Materials Literature
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Abstract We report the deterministic growth of individual single‐crystal organic semiconductor nanowires of silver–tetracyanoquinodimethane (Ag–TCNQ) with high yield (>90%) by a vapor–solid chemical reaction process. Ag–metal films or patterned dots deposited onto substrates serve as chemical reaction centers and a…
The structure of human protein HSPC034 has been determined by both solution nuclear magnetic resonance (NMR) spectroscopy and X-ray crystallography. Refinement of the NMR structure ensemble, using a Rosetta protocol in the absence of NMR restraints, resulted in significant improvements not only in structure quality, b…
Electronic structure of bismuth telluride nanowires with the growth directions [110] and [015] is studied in the framework of the anisotropic effective-mass method using the parabolic band approximation. The components of the electron and hole effective-mass tensors for six valleys are calculated for both growth direc…
Abstract In this work, nanosilica/polypropylene composites containing 1 wt% of silica nanoparticles were prepared by melt mixing in a Thermo Haake internal mixer. Prior compounding, nanosilica was subjected to surface activation using sodium hydroxide (NaOH) solution. The effectiveness of the activation process was ev…
We present a neutron reflectivity study of the internal structure of multilayers made of a weak polyelectrolyte and a neutral component where interactions between adjacent layers are controlled by hydrogen-bonding. We found the degree of interpenetration of polymer layers expressed as the interlayer roughness to be st…
Bilayer nanostructured poly(3,4-ethylenedioxythiophene) (PEDOT) and polyaniline (PANI) conducting polymer composites have been successfully prepared by oxidative polymerization of the parent monomers, aniline (An) and 3,4-ethylenedioxythiophene (EDOT), in aqueous solutions of p -toluenesulfonic acid ( p -TSA). As the…
Peroxoniobate species are found whenever niobium oxides are employed as photocatalysts or used to sequester radionuclides. The reactions of [Nb6O19]8− and [Nb10O28]6− with hydrogen peroxide each behave differently, and the first example of a peroxopolyoxoniobate species, [N(CH3)4]5[H3Nb6O13(O(I)2)6]⋅9.5 H2O, was struc…
Abstract RAFT grafted montmorillonite (MMT) clays [i.e., N,N ‐dimethyl‐ N ‐(4‐(((phenylcarbonothioyl)thio)methyl)benzyl)ethanammonium‐MMT (PCDBAB‐MMT) and N ‐(4‐((((dodecylthio)carbonothioyl)thio)methyl)benzyl)‐ N,N ‐dimethylethanammo‐nium‐MMT (DCTBAB‐MMT)] of various loadings were dispersed in styrene (S) monomer and…
Abstract Aminopropylisobutyl polyhedral oligomeric silsesquioxane (POSS) was used to prepare a POSS‐containing reversible addition‐fragmentation transfer (RAFT) agent. The POSS‐containing RAFT agent was used in the RAFT polymerization of N ‐isopropylacrylamide (NIPAM) to produce tadpole‐shaped organic/inorganic hybrid…
In order to achieve a stable, long-term operation of flexible electronic devices, it is necessary to firmly fix semiconductive conjugated polymers to plastic substrates, thus preventing their damage against delamination or chemical treatments. Surface-initiated Kumada catalyst-transfer polycondensation of 2-bromo-5-ch…
Thermodynamic parameters of configurons – elementary excitations resulting from broken bonds in amorphous materials – are found from viscosity-temperature relationships. Glass-liquid transition phenomena and most popular models are described along with the configuron model of glass transition. The symmetry breaking, w…
An original and low cost method for the fabrication of patterned surfaces bioinspired from butterfly wings and lotus leaves is presented. Silica-based sol-gel films are thermally imprinted from elastomeric molds to produce stable structures with superhydrophobicity values as high as 160 degrees water contact angle. Th…
We have measured the complex permeability and permittivity spectra of Co2Z/epoxy composites for different volume concentrations Vcvarying from 0.2 to 0.6. The effects of Vcon matching and bandwidth properties have been studied. For Vcges 0.5, there exist two matching points. The first matching, occurring away from the…
The systematic and controlled reduction of vanadium oxide nanoscrolls results in routes to the large-scale preparation of nanostructures of the interesting and useful materials rutile VO 2 and corundum V 2 O 3 . Vanadium oxide (V 2 O 5−δ ) nanoscrolls, prepared by the hydrothermal treatment of aged suspensions of V 2…
Surface oxidation of Cu(100) has been investigated by variable temperature scanning tunneling microscopy and quantitative x-ray photoelectron spectroscopy as a function of O(2) pressure (8.0x10(-7) and 3.7x10(-2) mbar) at 373 K. Three distinct phases in the initial oxidation of Cu(100) have been observed: (1) the form…
Abstract 3‐Arm star‐block copolymers, (polystyrene‐ b ‐poly(methyl methacrylate)) 3 , (PS‐ b ‐PMMA) 3 , and (polystyrene‐ b ‐poly(ethylene glycol)) 3 , (PS‐ b ‐PEG) 3 , are prepared using double‐click reactions: Huisgen and Diels–Alder, with a one‐pot technique. PS and PMMA blocks with α‐anthracene‐ω‐azide‐ and α‐male…
U-shaped host for OUr guest: Two uranyl–peroxo squares [(UO2)(O2)]4 were incorporated into the hitherto unknown U-shaped “P6W36” Wells–Dawson ion. The 36-tungsto-8-phosphate [Li(H2O)K4(H2O)3{(UO2)4(O2)4-(H2O)2}2(PO3OH)2P6W36O136]25− (see picture) was synthesized by using the poorly investigated precursor [H6P4W24O94]1…
We present the results of ab initio hybrid density-functional calculations of the atomic and the electronic structures of ${\text{LaMnO}}_{3}$ (LMO) and ${\text{La}}_{1\ensuremath{-}{x}_{b}}{\text{Sr}}_{{x}_{b}}{\text{MnO}}_{3}$ (001) surfaces. The total energies obtained from these calculations were used to analyze t…
Nanoporous spherical assemblies of iso-oriented cobalt ferrite nanoparticles with a high surface area were prepared via a normal micelles process. The spherical magnetic assemblies were coated with a silica layer through an inverse micelles route. The microstructure and morphology were studied by X-ray diffraction, tr…
The effective atomic number, Z(eff), the effective electron density, N(el), and kerma have been calculated for some fatty acids and carbohydrates for photon interaction in the extended energy range from 1 keV to 100 GeV using an accurate database of photon-interaction cross sections and the WinXCom program. The signif…