Materials Literature
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The thermal conductivity and thermoelectric power of a single carbon nanotube were measured using a microfabricated suspended device. The observed thermal conductivity is more than 3000 W/K m at room temperature, which is 2 orders of magnitude higher than the estimation from previous experiments that used macroscopic…
The soaps of alkaline earth's and transition elements and closed ‘d’ orbitals were prepared by the double decomposition method by the reaction between metallic salts and sodium palmitate. The thermal stability of these soaps was studied in order to throw the light on their suitability for using as catalysts or lubrica…
Abstract Fiber‐forming poly(urethane semicarbazide)s were prepared with poly(butylene adipate)glycol as soft‐segment domains and hexamethylene diisocyanate/terephthalic dihydrazide as hard‐segment domains. The hard‐segment content was varied via variations in the polyol/isocyanate molar ratio, and the films were chara…
Recent developments in NMR have extended the size range of proteins amenable to structural and functional characterization to include many larger proteins involved in important cellular processes. By applying a combination of residue-specific isotope labeling and protein deuteration strategies tailored to yield specif…
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…