Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract A novel thermosetting polyurethane (TSPU)/organic montmorillonite (OMMT) nanocomposite has been synthesized. N ‐diamino octadecyl trimethyl ammonium chloride (DODTMAC) was used as an intercalation agent to treat Na + ‐montmorillonite (MMT) and form a novel kind of OMMT. Fourier transform infrared spectroscopy…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTQuantifying Crystalline Fraction within Polymer SpherulitesKonstantinos G. Gatos, Chrysa Minogianni, and Costas GaliotisView Author Information Institute of Chemical Engineering and High Temperature Chemical Processes, Foundation fo…
Binary SmH(3) (trigonal, a=656.7(3), c=680.1(3) pm, P$\bar 3$c1, Z=6), ternary SmMg2H7 (tetragonal, a=626.47(6), c=937.2(2) pm, P4(1)2(1)2, Z=4) and the corresponding deuterides SmD3 (a=653.9(1)m, c=676.7(2) pm) and SmMg2D7 (a=624.10(1), c=934.81(2) pm) have been prepared by hydrogenation (deuteration) of elemental sa…
The adsorption, diffusion and desorption of chlorine on and from stoichiometric, reduced and partially reduced (defective) rutile TiO2{110} are investigated using ab initio density functional theory (DFT) calculations. Theoretical results are compared with experimental investigations, and microkinetic simulations base…
Tris(bipyridine)ruthenium(II) is used as a templating agent to insert palladium(II) into three-dimensional oxalate-based networks. The templated-assembly of [Ru(bpy)(3)][Pd(2)(ox)(3)] (Pd(2)) and [Ru(bpy)(3)][PdMn(ox)(3)] (PdMn) is described. The latter compound is structurally characterized by powder X-ray diffractio…
The structure of hexacatenar bent-shape molecules has been systematically modified in order to determine the main molecular factors responsible for the appearance of the axially polar columnar mesophase. It was found that the stability of the polar phase is very sensitive to the subtle modifications of the molecular s…
To test predictions about the activity of Ru catalysts the RuO 2 (110) surface was investigated in an oxygen atmosphere at ambient pressure using scanning tunneling microscopy (STM). Epitaxial RuO 2 (110) films were grown on a Ru(0001) sample following an established preparation technique from ultrahigh vacuum (UHV) i…
Abstract Two approaches to transition‐temperature engineering in liquid crystalline oligothiophenes are described: (i) substitution at the aromatic core with two identical branched alkyl chains and (ii) desymmetrization of the molecule with two alkyl substituents of different length or structure. Key steps in the synt…
We put forward a scheme for bridging the length and time scales for soft composite materials consisting of high functionality star polymers and chemically identical polymer chains of smaller size, dissolved into a good or athermal solvent. By employing monomer-level computer simulations and invoking arguments from sca…
Abstract Three types of polypropylene (PP) with different intrinsic toughness were used to study the mechanical properties and morphologies of the PP composites filled with single‐filler and hybrid‐filler of calcium carbonate particles. The calcium carbonate particles used were with average particle sizes of 25 μm (CC…
We have constructed a phase diagram for DNA-modified microsphere suspensions based on experimental and theoretical studies. The system is comprised of 1 microm red fluorescent colloids functionalized with strands of an identical oligonucleotide sequence and 1 microm green fluorescent colloids functionalized with the c…
We studied the Raman spectra of 21 individual suspended single-walled carbon nanotubes (SWNTs) using different excitation laser powers. The results indicate that the laser-heating effect is more significant for suspended SWNT than nanotubes sitting on a substrate. The spectral variations of these individual SWNTs indu…
Our previous study showed quantitative correspondence between the size of ionic aggregates in a Cu-neutralized poly(styrene- ran -methacrylic acid) ionomer (Cu-SMAA) measured from scanning transmission electron microscopy (STEM) images and the sizes determined from X-ray scattering data interpreted using the Yarusso−C…
This paper deals with the possibility of using compounds in the Li−Al−N−H system as hydrogen storage materials. First, the LiAl(NH 2 ) 4 phase is prepared from LiAlH 4 reacting in liquid ammonia at room temperature. The thermal decomposition of LiAl(NH 2 ) 4 under primary vacuum leads to the release, at 138 °C, of two…
Novel liquid crystalline materials with fluorinated biphenyl-based bent aromatic cores have been synthesized. The influence of fluorine substitution at the aromatic core and the effects of combining oligosiloxane units and fluorine substitution were studied. The mesophases were investigated by polarizing microscopy, c…
Surface oxidation of Cu(100) in O(2) has been investigated in situ by x-ray photoelectron spectroscopy, x-ray induced Auger electron spectroscopy (XAES), and scanning tunneling microscopy (STM) as a function of surface temperature (T(S)=303-423 K) and O(2) pressure (p(O(2) )=3.7 x 10(-2)-213 mbars). Morphology of the…
Several paramagnetic electron-rich Fe(III) mononuclear arylacetylide complexes of formula [(η 2 -dppe)(η 5 -C 5 Me 5 )Fe(C⋮C−Ar)] + in which Ar represents a functional aryl group were studied by means of multinuclear NMR. All signals detected for the various nuclei were assigned. Hyperfine coupling constants for selec…
Hexokinase catalyzes the phosphorylation of glucose to glucose 6-phosphate by using ATP as a phosphoryl donor. Recently, we identified and characterized an ATP-dependent hexokinase (StHK) from the hyperthermophilic archaeon Sulfolobus tokodaii, which can phosphorylate a broad range of sugar substrates, including gluco…
Abstract To increase the T g in combination with a retained crystallization rate, bis(2‐hydroxyethyl)terephthalate (BHET) was incorporated into poly(butylene terephthalate) (PBT) via solid‐state copolymerization (SSP). The incorporated BHET fraction depends on the miscibility of BHET in the amorphous phase of PBT prio…
Abstract TiO 2 nanorods (NRs) and γ‐Fe 2 O 3 nanocrystals (NCs) passivated with unsaturated long‐chain carboxylic acids, namely 10‐undecylenic acid (10UDA) and oleic acid (OLEA), are covalently anchored to Si(100) at room temperature by UV‐light‐driven reaction of hydrogenated silicon with the carbon–carbon double bon…