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。
Cancrinite crystals possessing parallel nanochannels are attractive for incorporation of guest materials and preparation of one-dimensional structures. In this work, we study variety of cancrinite crystals synthesized with Se inside their channels. Single crystal x-ray diffraction, polarized Raman, optical absorption,…
The hydrothermal reactions of zinc oxide, phosphoric acid, sodium orthovanadate, and the appropriate polyimine ligand at 200 °C for 95, 68, and 42.5 h, respectively, have yielded three novel compounds, [Zn(bpy)(VO2)(PO4)] (1), [Zn(terpy)(VO2)(PO4)] (2), and [Zn(o-phen)(ZnVO)(PO4)2] (3). Compounds 1 and 2 are both one-…
We have examined the structures of surfactant self-assemblies left on substrates as a contact line spontaneously retreats across the surface during an autophobing event. A continuous structural gradient is formed during the spontaneous retreat: from molecules lying down on the surface with low packing densities in a r…
Anion ligands-preserved cationic giant Pd clusters were prepared by treatment of palladium carbonyl acetate cluster, Pd 4 (CO) 4 (OAc) 4 ·2AcOH (PCA), with metal nitrates, e.g. Cu(NO 3 ) 2, and Fe(NO 3 ) 3, in the presence of 1,10-phenanthroline (phen). Extensive characterization of the Pd clusters was made by XRD, XP…
Gold nanoparticle I and nanoparticle II protected by 10-(1-pyrenyl)-6-oxo-decanethiol and 17-(1-pyrenyl)-13-oxo-heptadecanethiol, respectively, were prepared and characterized by 1 H NMR, FT-IR, XPS, UV−vis and fluorescence spectroscopies and TEM and elemental analysis. Their compositions were determined to be (C 25 H…
Mesoporous organised aluminium oxide based thin films have been prepared by combining the dip-coating method, the sol–gel chemistry and the template approach. The oxide network is composed of aligned-with-the-surface cylindrical pores compacted in the 2D-hexagonal p6m space group. AlCl3 has been chosen as precursor an…
The ability to control the structure of monolayers on radial and faceted surfaces is an important goal for the successful application of nanoparticles in devices and materials. To investigate the effect of steric bulk in the monolayer periphery on monolayer protected gold cluster (MPC) properties, we have synthesized…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTOptical Properties of Small Clusters of Silver and Gold AtomsRobert H. DoremusView Author Information Materials Science and Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180 Cite this: Langmuir 2002, 18, 6, 2436–2437Publication Date (Web):February 8…
Electrostatically self-assembled (ESA) polyelectrolyte films show in general no internal structure. The use of special polycations, however, namely of lyotropic ionenes, may give rise to highly ordered coatings. In this article, the influence of the charge density of the polyanion, as well as the distribution of the c…
Abstract: A new occurrence of natrite,g-Na 2 (CO 3 ), was discovered as monominerallenses (more than 20cm in size) in pegmatites of Mt. Koashva, Khibiny alkalinemassif, Kola peninsula, Russia. Electron microprobe, XRD, IR and optical data fornatrite of this new occurrence are given. A single-crystal fragment isolated…
The enthalpy of oxidation/reduction of the grossly non-stoichiometric high-temperature phase SrFeO3−δ, i.e. the enthalpy ofSrFeO2.50 (perovskite) + ