Materials Literature
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Ab initio calculations of the magnetic shape-memory alloy ${\mathrm{Ni}}_{50}{\mathrm{Mn}}_{x}{\mathrm{Al}}_{50\ensuremath{-}x}$ with $0\ensuremath{\leqslant}x\ensuremath{\leqslant}50$ were carried out using density functional theory and PAW potentials. The alloy is ferromagnetic in the range from 14 to 31 at.$%$ $\ma…
Sequential surface chemical reactions of poly(acrylic acid- co - N -isopropylacrylamide) [poly(AAc- co -NIPAAm)] with AAc contents of 5, 10, and 15 mol %, of which carboxyl groups were previously activated by 1-ethyl-3-(3-(dimethylamino)propyl)carbodiimide hydrochloride (EDC), plus poly(vinylamine hydrochloride) throu…
Abstract A simple technique employing differential scanning calorimetry (DSC) to investigate the molecular structure of ethylene copolymers is presented in this paper. Three commercial Ziegler–Natta catalysed linear low density polyethylenes (LLDPE) and a commercial single‐site catalysed very low density polyethylene…
Abstract Two series of mixed phthalocyaninato and porphyrinato rare earth( III ) triple‐decker complexes [M 2 (Pc)(TClPP) 2 ] ( 1a − 10a ) and [M 2 (Pc) 2 (TClPP)] ( 1b − 11b ) [M = Y, La−Er except Ce and Pm; Pc = phthalocyaninate; TClPP = tetrakis(4‐chlorophenyl)porphyrinate] have been prepared by treating the half‐s…
Nature's use of proteins to direct and control the synthesis of inorganic solids represents an important paradigm for bioinspired materials synthesis. However, the mechanism by which polypeptides direct inorganic synthesis, particularly with regard to selective formation of crystals polymorphs, remains unknown. An imp…
Abstract Magnetic susceptibility and high‐frequency EPR spectroscopy investigations were carried out on the isostructural family of tricopper( II )‐substituted, sandwich‐type polyoxotungstates [Cu 3 (H 2 O) 3 (α‐AsW 9 O 33 ) 2 ] 12− ( 1 ), [Cu 3 (H 2 O) 3 (α‐SbW 9 O 33 ) 2 ] 12− ( 2 ), [Cu 3 (H 2 O) 3 (α‐SeW 9 O 33 )…
Abstract Adducts of the type Ln(NTA) 3 ·L [Ln = Eu, Gd; NTA = 1‐(2‐naphthoyl)‐3,3,3‐trifluoroacetonate; L = 1,4‐diaza‐1,3‐butadiene RN=CHCH=NR (R = p ‐tolyl, o ‐tolyl)] were prepared by treatment of Ln(NTA) 3 ·2H 2 O with one equivalent of the chelating N−N ligand. The mixed ligand complexes were characterised by elem…
Abstract PVC/Na + –montmorillonite (MMT) nanocomposites were prepared via a simple technique of emulsion polymerization at several different MMT clay concentrations. X‐ray diffraction and transmission electron microscopy studies revealed the formation of a mixture of intercalated and exfoliated nanostructure. Tensile…
Abstract Nanocomposites with unique material properties have been prepared from synthetic plastics and nanosilicates (nanoclay) until now, but not from biopolymers such as starch. The primary challenge in making biopolymeric nanocomposites is to achieve strong adhesion between nanoclay and polymer matrix. For the firs…
Abstract A novel water‐soluble, conducting polypyrrole was synthesized by horseradish peroxidase (HRP), in the presence of sulfonated polystyrene, as a polyanionic template. The HRP is an effective catalyst for the oxidative polymerization of pyrrole in the presence of hydrogen peroxide at room temperature. The reacti…
Gold nanoparticles protected with thiophene-terminated alkanethiols having different alkane chain lengths have been synthesized, and vapor-sensing properties of their spin-coated films have been investigated. Transmission electron microscopy and measurement of the sulfur and gold peak areas of the films by X-ray photo…
The surfactant-encapsulated europium-substituted heteropolyoxotungstates (Eu-POMs), (DODA) 10 H[Eu(H 2 O)(PW 11 O 39 ) 2 ]·17H 2 O (SEC-2, DODA: dimethyl dioctadecylammonium), (DODA) 12 H 3 [Eu(BW 11 O 39 ) 2 ]·13H 2 O (SEC-3), and (DODA) 9 [EuW 10 O 36 ]·9H 2 O (SEC-4), are structurally characterized in detail and th…
With glycine or L-alanine as ligands, a series of novel 3d-4f heterometallic Ln(6)Cu(24) clusters with the formulas of [Sm(6)Cu(24)(mu(3)-OH)(30)(Gly)(12)(Ac)(12)(ClO(4))(H(2)O)(16)].(ClO(4))(9).(OH)(2).(H(2)O)(31) (1) and [Ln(6)Cu(24)(mu(3)-OH)(30)(Ala)(12)(Ac)(6)(ClO(4))(H(2)O)(12)].(ClO(4))(10).(OH)(7).(H(2)O)(34)…
The near-IR absorption spectrum of semiconducting single-walled carbon nanotubes is characterized by the transitions associated with the first (S11) and second (S22) pairs of van Hove singularities in the electronic density of states. We report that a significant effect on the transitions can be caused by non-covalent…
Sn doped ZnO (SZO) nanowires were fabricated by a vapour–liquid–solid growth process. The reaction temperature for the formation of the nanowires can be reduced to ~100°C due to Sn doping. The growth direction and morphology of SZO nanowires depend on the amount of Sn, which is attributed to the difference in sizes be…
Polymer chains are grafted from silica beads (colloidal sol in dimethylacetamide) by atom transfer radical polymerization (ATRP). The method consists of grafting first the initiator molecules on the silica surface (“grafting from” method), in two steps. First, thiol-functionalization of the surface was achieved via si…
Sterically stabilized polystyrene latexes (previously described by Amalvy, J. I.; et al. Chem. Commun. 2003, 1826) were evaluated as pH-responsive particulate emulsifiers for the preparation of both oil-in-water and water-in-oil emulsions. The steric stabilizer was a well-defined AB diblock copolymer where A is poly(2…
The defect-free ${\mathrm{V}}_{2}{\mathrm{O}}_{5}(001)$ surface and ordered structures involving oxygen vacancies have been studied for a wide range of defect concentrations, $\ensuremath{\Theta}$ ($1∕6\ensuremath{\leqslant}\ensuremath{\Theta}\ensuremath{\leqslant}1$ monolayer, $\mathrm{ML}$), combining density functi…
We demonstrate the production of integrated-gate nanocathodes which have a single carbon nanotube or silicon nanowire/whisker per gate aperture. The fabrication is based on a technologically scalable, self-alignment process in which a single lithographic step is used to define the gate, insulator, and emitter. The nan…
A competition between a ferromagnetic metallic phase and a charge/orbital-ordered insulating one has been investigated for manganese oxides with perovskite structure, ${\mathrm{RE}}_{1\ensuremath{-}x}{\mathrm{AE}}_{x}{\mathrm{MnO}}_{3}\phantom{\rule{0.3em}{0ex}}(x=0.45)$ with $\mathrm{RE}$ and $\mathrm{AE}$ being rare…