Syuji Fujii、David P. Randall、Steven P. Armes2004-11-19Langmuir
Surfactant-stabilized polystyrene (PS) latex particles with a mean hydrodynamic diameter of 155 nm were prepared by aqueous emulsion polymerization using 2,2'-azobis(2-amidinopropane) hydrochloride as a cationic radical initiator. Seeded aqueous emulsion copolymerizations of 2-(dimethylamino)ethyl methacrylate (DMA) a…
Advanced Polymer Synthesis and CharacterizationSurfactants and Colloidal SystemsPickering emulsions and particle stabilization
А. А. Минаков、Dmitry A. Mordvintsev、Christoph Schick2004-11-19Faraday Discussions
Reorganization of semicrystalline polymers on heating is a fast process. For poly(ethylene terephthalate) (PET) heating rates of several thousand Kelvin per second are needed to prevent reorganization of unstable crystals. Utilizing a thin film vacuum gauge as a fast calorimeter we are able to extend the scanning rate…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesThermal and Kinetic Analysis
Hongdian Lu、Yuan Hu、Ling Yang 等 6 位作者2004-11-19Macromolecular Materials and Engineering
Abstract Summary: Halogen‐free, flame retardant low density polyethylene (LDPE) composites, using magnesium hydroxide sulfate hydrate (MHSH) whiskers as a flame retardant, combined with microencapsulated red phosphorous (MRP) as a synergist, have been prepared using a two‐roll mill. Their fire properties were determin…
Polymer Nanocomposites and PropertiesFlame retardant materials and propertiesSilicone and Siloxane Chemistry
Tetsuo Asakura、Kosuke Ohgo、Teppei Ishida 等 6 位作者2004-11-19Biomacromolecules
Bombyx mori silk fibroin molecule is known to exist in two distinct structural forms: silk I (unprocessed silk fibroin) and silk II (processed silk fibroin). Using synthetic peptides, we attempt to explore the structural role played by Ser and Tyr residues on the appearance of silk I structural form of the fibroin. Tw…
Neurobiology and Insect Physiology ResearchAntimicrobial Peptides and ActivitiesSilk-based biomaterials and applications
Christos P. Constantinides、Panayiotis A. Koutentis、J. Schatz2004-11-19Journal of the American Chemical Society
Unrestricted density functional calculations in combination with the broken-symmetry approach and spin-projection methods have been employed to study a series of formally 4n pi antiaromatic linear and angular polyheteroacenes. Calculations show that the linear polyheteroacene molecules have either stable singlet zwitt…
Magnetism in coordination complexesFullerene Chemistry and ApplicationsSynthesis and Properties of Aromatic Compounds
Caroline Salzemann、Isabelle Lisiecki、J. Urban 等 4 位作者2004-11-19Langmuir
In the chemical reduction of copper ions in mixed reverse micelles it is found that a large excess of reducing agent favors the production of a new generation of copper nanocrystals. At low reducing agent concentration, nanocrystals are mostly spherical, while in the supersaturated regime, they have various shapes suc…
Gold and Silver Nanoparticles Synthesis and Applicationsnanoparticles nucleation surface interactionsNanomaterials for catalytic reactions
Yanfa Yan、Gustavo M. Dalpian、Mowafak Al‐Jassim 等 4 位作者2004-11-19Physical Review B
The energetics and electronic structures of basal-plane stacking faults in wurtzite (WZ) ZnO are studied using first-principles density-functional total energy calculations. All the basal-plane stacking faults are found to have very low formations energies. They also introduce a downward shift at the conduction-band m…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Soo‐Hwan Jeong、Ju‐Hye Ko、Jong-Bong Park 等 4 位作者2004-11-19Journal of the American Chemical Society
A chemical route to single-walled carbon nanotubes (SWCNTs) under ambient conditions has been developed. Silica powder was immersed in a mixture solution of ferrocene and p-xylene. After sonication at atmospheric pressure and room temperature, we obtained high-purity SWCNTs. Sonochemical effects may lead to producing…
Carbon Nanotubes in CompositesFullerene Chemistry and ApplicationsNanotechnology research and applications
Anita Swami、PR. Selvakannan、Renu Pasricha 等 4 位作者2004-11-19The Journal of Physical Chemistry B
The single-step synthesis of silver nanoparticles by the reduction of silver ions present in the subphase under alkaline conditions by 3-pentadecylphenol (3-PDP) Langmuir monolayer and their assembly into ordered two-dimensional structures is described. The reduction of the silver ions occurs by electron transfer from…
Gold and Silver Nanoparticles Synthesis and ApplicationsMolecular Junctions and NanostructuresMolecular Communication and Nanonetworks
Antonio Tilocca、Annabella Selloni2004-11-19The Journal of Physical Chemistry B
The adsorption and reactivity of methanol on TiO 2 anatase(101) surfaces are studied through first-principles total energy calculations and Car−Parrinello molecular dynamics simulations. The effects of different methanol coverages up to one monolayer and different surface oxidation states are investigated. The most st…
