Materials Literature
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Highly reactive and nanocrystalline powders of LaCrO 3 based compositions, having the general formula La 0.9 Ca 0.1 Cr 1− x M x O 3−δ (0≤ x ≤0.1, and M=Al, Co, or Mg), suitable for solid‐oxide fuel cell (SOFC) applications, have been synthesized using an auto‐combustion technique with ammonium dichromate as the chromi…
The behavior of most materials is influenced by inhomogeneously distributed microscale properties. A reliable and efficient use of microstructured materials in engineering, nanotechnology, biomedical application and earth sciences requires and justifies high efforts in their mathematical modeling and numerical treatme…
Lamellar platelets of triblock copolymers grown in dilute toluene solution with trace amounts of water can be used as templates for tethered diblock copolymer chain preparation and analysis. Polystyrene- b -poly(2-vinylpyridine)- b -poly(ethylene oxide) (PS- b -P2VP- b -PEO) with two different block fractions were use…
Abstract Raman scattering from double‐walled carbon nanotubes is reported with particular emphasis on the response from the radial breathing mode (RBM) of the inner‐shell tubes. The unexpected large number of very narrow lines observed is explained by the growth of one and the same inner tube type in different outer t…
Abstract Butadiene/isoprene copolymers were prepared using the catalyst system V(acac) 3 ‐MAO. The structure of the comonomers is trans ‐1,4 and the butadiene and isoprene units are statistically distributed along the polymer chain. The attitude of the butadiene sequences to crystallize in the monoclinic form and to e…
A novel approach for the preparation of SrTiO 3 :Pr, Al nanophosphors by microemulsion–microwave heating is reported in this paper. In comparison with the conventional solid‐state sintering processes, this novel method provides a limited small space in a micelle for the formation of nanosized precursors and requires a…
The effects of heat‐treatment conditions on crystallographic orientation was studied on single layer, 0.14–0.19‐μm‐thick Pb(Zr 0.53 Ti 0.47 )O 3 (PZT) films deposited on Pt(111)/TiO 2 /SiO 2 /Si(100) substrates by spin‐coating using a Pb(NO 3 ) 2 –Zr(OC 3 H 7 n ) 4 –Ti(OC 3 H 7 i ) 4 —polyvinylpyrrolidone (PVP)–CH 3 C…
The thermal conductivity of monolithic Y‐Sm/α‐SiAlON was evaluated using experimental data and finite element analysis. The thermal diffusivities of Y, Y‐Dy, and Y‐Ce/α‐SiAlON ceramics were also investigated experimentally for comparison. The maximum achievable thermal conductivity of Y‐Sm/α‐SiAlON has been calculated…
We have studied the effect of an Anderson impurity in Landau quantized graphene, with special emphasis on the influence of the chemical potential. Within the slave-boson mean-field theory, we found reentrant Kondo behavior by varying the chemical potential or gate voltage. Between Landau levels, the density of states…
The origin of ferromagnetism observed in 2 at.% 57 Fe-doped NiO samples is investigated. A precursor was produced from the co-precipitation of stoichiometric 57 Fe and Ni nitrate solutions, and the 2% 57 Fe-doped NiO samples were prepared by heating this precursor in air at temperatures between 673 and 873 K, for 1–25…
This paper reports a structure analysis of the åkermanite-gehlenite solid solution. This solution is non-ideal with a negative excess volume in the entire compositional range. X-ray diffraction shows anomalous behavior of the cell parameters close to the gehlenite end-member (åk 08 ge 92 , åk 35 ge 65 ). This behavior…
Abstract The key to developing novel applications of SWNTs in biotechnology and biomedicine is to improve their biocompatibility and solubility in water and to assemble them into useful architectures. We describe how amylose can help to solubilize SWNTs and wrap around SWNTs into helical superstructures with periodic…
A mesoscale theory for the tensor order parameter Q is used to investigate the structures that arise when spherical nanoparticles are suspended in confined nematic liquid crystals (NLCs). The NLC is "sandwiched" between a wall and a small channel. The potential of mean force is determined between particles and the bot…
The connection between isobaric fragility and the properties of high-order stationary points of the potential energy surface in different supercooled Lennard-Jones mixtures was investigated. The increase of effective activation energies upon supercooling appears to be driven by the increase of average potential energy…
We present measurements of the thermal conductivity $\ensuremath{\kappa}$ and the thermal expansion $\ensuremath{\alpha}$ of $\mathrm{Nd}\mathrm{Mn}{\mathrm{O}}_{3}$ and $\mathrm{Tb}\mathrm{Mn}{\mathrm{O}}_{3}$. In both compounds, a splitting of the $4f$ multiplet of the ${R}^{3+}$ ion causes Schottky contributions to…
A mass of codes: Lysine-rich silaffin proteins from diatoms guide silica formation by self-assembly processes. Aided by mass spectrometry, the analysis of 28 posttranslationally modified lysine residues in silaffin-3 from Thalassiosira pseudonana uncovers an amino acid sequence based code selecting the type of modific…
In this work, hollow fibers to be used as guides for tissue engineering applications were produced by dry-jet-wet spinning of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/poly(epsilon-caprolactone) (PHBHV/PCL) solutions in chloroform with various weight ratios between the components (PHBHV/PCL 100/0; 80/20; 60/40; 50/…
Nanocrystals (15−30 nm) of the magnetic chalcospinel CuCr 2 Se 4 have been synthesized using a facile solution-based method with good size control. They have close to cubic morphology with a narrow size distribution and exhibit superparamagnetic behavior at room temperature.
Spirocyclic tin dialkoxides are unique initiators for the ring-expansion polymerization of lactones leading to complex, but well-defined macromolecular architectures. In a first example, epsilon-caprolactone (epsilon CL) was polymerized, followed by the resumption of polymerization of a mixture of epsilon CL and epsil…
In this letter, we report that single-walled carbon nanotubes (SWNTs) can be dissolved in organic solvents through the formation of admixtures with barbituric acid.triaminopyrimidine (BA.TP) complexes using mechanochemical high-speed vibration milling (HSVM) and sonication methods. In contrast, neither BA nor TP alone…