Ultrafast laser excitation of spin waves by permanent modification of the exchange bias interaction in IrMn/Co
This paper has been withdrawn by the authors due to a critical error discovered in Figures 1, 2 and 4.
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Thermal Conductivity of Nanotubes: Effects of Chirality and Isotope Impurity
We study the dependence of thermal conductivity of single walled nanotubes (SWNT) on chirality and isotope impurity by nonequilibrium molecular dynamics method with accurate potentials. It is found that, contrary to electronic conductivity, the thermal conductivity is insensitive to the chirality. The isotope impurity…
Discrete model for laser driven etching and microstructuring of metallic surfaces
We present a unidimensional discrete solid-on-solid model evolving in time using a kinetic Monte Carlo method to simulate micro-structuring of kerfs on metallic surfaces by means of laser-induced jet-chemical etching. The precise control of the passivation layer achieved by this technique is responsible for the high r…
Coaxial Electrospinning of (Fluorescein Isothiocyanate-Conjugated Bovine Serum Albumin)-Encapsulated Poly(ε-caprolactone) Nanofibers for Sustained Release
As an aim toward developing biologically mimetic and functional nanofiber-based tissue engineering scaffolds, we demonstrated the encapsulation of a model protein, fluorescein isothiocyanate-conjugated bovine serum albumin (fitcBSA), along with a water-soluble polymer, poly(ethylene glycol) (PEG), within the biodegrad…
Yb14MnSb11: New High Efficiency Thermoelectric Material for Power Generation
Thermoelectric materials provide a key solution to energy problems through the conversion of heat into electrical energy. We report that the complex Zintl compound, Yb 14 MnSb 11, breaks a 2-decade stagnation in high-temperature (>900 K), p-type materials development for thermoelectric power generation. This material…
Crystal structure of Homo sapiens PTD012 reveals a zinc‐containing hydrolase fold
The human protein PTD012 is the longer product of an alternatively spliced gene and was described to be localized in the nucleus. The X-ray structure analysis at 1.7 A resolution of PTD012 through SAD phasing reveals a monomeric protein and a novel fold. The shorter splice form was also studied and appears to be unfol…
Viscoelastic effects on early stage of spinodal decomposition in dynamically asymmetric polymer blends
Spinodal decomposition induced by a rapid pressure change was investigated for a dynamically asymmetric polymer blend [deuterated polybutadiene (DPB)/polyisoprene (PI)] with a composition of 50/50 wt/wt by using time-resolved small angle neutron scattering. The time change in the scattered intensity distribution with…
Effect of pH on Rheological Properties of Microcrystalline Cellulose Dispersions
The size distribution and morphology of microcrystalline cellulose (MCC) particles and the effect of pH on the rheological properties of their dilute aqueous dispersion were studied. The 0.3 wt% aqueous dispersion of fine particles (89 nm) also showed solid‐like dynamic viscoelastic behavior at low pHs (below pH 3), i…
Structural, Thermodynamic, and Mesomorphic Consequences of Replacing Nitrates with Trifluoroacetate Counteranions in Ternary Lanthanide Complexes with Hexacatenar Tridentate Ligands
The promesogenic hexacatenar tridentate ligands L3(Cn) (I shape) and L4(Cn) (V shape) react with trivalent lanthanide trifluoroacetates, Ln((CF3CO2)3, to give either monometallic [Ln(Li(Cn))(CF3CO2)3] or trifluoroacetato-bridged bimetallic [Ln(Li(Cn))(CF3CO2)3]2 complexes in the solid state, as exemplified by the crys…
Functional finishing of nonwoven fabrics. I. Accessibility of surface modified PET spunbond by atmospheric pressure He/O2 plasma treatment
Abstract The surface of a polyethylene terephthalate (PET) spunbond nonwoven was modified by using atmospheric pressure He/O 2 plasma treatment. Accessibility of the modified PET nonwoven has been investigated in terms of crystallinity, surface chemical composition, hydrophilicity, and dye uptake. Differential scannin…
