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。
The coadsorption of alkalis with CO and O on Cu(111) and Ni(111) was studied by vibrational measurements. Unexpectedly, we found an enhanced alkali oxidation rate for alkali + CO compared with alkali + O. Such finding was ascribed to the short-range alkali−CO interaction which lowers the barrier for CO dissociation an…
BiFeO3 (BFO) films with and without a Bi3.5Nd0.5Ti3O12 (BNT) buffer layer were fabricated on indium tin oxide (ITO)/Si substrates using a metal organic decomposition process. X-ray diffraction measurements reveal that a BNT buffer layer can favour the growth of (1 1 0)-oriented grains in the BFO film. BFO film with a…
Stoichiometric Er silicate thin films, monosilicate (Er 2 SiO 5 ) and disilicate (Er 2 Si 2 O 7 ), have been grown on c-Si substrates by rf magnetron sputtering. The influence of annealing temperature in the range 1000–1200 °C in oxidizing ambient (O 2 ) on the structural and optical properties has been studied. In sp…
A new M3L2 homodimeric subphthalocyanine cage was self-assembled and characterised. Among the six possible diastereoisomeric metallosupramolecular capsules attainable, only one was shown to form under thermodynamic conditions. These results obtained on the basis of mass spectrometry, nuclear magnetic resonance and mol…
The current paper reports the results of a study of the simultaneous decomposition of NH 3 and toluene on sulfur tolerant nonconventional tungsten-based catalysts [tungsten carbide (WC) and tungstated zirconia (WZ)] at temperatures <750 °C in the presence of H 2, CO, CO 2, and H 2 O, such as it would be present in hot…
Far-infrared magneto-transmission spectroscopy has been used to probe 'relativistic' fermions in highly oriented pyrolytic and natural graphite. Nearly identical transmission spectra of those two materials are obtained, giving the signature of Dirac fermions via absorption lines with an energy that scales as . The Fer…
In this communication, the basic strategies to control the kinetics and transport phenomena of the crystal growth process, as well as novel methods to induce either nucleation or protein crystal growth via electrochemical processes, are reviewed. Additionally, recent advances, where low direct/alternant current or vol…
Abstract The dislocation structures induced by low‐plastic‐strain‐amplitude cyclic deformation of [111] multiple‐slip‐oriented Cu single crystals were investigated using electron channelling contrast (ECC) technique in scanning electron microscopy (SEM). At a low plastic strain amplitude γ pl of 8.8 × 10 –5 , the satu…
We show that, when subjected to microwave fields, surfactant-stabilized single-walled carbon nanotubes (SWNTs) develop polarization potentials at their extremities that readily drive electrochemical reactions. In the presence of transition metal salts with high oxidation potential (e.g., FeCl3), SWNTs drive reductive…
We report on the high-temperature resolution measurements of the optical and thermal parameters of a liquid-crystal-silica nanoparticle colloid, as well as its video inspection, simultaneously performed in an upgraded photopyroelectric calorimeter. Over the nematic-isotropic coexistence region, the determined nematic…
Solvation dynamics in alcohols confined in silica nanochannels was examined by time-resolved fluorescence spectroscopy using coumarin 153 (C153) as a fluorescent probe. Surfactant-templated mesoporous silica was fabricated inside the pores of an anodic alumina membrane. The surfactant was removed by calcination to giv…
Abstract The refractive indices of 0.9Pb(Zn 1/3 Nb 2/3 )O 3 ‐0.1PbTiO 3 single crystal at different wavelengths have been measured by the minimum deviation method at room temperature, and their dispersion equations are obtained. The parameters connected to the energy band structure are obtained by fitting single‐oscil…
Catching the worm: Long myelin-like tubules of a polyethylene oxide-polybutylene oxide block copolymer are kinetically unstable but can be trapped by silica incorporation to produce hybrid nanostructures with high shape anisotropy (see TEM image). Sequestration of mixtures of organosilanes and metal alkoxides or drug…
Abstract Sodium bicarbonate is a substance which is produced in the middle stages of the soda ash production process. In this precipitation process, carbon dioxide gas is continuously injected into the bubble column reactor which contains carbonate and bicarbonate solutions. To elucidate the key parameters affecting p…
The use of the anion of 2,2-bis(hydroxymethyl)-2,2,2-nitrilotriethanol (bis-tris or LH5) as a chelate in Mn cluster chemistry is reported, and two products [Mn(N3)(LH3)] ( 1) and [Mn5(LH2)3(LH5)(MeOH)2.5]Cl4 ( 2) are described. The reaction of Mn(ClO4)2 x 6H2O and NaN3 with LH5 and NEt3 in a 1:1:1:2 molar ratio in DMF…
The magnetic Barkhausen emission (MBE) technique is considered as a potential non-destructive evaluation (NDE) method for assessing material properties in case-hardened gears. For gear manufacturing industries, the evaluation of material properties such as tempering induced changes in hardness level and the associated…
Multi-wavelength lasing in a dye-doped cholesteric liquid crystal (CLC) cell is demonstrated. By adding oversaturated chiral dopant, the multi-photonic band CLC structure can be obtained with non-uniform chiral solubility. Under appropriate excitation, multi-wavelength lasing can be achieved with a multi-photonic band…
Recently, the carbon dioxide (CO 2 ) process with sphere forming block copolymer (bcp) templates successfully introduced nanometer cells into polymeric materials. CO 2 selectively swells CO 2 -philic domains of fluorinated blocks and introduces nanometer voids in the CO 2 -philic domains. We extended the same methodol…
We study a two-dimensional Hubbard-Holstein model with phonons treated in the adiabatic limit. A Hartree-Fock decomposition is employed for the Hubbard term. A range of electronic densities are discussed with special emphasis on the quarter filling $(n=0.5)$. We argue that the quarter-filled system is relevant for the…
We report plane-polarized Raman-scattering spectra of iron oxypnictide superconductor ${\text{NdFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ single crystals with varying fluorine $x$ content. The spectra exhibit sharp and symmetrical phonon lines with a weak dependence on fluorine doping $x$. The temperature dependence d…