structure of this compound can be characterized as follows: (1) the Pb i…

Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics

Polychromatic X-ray microdiffraction studies of mesoscale structure and dynamics

Gene E. Ice、B. C. Larson、Wenge Yang 等 8 位作者2005-02-22Journal of Synchrotron Radiation

Polychromatic X-ray microdiffraction is an emerging tool for studying mesoscale structure and dynamics. Crystalline phase, orientation (texture), elastic and plastic strain can be nondestructively mapped in three dimensions with good spatial and angular resolution. Local crystallographic orientation can be determined…

Microstructure and mechanical propertiesForce Microscopy Techniques and ApplicationsAdvanced X-ray Imaging Techniques

Turbogenerator End-Winding Leakage Inductance Calculation Using a 3-D Analytical Approach Based on the Solution of Neumann Integrals

Drago Ban、Damir Žarko、Ivan Mandić2005-02-22IEEE Transactions on Energy Conversion

An analytical technique that can be effectively used for the calculation of the end-winding leakage inductance of a turbogenerator has been presented. It is based on a three-dimensional geometric model of the end-winding region in which each coil is modeled as a set of serially connected straight filaments. The calcul…

Electric Motor Design and AnalysisMagnetic Properties and ApplicationsThermal Analysis in Power Transmission

A soluble and highly functional polyaniline–carbon nanotube composite

Raquel Sainz、Ana M. Benito、M.T. Martı́nez 等 11 位作者2005-02-22Nanotechnology

A completely soluble polyaniline-multi-wall carbon nanotube (CNT-PANI) composite with drastically enhanced conductivity, improved thermal stability, and luminescent behaviour, has been synthesized. The presence of straight multi-wall carbon nanotubes during the polymerization of aniline induces the formation of a more…

Organic Electronics and PhotovoltaicsAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications