Materials Literature
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First-principles density-functional calculations for graphene and defective graphene are used to examine when the quasi-two-dimensional electrons near the Fermi energy in graphene could be represented by massless fermions obeying a Dirac-Weyl (DW) equation. The DW model is found to be inapplicable to defective graphen…
In order to disperse silicon carbide (SiC) nanoparticles homogeneously in a non-aqueous medium, the surface of SiC nanoparticles needs to be modified via surface organic functionalization. A method of SiC nanoparticle surface modification by grafting of polyacetals via inorganic-organic composite coating was developed…
We present herein a rational approach to probe the torsional strain-induced electronic transition energy Eii variation of individual SWNTs by resonant Raman spectroscopy (RRS). When a SWNT was manipulated by AFM tip through a path perpendicular to SWNT axis, both torsional and uniaxial strain would be introduced in SW…
Mesoporous silica with Ia 3 d structure has been successfully prepared utilizing a triblock copolymer (EO 20 PO 70 EO 20 )−acetate mixture for structure direction in aqueous solution over a wide pH range, even above the isoelectric point of silica, where the pH value could be finely tuned by varying the concentration…
The coordination chemistry of the tetradentate pyridyl-thiazole (py-tz) N-donor ligand 6,6'-bis(4-phenylthiazol-2-yl)-2,2'-bipyridine (L1) has been investigated. Reaction of L1 with equimolar copper(II) ions results in the formation of the single-stranded mononuclear complex [Cu(L1)(ClO4)2] (1), whereas reaction with…
Author: Maier, H. et al.; Genre: Journal Article; Issued: 2007; Open Access; Keywords: 21st IAEA Fusion Energy Conference, Chengdu, 2006-10-16 to 2006-10-21; Title: Tungsten and Beryllium Armour Development for the JET ITER-like Wall Project
Purpose The motivation for this work is to establish a model that not only includes the main factors resulting in macrosegregation but also retains simplicity and consistency for the sake of potential application in casting practice. Design/methodology/approach A mathematical model for the numerical simulation of ther…
Abstract The radiation‐induced crosslinking, compatibility, and surface modification of low density polyethylene/ethylene vinyl acetate blends (LDPE/EVA) were investigated. The structural and physical properties were characterized in terms of gel content, hot set, mechanical properties, contact angle, and surface free…
The Heusler alloys Co 2 MnSi and NiMnSb are predicted to be 100% spin-polarized and are leading candidate materials for spin-injection and detection in hybrid spintronic devices. Co 2 MnSi is lattice matched with GaAs, whereas NiMnSb is strongly mismatched to GaAs. Here, we study the temperature and thickness dependen…
Characteristic features of the crystal structures of mercury oxohalides, chalcohalides and related compounds are surveyed. The structures of these compounds are described using both the traditional way and a modern approach based on the identification of stable building blocks coupled with the analysis of their packin…
Abstract The effects of synthesis methods and reaction conditions on the crystal morphological structures and thermal degradation behavior of hydrotalcites have been studied by X‐ray diffraction (XRD), transmission electron microscopy (TEM), particle size analysis (PSA), and differential thermal analysis (DTA). The fl…
Abstract In this article, a nitrogen–phosphorus composite flame retardant, melamine phosphate (MP), was synthesized in a solution of phosphoric acid/macromolecular charring agent, polyamide 6 (PA6). With the progress of the phosphoric acid–melamine reaction producing MP, the acidity of this system decreased and the or…
The reduction of the Ag(111)-p(4x4)-O surface oxide with CO was used to study the restructuring of the surface during reaction. Scanning tunneling microscopy images taken during the reaction show the formation of Ag islands and pits within the reacted areas surrounded by unreacted p(4x4)-O. The number of Ag adatoms in…
The phonon symmetry of a series of Aurivillius compounds ${[{\mathrm{Bi}}_{2}{\mathrm{O}}_{2}]}^{2+}$${[{A}_{n\ensuremath{-}1}{B}_{n}{\mathrm{O}}_{3n+1}]}^{2\ensuremath{-}}$ is studied by a site symmetry analysis of bulk crystals followed by the consecutive analysis of their common structural subunits, i.e., the metal…
Abstract Three new thioantimonate(III) complexes [Ni(1,2‐PDA) 3 ]Sb 4 S 7 ( 1 ) (1,2‐PDA = 1,2‐propanediamine), [dmenH 2 2+ ]Sb 8 S 13 · H 2 O ( 2 ) (dmen = N , N ‐dimethylethylenediamine), and [deenH 2 2+ ]Sb 10 S 16 · H 2 O ( 3 ) (deen = N , N ‐diethylethylenediamine), prepared under solvothermal conditions, have be…
Investigation into the effect on the rheological, physico – mechanical and swelling properties of natural rubber vulcanizates using coconut fibre as fillers were carried out. The coconut fibre was characterized in terms of pH, moisture content, ash content, loss on ignition, conductivity, particle size and surface are…
Nanopowder of yttrium aluminum garnet (YAG, Y3Al5O12) doped with neodymium ions (Nd:YAG) was prepared in the water/cetyltrimethylammonium bromide/1-butanol/n-heptane system. Aluminum, yttrium, and neodymium nitrates were used as starting materials, and ammonia was used as a precipitating agent. Coprecipitate hydroxide…
Reactions between [M'(III)(CN)(6)](3-) anions (M' = Co, Cr, or Fe) and mononuclear complexes of M(II) ions (M = Cr, Mn, Co, Ni, or Zn) produce a family of pentanuclear clusters {[M(tmphen)(2)](3)[M'(CN)(6)](2)]}. The core of the clusters is formed by five metal ions that are bridged through six CN- linkers into a trig…
Abstract We synthesized a novel low‐band‐gap, conjugated polymer, poly[4,7‐bis(3′,3′‐diheptyl‐3,4‐propylenedioxythienyl)‐2,1,3‐benzothiadiazole] [poly(heptyl 4 ‐PTBT)], consisting of alternating electron‐rich, diheptyl‐substituted propylene dioxythiophene and electron‐deficient 2,1,3‐benzothiadiazole units, and its ph…
We have performed bulk and surface-sensitive inelastic x-ray scattering experiments on liquid indium with 3 meV energy resolution. The experimental data are well reproduced within a generalized hydrodynamic model including structural and microscopic relaxation processes. We find a longitudinal viscosity of 22 mPa s in…