Materials Literature
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The aim of this paper is to gain insight into the observed recovery of electrical activity of B impurities occurring in Porous Silicon (PS) layers exposed to ${\mathrm{NO}}_{2}$ molecules, while addressing the problem of the origin of B passivation in PS. Two possible mechanisms are considered, i.e., that the extra el…
We present results of adsorption measurements for Xe and Ar which confirm experimentally the formation of one-dimensional phases for these gases when adsorbed on the outer surfaces of close-ended single-wall carbon nanotube (SWNT) bundles. The existence of such phases had been predicted in recent computer simulations,…
Abstract We studied tensile behavior of low‐molecular‐weight (MW) polypropylene (PP)/ethylene–propylene rubber (EPR; 70/30) blends from the viewpoint of the MWs of PP and EPR and the compatibility between PP and EPR. The value of the melt flow rate of PP varied from 30 to 700 g/10 min at 230°C. We studied the compatib…
Abstract We carried out a scanning electron microscopy study to investigate the morphology of a polystyrene (PS)/montmorillonite nanocomposite. Monodispersed spherical particles, about 200 nm in diameter, were observed when PS/montmorillonite powder was dispersed in water, whereas planar silicate sheets were found for…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTAntiferromagnetic Ordering in a Helical Triblock Copolymer MesostructureHubert Elbs, Volker Abetz, Georges Hadziioannou, Clarissa Drummer, and Georg KrauschView Author Information Lehrstuhl für Physikalische Chemie II and Bayreuther Zen…
A time-resolved, spectroscopic study of the third-order nonlinear optical response of rare-earth hexagonal manganites $R{\mathrm{MnO}}_{3}$ $(R=\mathrm{Sc},$ Y, Er) was performed in the range of 1.45 to 1.62 eV nearby the first $d--d$ transition in ${\mathrm{Mn}}^{3+}$ ions. The nonlinearity was shown to result in a t…
A new polyimide with covalently incorporated 4,4'-bis-(dialkylaminostyryl)-2,2'-bipyridine chromophores is described which allows the synthesis of the corresponding NLO octupolar metallo-polymer.
Abstract Dimethyl terephthalate (DMT) and ethylene glycol (EG) were used for the preparation of poly(ethylene terephthalate) (PET), and poly(ethylene glycol) (PEG) was added as a soft segment to prepare a PET–PEG copolymer with a shape‐memory function. MWs of the PEG used were 200, 400, 600, and 1000 g/mol, and variou…
The influence of chemical B-site ordering between Sc 3+ and Nb 5+ cations on the properties of the Pb(Sc 1/2 Nb 1/2 )O 3 (PSN) relaxor has been investigated. Depending of the degree of ordering, PSN exhibits different behaviours. For a completely disordered material, a relaxor–ferroelectric phase transition is observe…
Interpretation of the Al K- and LII/III-edges of aluminium oxides: differences between tetrahedral and octahedral Al explained by different local symmetries, J A van Bokhoven, T Nabi, H Sambe, D E Ramaker, D C Koningsberger
The physical and chemical properties of PPI dendrimers' interior were investigated using the fluorescent, solvatochromic probe phenol blue. In aqueous solutions of each generation studied, two discrete dye populations were clearly observed. PPI dendrimers were shown to form a tight, nonpolar association with the vast…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTDirecting Energy Transfer within Conjugated Polymer Thin FilmsJinsang Kim, D. Tyler McQuade, Aimee Rose, Zhengguo Zhu, and Timothy M. SwagerView Author Information Department of Chemistry and Department of Materials Science and Engineering and the Center for Materials…
The synthesis and X-ray characterization of a novel two-dimensional network of copper(II) and nickel(II) heteronuclear complexes with two different thiocyanate groups are reported, together with a preliminary study of the magnetic properties.
Abstract This article presents the results of an experimental study on the preparation and properties of new ternary composites composed of nano‐Al 2 O 3 particles, polyester, and epoxy resin. The ternary composites were prepared by the addition of the nano‐Al 2 O 3 particles in a binary matrix, with elevated viscosit…
Layered double hydroxides (LDHs) with a cation composition of LiAl(2) have a wide range of potential applications as catalysts, catalyst supports, and precursors for refractory oxide materials, including several industrially important lithium aluminate phases. The understanding of the calcination behavior of this grou…
We present the results of a systematic x-ray scattering study of the charge and orbital ordering in the manganite series ${\mathrm{Pr}}_{1\ensuremath{-}x}{\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}$ with $x=0.25,$ 0.4, and 0.5. The temperature dependence of the scattering at the charge and orbital wavevectors, and of the latt…
The motion and shape evolution of viscous drops made from a dilute suspension of tiny, spherical glass beads sedimenting in an otherwise quiescent liquid is investigated both experimentally and theoretically for conditions of low Reynolds number. In the (presumed) absence of any significant interfacial tension, the Bo…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThree-Dimensional Superlattices Built from (M4In16S33)10- (M = Mn, Co, Zn, Cd) Supertetrahedral ClustersCheng Wang, Yuqi Li, Xianhui Bu, Nanfeng Zheng, Olivera Zivkovic, Chung-Sung Yang, and Pingyun FengView Author Information Department of Chemistry, University of Cal…
The jarosites make up the most studied family of {\it kagomé} antiferromagnets. The flexibility of the structure to substitution of the A and B ions allows a wide range of compositions to be synthesised with the general formula AB3(SO4)2(OH)6 (A = Na$^+$, K$^+$, Ag$^+$, Rb$^+$, H3O$^+$, NH4$^+$, 1/2Ba$^{2+}$, and 1/2P…
Group Theory techniques can aid greatly the determination of magnetic structures. The integration of their calculations into new and existing refinement programs is an ongoing development that will simplify and make more rigorous the analysis of experimental data. This paper presents an overview of the practical appli…