Materials Literature
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Abstract Biodegradable composites consisting of aliphatic polyesters (poly[(butylenes succinate)‐co‐(butylenes adipate)] (PBSA)) and Bombyx mori silk fibers coated with carbon nanotubes (CNTs) were prepared by melt compression molding. The mechanical properties of PBSA were enhanced by the incorporation of a small amo…
Abstract One hundred nm wide by four μm long poly(methyl pyrrole) (PMPy) nanowires without and with biomolecule, biotin‐quantum dot, were synthesized by electrochemical polymerization of 1‐methyl pyrrole with chloride and p ‐toluene sulfonate dopants in nanochannels between microfabricated gold electrodes. Scanning el…
The paper presents results of a detail study of polarized multiple-order Raman spectra of several, isostructural to $\mathrm{La}\mathrm{Mn}{\mathrm{O}}_{3}$, $R\mathrm{Mn}{\mathrm{O}}_{3}$ compounds $(R=\mathrm{Pr},\mathrm{Eu},\mathrm{Dy},\mathrm{Ho},\mathrm{Y})$ and oxygen isotope substitution effects. A comparison o…
Grain‐boundary films 0.6 nm in size have been observed on the grain boundaries of neodymia (Nd 2 O 3 )‐doped alumina (α‐Al 2 O 3 ) sintered at 1800°C. Direct observation by high‐angle annular dark‐field imaging in the aberration‐corrected scanning transmission electron microscope shows that this type of grain‐boundary…
Scanning tunneling microscopy (STM) has been used to investigate the nucleation and growth of Ag islands on the fivefold surface of an icosahedral Al-Pd-Mn quasicrystal. Analysis of the data as a function of deposition temperature, from $127\phantom{\rule{0.3em}{0ex}}\mathrm{K}\phantom{\rule{0.3em}{0ex}}\text{to}\phan…
Well‐dispersed barium titanate (BaTiO 3 ; BT) with an average primary particle size <200 nm and lattice tetragonality 1.010, being very close to that of a BT single crystal, was obtained via a solid‐state route with the aid of preliminary dry mechanical processing. The latter treatment not only activates the starti…
We present periodic density functional theory (DFT) calculations combined with thermodynamic analysis to study the structure of isolated molybdenum oxide entities supported on titania (anatase) under ambient and dehydrated conditions. The TiO 2 support is represented by the perfect and hydrated (101) and (001) surface…
Soft‐chemistry routes were used to synthesize Ce 0.9 Gd 0.1 O 1.95 ‐based powders with attractive and stable structural, morphological, and textural properties. In the intermediate temperature range between 500° and 700°C, the average Gd‐doped CeO 2 (CGO) crystallite size is in the range 9–22 nm and the specific surfa…
We demonstrate a general approach to characterize compositional heterogeneity in polymer thin films using Fourier transform infrared (FTIR) spectroscopy. Polymer films with varying degrees of heterogeneity were prepared using a model chemically amplified photoresist where a photoacid catalyzed reaction-diffusion proce…
The magnetic state in 6H-type BaFeO3−δ at low temperature was studied using small-angle neutron scattering, positive-muon spin relaxation and magnetization measurements. These experiments demonstrate the appearance of two different types of magnetic states: an antiferromagnetic ordering with a long-range correlation a…
We study experimentally and theoretically the sedimentation of gels made of strongly aggregated colloidal particles, focusing on the long-time behaviour, when mechanical equilibrium is asymptotically reached. The asymptotic gel height is found to vary linearly with the initial height, a finding in stark contrast with…
Magnetic nanoparticles have emerged as an important class of functional nanostructures with potential applications of magnetic resonance imaging, drug targeting, and bio‐conjugation. We have developed a modified sol–gel approach to synthesize stable and well‐dispersed magnetic Co@SiO 2 nanoparticles with improved cont…
Results of the simultaneous in-situ UV-vis and open-circuit potential (OCP) monitoring of the low-concentrated aniline (An) polymerization in the presence of camphorsulfonic acid (CSA) suggested that during the induction period (IP) step a transition state formed, which probably included anilinium cation and the oxida…
Nickel oxide (NiO) was screen printed onto the surfaces of 3 and 8 mol% yttria‐stabilized zirconia (YSZ) dense pre‐fired substrates and then heat treated at temperatures from 1350° to 1550°C. The effect of NiO was dependent on the yttria content of the substrate. In 3 mol% YSZ, it was found to alter the phase composit…
Abstract CdS nanoparticles functionalized by electroactive oligothiophenes, with narrow size distribution, have been prepared and characterized. The structure of the hybrid product was investigated by TEM, XRD, optical and FTIR spectroscopy. The modified nanoparticles consist of a few tens of oligothiophene units atta…
Short-term tests showing the influence sulfur has on solid oxide fuel cell (SOFC) performance have been performed. The experiments were performed using two single-cell SOFC setups operated at 800 °C. In setup I, sulfur (H 2 S) was mixed into the fuel gas in concentrations ranging from 20 to 100 ppm. It was found that…
Several algorithms are available to reconstruct low-resolution electron density maps of biological macromolecules from small-angle solution scattering data. These algorithms have been extensively applied to proteins and protein complexes. Here, we demonstrate their applicability to nucleic acids by reconstructing a se…
Single crystals of Al 2 O 3 were reproducibly grown from an MgO‐doped polycrystalline precursor. The single crystals were grown through controlled abnormal grain growth at temperatures between 1670° and 1945°C. It was observed that CaO impurities segregated to the boundary between the single crystal and the polycrysta…
We demonstrate dramatic modifications to the electronic structure in single-walled carbon nanotubes due to band gap renormalization, the many-body induced shrinkage of the fundamental band gap. This is examined within the framework of ideal $p\text{\ensuremath{-}}n$ diodes formed along individual single-walled carbon…
Abstract This mini review uses two examples to illustrate the importance of supramolecular chemistry in natural and biomimetic polymers for advanced mechanical properties. In the first example, dragline silk, one of the strongest and toughest natural fibers, uses intermolecular weak forces to self‐assemble into nanoco…