Electrocatalysts for Energy ConversionAdvanced Photocatalysis TechniquesCatalytic Processes in Materials Science
Ameya Bapat、Curtis Anderson、Christopher R Perrey 等 6 位作者2004-11-19Plasma Physics and Controlled Fusion
Single-crystal nanoparticles of silicon, several tens of nanometres in diameter, may be suitable as building blocks for single-nanoparticle electronic devices. Previous studies of nanoparticles produced in low-pressure plasmas have demonstrated the synthesis of nanocrystals 2–10 nm diameter but larger particles were a…
Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsLaser-Ablation Synthesis of Nanoparticles
Alexander B. Morgan、Lih‐Long Chu、Joseph D. Harris2004-11-19Fire and Materials
Polymer-clay nanocomposites are a newer class of flame retardant materials of interest due to their balance of mechanical, thermal and flammability properties. Much more work has been done with natural clays than with synthetic clays for nanocomposite flammability applications. There are advantages and disadvantages t…
Polymer Nanocomposites and PropertiesNatural Fiber Reinforced CompositesFlame retardant materials and properties
B.L. Schottel、John Bacsa、Kim R. Dunbar2004-11-19Chemical Communications
The new compound [Ag(2)(bptz)(3)][AsF(6)](2), prepared from the reaction of bptz with Ag[AsF(6)] in CH(3)CN, is stable in solution as well as the solid-state and exhibits an unprecedented propeller arrangement of three bptz ligands spanning two Ag(i) ions with [AsF(6)](-) anions located in the folds of the cation.
Organometallic Complex Synthesis and CatalysisMetal complexes synthesis and propertiesMagnetism in coordination complexes
Alejandro J. Müller、Julio Albuerne、L. Márquez 等 8 位作者2004-11-19Faraday Discussions
The crystallization kinetics of each constituent of poly(p-dioxanone)-b-poly(epsilon-caprolactone) diblock copolymers (PPDX-b-PCL) has been determined in a wide composition range by differential scanning calorimetry and compared to that of the equivalent homopolymers. Spherulitic growth rates were also measured by pol…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Gabriel Merino、M.A. Mendéz-Rojas、H.I. Beltrán 等 6 位作者2004-11-19Journal of the American Chemical Society
A series of molecules, based on the smallest carbon cluster with one planar tetracoordinate carbon atom, C5(2-), are presented. To gain a better understanding about which electronic factors contribute to their stabilization, several global reactivity indexes, molecular scalar fields, and magnetic responses were calcul…
Fullerene Chemistry and ApplicationsBoron and Carbon Nanomaterials ResearchAdvanced NMR Techniques and Applications
Vanesa Ayala、Eva M. Maya、José M. García 等 6 位作者2004-11-19Journal of Polymer Science Part A Polymer Chemistry
Abstract New polyamides, containing a benzimidazole side group and ethylene oxide moieties in the structural repeat unit, were synthesized by low‐temperature polycondensation. The aim of this design was to obtain polyamides that were more soluble in common organic solvents and hence had better processability than benz…
Epoxy Resin Curing ProcessesMembrane Separation and Gas TransportSynthesis and properties of polymers
Kent A. Nielsen、Won-Seob Cho、Jan O. Jeppesen 等 6 位作者2004-11-19Journal of the American Chemical Society
A calix[4]pyrrole incorporating four appended tetrathiafulvalene (TTF) units has been synthesized, and its receptor abilities toward neutral electron-deficient guests, such as 1,3,5-trinitrobenzene, tetrafluoro-p-benzoquinone, and tetrachloro-p-benzoquinone, have been studied in solution by UV-vis and 1H NMR spectrosc…
Magnetism in coordination complexesMolecular Junctions and NanostructuresOrganic and Molecular Conductors Research
Chun‐Wei Chen、Ming‐Hsien Lee、Stewart J. Clark2004-11-19Nanotechnology
The electronic structures of carbon (C) and boron nitride (BN) nanotubes under a transverse electric field were investigated through the first-principles pseudopotential density-functional theory (DFT) calculations. It was found that band gap modifications occur both in the semiconducting C and BN nanotubes under an e…
Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research
Y. V. Kervennic、D. Vanmaekelbergh、L. P Kouwenhoven 等 4 位作者2004-11-19arXiv
We have developed a technology to reproducibly make gaps with distance control on the single atom scale. The gold contacts are flat on the nanometre scale and are fabricated on an oxidized aluminium film that serves as a gate. We show that these contacts are clean and can be stabilized via chemical functionalization.…
Materials Science
K. Conlon、Hongjie Luo、D. Viehland 等 8 位作者2004-11-19Physical Review B
Spatially resolved neutron diffraction as a function of crystal depth in $\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}$ reveals the presence of a distinct near-surface region where a strong distortion in the lattice exists. A dramatic change in both the lattice constant and the Bragg peak intens…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisElectronic and Structural Properties of Oxides