Materials Literature
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Eu-doped nanocrystalline Lu 2 O 3 with different particle sizes was prepared by combustion synthesis. The local structures around the rare-earth Lu and Eu ions were studied by using both Lu and Eu L 3 edge X-ray absorption spectroscopy. According to the extended X-ray absorption fine structure (EXAFS) analysis, detail…
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The topotactic reduction of La0.5Sr0.5MnO3 leads to ordering of the anionic vacancies in the La0.5Sr0.5MnO2.5 composition. The isolated material, which is isostructural with Sr2Fe2O5, crystallises in the brownmillerite structural type with unit cell parameters a=0.54117(3), b=1.67608(12), c=0.54004(3) nm and space gro…
Abstract Well‐defined polystyrene (PSt), poly(ε‐caprolactone) (PCL) or poly(2‐methyloxazoline) (POx) based polymers containing mid‐ or end‐chain 2,5‐ or 3,5‐dibromobenzene moieties were prepared by controlled polymerization methods, such as atom transfer radical polymerization (ATRP), ring opening polymerization (ROP)…
Thin films of the charge-ordered ${\mathrm{Pr}}_{0.5}{\mathrm{Ca}}_{0.5}\mathrm{Mn}{\mathrm{O}}_{3}$ (PCMO) compound have been deposited on (001)-oriented ferroelectric $(1\ensuremath{-}x)\mathrm{Pb}({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}){\mathrm{O}}_{3}\ensuremath{-}x\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ $(x\ensur…
Abstract A novel thermosetting polyurethane (TSPU)/organic montmorillonite (OMMT) nanocomposite has been synthesized. N ‐diamino octadecyl trimethyl ammonium chloride (DODTMAC) was used as an intercalation agent to treat Na + ‐montmorillonite (MMT) and form a novel kind of OMMT. Fourier transform infrared spectroscopy…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTQuantifying Crystalline Fraction within Polymer SpherulitesKonstantinos G. Gatos, Chrysa Minogianni, and Costas GaliotisView Author Information Institute of Chemical Engineering and High Temperature Chemical Processes, Foundation fo…
Binary SmH(3) (trigonal, a=656.7(3), c=680.1(3) pm, P$\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…