Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We study the effect of confinement on diffusion-limited bimolecular reactions within a lattice model where a small number of reactants diffuse among a much larger number of inert particles. When the number of inert particles is held constant, the rate of the reaction is slow for small reaction volumes due to limited m…
Abstract A tubular array of TiO 2 nanotubes on Ti matrix was used as a support for Ag or Cu sputter‐deposited layers intended for surface‐enhanced Raman scattering (SERS) investigations. The composite samples of Ag/TiO 2 –nanotube/Ti and Cu/TiO 2 –nanotube/Ti were studied with the aid of scanning electron microscopy (…
β‐SiAlON–cubic boron nitride (cBN) composites were prepared from β‐SiAlON and cBN powders at 1600°–1900°C under a pressure of 100 MPa by spark plasma sintering. The effects of cBN content and sintering temperature on densification and phase transformation of the β‐SiAlON–cBN composites were studied. When 10–30 vol% cB…
In this paper, novel multiaction antibacterial nanofibrous membranes containing apatite, Ag, AgBr and TiO2 as four active components were fabricated by an electrospinning technique. In this antibacterial membrane, each component serves a different function: the hydroxyapatite acts as the adsorption material for captur…
We present a two-fold study designed to elucidate the adhesion mechanism of human U937 monocytes on novel N-rich thin films deposited by plasma- and VUV photo-polymerisation, so-called "PVP:N" materials. It is shown that there exist sharply-defined ("critical") surface-chemical conditions that are necessary to induce…
Anode‐supported solid oxide fuel cells have been produced by water base sequential tape casting and cosintering. The curvature developed upon cosintering was monitored in situ . By tailoring the green microstructure, it was possible to reduce the curvature rate and to produce flat cells avoiding the need for a creep‐f…
We have measured the influence of mesoporous silica (MCM-41 and SBA-15) nanoparticles and dense silica nanoparticles on epinephrine oxidation, a pH-dependent reaction, whose rate is small in acidic or neutral solutions but much greater at higher pH. The reaction was measured by monitoring adrenochrome at 480 nm, the p…
We measured phonon dispersions of CaFe2As2 using inelastic neutron scattering and compared our results to predictions of density functional theory in the local density approximation. The calculation gives correct frequencies of most phonons if the experimental crystal structure is used, except observed linewidths/freq…
Let's twist again! Remarkable broad and twisted ribbons were generated from the self-assembly of oligo(p- phenylene ethylene) (OPE) bearing dimeric deoxycholic acid pendant groups (see graphic). Varying the bile acid led to nanostructures with drastically different morphologies. The distinctive aggregate shapes of the…
Tea time! Gold nanoparticles (GNPs) could be readily prepared by a general strategy involving the reduction of aqueous HAuCl(4) in the presence of traditional Chinese medicines (TCMs). Spheroidal and triangular gold nanoparticles were observed depending on the TCM used. The strategy exemplified the universal applicati…
A new adamantane bent-core liquid crystal exhibiting a metastable ferroelectric phase with large polarization is synthesized and characterized. The material shows reversible switching between a birefringent (opaque) and an optically isotropic (clear) state. In the clear state, the observed piezoelectric constant is co…
The microstructures and dielectric properties of barium strontium titanate glass–ceramics are closely related to the AlF 3 and MnO 2 additions. The grain morphology was changed by adding AlF 3 , while the dielectric loss was decreased significantly by adding MnO 2 . At the same time the breakdown strength (BDS) was im…
To prepare one electroactive and biodegradable biomaterial for biomedical application, a new synthetic strategy was developed to synthesize a novel electrically conductive biodegradable polyphosphazene polymer containing parent aniline pentamer (PAP) and glycine ethyl ester (GEE) as side chains by a nucleophilic subst…
This paper presents our study on the atomic, electronic, magnetic structures, and phonon modes of the low-temperature orthorhombic phase of undoped ${\text{BaFe}}_{2}{\text{As}}_{2}$ crystal. The electronic structure is characterized by a sharp $\text{Fe-}3d$ peak close to the Fermi level and is dominated by $\text{Fe…
Abstract Hydrogen storage : A family of Ti‐substituted boranes (see figure) having optimum electronic structures and the ability to absorb hydrogen has been designed computationally. Substantial binding energies and gravimetric densities of hydrogen storage show their potential as hydrogen storage materials. The compu…
The miscibility of poly( d l -lactide) and poly(ε-caprolactone) (PDLLA/PCL) blends in a wide composition range was studied by the thermally stimulated depolarization currents technique by following the local and segmental dielectric relaxations changes as the blend composition is varied. The PCL primary relaxation is…
Abstract The relative stability of high‐spin and low‐spin states has been studied in a series of Fe(II) complexes with model ligands of different σ donation strength. The natural (delocalized) orbitals are transformed to atomic‐like orbitals to analyze the multiconfigurational wave function in a valence bond picture.…
Much is known about the photoluminescence of lanthanide-containing systems, particularly amorphous silicates or organic-inorganic hybrids and crystalline metal-organic frameworks. Comparatively, stoichiometric microporous Ln-silicates are poorly studied. Here, we report the exceptional photoluminescence of microporous…
SUMMARY A high efficiency transformation system was established for the pennate diatom Phaeodactylum tricornutum Bohlin using a plasmid containing fucoxanthin chlorophyll a/c binding protein ( fcp ) promoter/terminator and nitrate reductase ( NR ) promoter/terminator that are derived from the pennate diatom Cylindroth…
The interactions between dendrimers and surfactants led to the formation of aggregates dispersed in aqueous solutions. The potential of the resulting dendrimer-surfactant aggregates as new drug formulations was evaluated. The size, morphology, and stability of the aggregates and the localization of drugs in them were…