Materials Literature
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A new non-centrosymmetric polyborate, Li5Rb2B7O14, has been synthesized. The structure of the title compound was solved by single-crystal X-ray diffraction analysis. The infinite three-dimensional structure of Li5Rb2B7O14 is constructed from bridged LiOn (n = 4, 5, 6) and RbO10 polyhedra with two kinds of one-dimensio…
Porous silica was synthesized via the sol-gel process using clay obtained locally from Ijero-Ekiti in Ekiti State, Nigeria and compared with silica synthesized under similar conditions from sodium metasilicate (Na 2 SiO 3 ) obtained comercially. The clay was initially refluxed with sodium hydroxide (NaOH) for 2 hours…
极其细小的 Y (哦) 3 nanoparticles 成功地被扔从一没有添加剂在 0.5 mA/cm2 的当前的密度和 10 牯慭据 ? 景挠牯潲楳湯漠 ? 慌敆 ? 的洗澡温度的钢阴极上的 0.005 mol/L YCl3 低温度的洗澡 ? 楓 ??污潬 y ?? 澠？？
The optical properties of single zinc oxide (ZnO) nanolasers are investigated. ZnO nanowires with different diameters and lengths are prepared by chemical vapor transport. The diameter plays an important role in the stimulated emission process in nanowires. The spectral shift and spacing of Fabry-Pérot-type modes impl…
Using carbon monoxide as a probe molecule for the oxidation state of Cu ions, we demonstrated that anchored polynuclear charge-transfer complexes consisting of Ce(III) ions and Cu(II)-substituted Keggin-type polyoxotungstates function as efficient visible-light-driven multielectron-transfer catalysts.
We describe the synthetic preparation of well-defined symmetric multifaceted prismatic silver nanoparticles with chemically controlled faceting advantageous for strong and tunable surface-enhanced Raman scattering, SERS. These silver nanoparticles, that have been termed nanoflowers, AgNFls for their characteristic mor…
Among natural metalloenzymes, the facial two-histidines one-carboxylate binding motif (FTM) is a widely represented first coordination sphere motif present in the active site of a variety of metalloenzymes. A PDB search revealed a total of 1685 structures bearing such FTMs bound to a metal. Sixty statistically represe…
The active sites for CO dissociation were probed on mass-selected Ru nanoparticles on a HOPG support by temperature programmed desorption spectroscopy using isotopically labelled CO. Combined with transmission electron microscopy we gain insight on how the size and morphology of the nanoparticles affect the CO dissoci…
A series of biodegradable poly(ether urethane)s that responded to changes in temperature and redox potential was synthesized via a facile one-pot method. The amphiphilic poly(ether urethane)s were comprised of 2,2′-dithiodiethanol, hydrophobic hexamethylene diisocyanate and hydrophilic poly(ethylene glycol) (PEG) segm…
The exploration of transparent electron and proton transport polymer membranes can lead to novel technological advances. We demonstrate the development of highly transparent proton and electron conducting polymer composites of poly(3,4-ethylenedioxythiophene)/sulfonated poly(2,6-dimethyl 1,4-phenylene oxide) (PEDOT:sP…
The controlled preparation of organic nanotubesviaself-assembly of polycyclic aromatics is a contemporary challenge for supramolecular science. Here, we show that the self-assembly of pyrene-containing cationic amphiphiles, 3-(4-(pyren-6-yl)phenoxy)propan-1-ammonium salts (PyPA-Cl, PyPA-Br, and PyPA-SO44), can form hi…
Density functional theory (DFT) was employed to study the water dissociation and water-gas shift (WGS) reaction on a series of inverse model catalysts, M(3)O(3x)/Cu(111) (M = Mg, Ti, Zr, Mo, W; x = 1, 2, 3). It has been found that the WGS reaction on Cu can be facilitated by introducing various oxides to lower the bar…
Three new six-branched chromophores with different isolation groups were designed and synthesized by incorporating azo chromophores onto phenyl glycerol ester via an esterification reaction. The chemical structures were confirmed by 1H NMR, 13C NMR, FT-IR spectroscopy, mass spectrometry, element analysis and UV-visibl…
A change in the relative proportions of a mixture of rubber tire dust and rice husks will cause a change in the mixture's electrical permittivity and its ability to absorb electromagnetic energy.An openended coaxial probe was used in conjunction with three dielectric mixture equations (the Kraszewski equation, the Lan…
The direct synthesis of hydrogen peroxide has been studied using a highly active AuPd/C catalyst, where the activated carbon support has been pretreated with dilute HNO3 prior to metal deposition and consequently using standard reaction conditions this catalyst does not hydrogenate H2O2. The effect of reaction variabl…
The effects of heat treatment on the microstructure, tensile property and fracture behavior of as-extruded AZ91 magnesium alloy were studied with OM and SEM. The results show that the grains of as-cast AZ91 alloy are refined by hot extrusion due to dynamic recrystallization, and the mechanical properties are improved…
Electrical transport properties such as conductivity (σ) and thermo electric power (S) of Cadmium substituted Nickel Ferrites, forming chemical formula Ni1–xCdxFe2O4, where x = 0.0, 0.2, 0.4 have been investigated from room temperature to well beyond the Curie temperature. Plots of log (σT) versus 103/T are linear and…
The foot epithelium of the gastropod Haliotis tuberculata is studied by light and electron microscopy in order to contribute to the understanding of the anatomy and functional morphology of the mollusks integument. Study of the external surface by scanning electron microscopy reveals that the side foot epithelium is c…
Carbon has been widely used as a catalyst support and adsorbent in industry. However, it suffers from poor stability due to its limited mechanical strength, particularly under high pressures and temperatures. We report here a carbide derived carbon (CDC) layer on a porous SiC surface, which has the properties of high…
The solubility of ca. 5.0 nm gold nanoparticles was studied systematically as a function of ligand shell and solvent. The ligands were octane-, decane-, dodecane- and hexadecanethiols; the solvents were the n-alkanes from hexane to hexadecane and toluene. Supernatant concentrations in equilibrium with precipitated sup…