Materials Literature
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
We report the synthesis of Cd-substituted ZnO nanostructures (Zn 1− x Cd x O with x up to ≈0.09) by the high-pressure solution growth method. The synthesized nanostructures comprise nanocrystals that are both particles (∼10–15 nm) and rods which grow along the [002] direction as established by transmission electron mi…
Surfactant-passivated germanium nanocrystals (Ge(0) NCs) 3-5 nm in diameter were synthesized and encapsulated with functionalized phospholipids to yield water-soluble Ge(0) NCs. Upon encapsulation, the NCs retained their cubic crystalline phase and displayed good resistance to oxidation, as determined by transmission…
The electronic structure of the interface between Tris (8-hydroxyquinolino)-aluminum (Alq3) and La0.7Sr0.3MnO3 manganite (LSMO) was investigated by means of photoelectron spectroscopy. As demonstrated recently this interface is characterized by efficient spin injection in organic spintronic devices. We detected a stro…
In this paper we show that the vortex states can be created not only in magnetically soft "small" (with the dipolar and exchange energy competition) cylindrical dots, but also in magnetically saturated "big" (when the exchange is neglected) cylindrical dots. A property associated with a vortex structure becomes eviden…
The near nucleus behavior of the exchange-correlation potential $v_{xc}({\bf r})$ in Hohenberg-Kohn-Sham density functional theory is investigated. It is shown that near the nucleus the linear term of $O(r)$ of the spherically averaged exchange-correlation potential ${\bar v}_{xc}(r)$ is nonzero, and that it arises pu…
One-dimensional (1D) MoO 2 nanorods in the form of a large-area array and nanobranched structure were prepared by hot-filament metal–oxide vapour deposition at low and high pressures in atmospheric argon flows respectively. The x-ray diffraction (XRD) patterns of both as-synthesized samples show that the 1D MoO 2 nano…
Interring twisting (change in the dihedral angle between conjugated rings) of polythiophene was studied theoretically using periodic boundary conditions (PBC) at the B3LYP/6-31G(d) level. We find that the band gap of polymers is strongly dependent on the interring twist angle; yet twisting requires very little energy.…
Ge whiz: Highly stereoselective bulk ring-opening polymerization of rac-lactide to afford a heterotactic polymer was achieved for the first time through the use of a single-site germanium alkoxide initiator. The C3 symmetry of the ligand may play an important role in controlling stereoselective chain propagation from…
Within a first principles framework, we study the electronic structure of the recently synthesized polymeric coordination compound Cu(II)-2,5-bis(pyrazol-1-yl)-1,4-dihydroxybenzene (CuCCP), which has been suggested to be a good realization of a Heisenberg spin-1/2 chain with antiferromagnetic coupling. By using a comb…
Fe-sheathed MgB2 tapes with cheap stearic acid, Mg stearate and Zn stearate doping were prepared through the in situ powder-in-tube method. It is found that Jc, Hirr, and Hc2 were significantly enhanced by doping. Compared to the pure tapes, Jc for all the doped samples was improved by more than an order of magnitude…
Two pre-treatments were studied for AZ31 Mg alloy substrates, consisting of immersion in cerium nitrate and lanthanum nitrate solutions for various immersion times. The surface composition was investigated by X-ray photoelectron spectroscopy and Auger electron spectroscopy that revealed the presence of a surface film…
Single-crystal α-MnO 2 nanorods were prepared by hydrothermal reaction of single KMnO 4 under acidic conditions. The nanorods have a diameter of 30–70 nm and a length up to 2 µm. The formation mechanism for the α-MnO 2 nanorods was investigated. Electrochemical properties of the MnO 2 nanomaterials prepared for differ…
Abstract Raman spectroscopy is one of the most extensively employed methods for the characterization of carbon nanotubes. In this review article, an overview about Raman spectroscopy as a tool for the characterization of functionalized single‐walled carbon nanotubes (SWCNTs) is given. First, the relevant Raman modes i…
In this work, single-crystalline gold nanoplates were produced by treating an aqueous solution of chloroauric acid with the extract of the unicellular green alga Chlorella vulgaris at room temperature. The results suggest proteins as the primary biomolecules involved in providing the dual function of Au(III) reduction…
A stable, high-mobility ZnO thin-film semiconductor was fabricated by thermal treatment of a solution-deposited thin film from a solution of Zn(OAc) 2 /2-ethanolamine in methoxyethanol. This ZnO thin-film semiconductor was composed of closely packed ZnO single crystals (∼30 to 50 nm) having a hexagonal structure assum…
In this paper the relationship between the classical density functional theory of freezing and phase-field modeling is examined. More specifically a connection is made between the correlation functions that enter density functional theory and the free energy functionals used in phase-field crystal modeling and standar…
Motivated by recent graphene transport experiments, we undertake a numerical study of the conductivity of disordered two-dimensional massless Dirac fermions. Our results reveal distinct differences between the cases of short-range and Coulomb randomly distributed scatterers. We speculate that this behavior is related…
Dans cet article sont presentees des etudes concernant la synthese, la structure cristalline et la decomposition thermique de trois oxalates hydrates de bismuth (III). Ces composes sont obtenus par precipitation en phase acqueuse a pH controle, a partir de solutions de nitrate de bismuth Bi(NO 3 ) 3 et d'acide oxaliqu…
Background Projectile-induced hydrodynamic ram can generate fuel-tank pressures in excess of 10,000 psi. This event is potentially catastrophic for aircraft fuel tanks designed to survive sustained pressures of little more than 50 psi. While the magnitude of ram pressure is dictated by a combination of fuel-level and…