New method for the synthesis of clay/epoxy nanocomposites
Abstract A new liquid–liquid method for the synthesis of epoxy nanocomposites was developed. This new method improved the dispersion and exfoliation of the organoclay in the polymer matrix, thus improving the end‐use properties. The microstructure and physical properties of the clay/epoxy nanocomposite synthesized by…
Molecular Orbital Studies of Zinc Oxide Chemical Vapor Deposition: Gas-Phase Radical Reactions
The gas-phase reactions involved in the radical mechanism for zinc oxide chemical vapor deposition have been examined by ab initio and density functional calculations. Geometries of reactants, transition structures, intermediate complexes, and products have been optimized with B3LYP/6-31G(d), and energetics have been…
Tetrathiafulvalene‐Based Podands for Pb2+ Recognition
Abstract The synthesis and design optimization of a series of new redox‐reponsive ligands built around the tetrathiafulvalene electroactive core and incorporating two to four pendant polyether binding sites are described. A comparative study of the recognition properties of these podand‐TTFs forlead( II ) has been car…
Ascorbic Acid Oxidation at Nonmodified and Copper‐Modified Polyaniline and Poly‐ortho‐methoxyaniline Coated Electrodes
Abstract The electrochemical oxidation of ascorbate ions is comparatively studied at polyaniline (PANI) and poly‐ ortho ‐methoxyaniline (POMA) layers in absence and presence of electrodeposited copper species. In comparison to PANI, POMA layers allow decreasing the overpotential necessary for driving the ascorbate oxi…
Synthesis and Characterization of Novel Siloxyalanes
The siloxyalanes [(Et 3 SiOAlH 2 ) 2 AlH 3 ] n ( 1 ), [ t BuMe 2 SiOAlH 2 ] 2 ( 2 ), [( t BuMe 2 SiO) 2 AlH] 2 ( 3 ), and [( t BuMe 2 SiO) 5 Al 2 H] ( 4 ) have been synthesized and characterized by IR and NMR spectroscopic means. By X-ray diffraction studies on single crystals it was established that molecule 1 is a c…
Structures of S. aureus thymidylate kinase reveal an atypical active site configuration and an intermediate conformational state upon substrate binding
Methicillin-resistant Staphylococcus aureus (MRSA) poses a major threat to human health, particularly through hospital acquired infection. The spread of MRSA means that novel targets are required to develop potential inhibitors to combat infections caused by such drug-resistant bacteria. Thymidylate kinase (TMK) is at…
Role of pretreatment with potassium permanganate and urea on mechanical and degradable properties of photocured coir (Cocos nucifera) fiber with 1,6‐hexanediol diacrylate
Abstract Coir fibers were modified with 1,6‐hexanediol diacrylate (HDDA) using ultraviolet (UV) radiation. Concentration of HDDA, soaking time, and radiation dose were optimized and found to be 30% HDDA in methanol along with photoinitiator Irgacure‐500 (2%) and 120 min of soaking time registered as the better perform…
Polar and chemical states at a nanometer scale in aPbSc1∕2Nb1∕2O3−PbTiO3system investigated by Raman spectroscopy
We have investigated the whole phase diagram of ${\mathrm{PbSc}}_{1∕2}{\mathrm{Nb}}_{1∕2}{\mathrm{O}}_{3}\ensuremath{-}{\mathrm{PbTiO}}_{3}$ (PSN-PT) solid solution by Raman scattering and compared the results to our recent x-ray and theoretical study on this system [R. Haumont et al., Phys. Rev. B 71, 104106 (2005)].…
OPTIMIZATION OF ELECTROSPINNING PROCESS PARAMETERS FOR TISSUE ENGINEERING SCAFFOLDS
The goal of the current study was to optimize important process parameters for electrospinning polycaprolactone (PCL) for growing 3T3 fibroblasts. We hypothesized that the smallest obtainable fiber diameter would provide the best cell growth kinetics and we tested this hypothesis for three different process parameters…
C13NMR spectroscopy of carbon nanohorns
We report the results of a carbon-13 nuclear magnetic resonance spectroscopic investigation of the structure of carbon nanohorn aggregates (CNHs). The results show that CNHs consist of two components, characterized by different chemical shifts and spin lattice relaxation $({T}_{1})$ behavior. The first component has a…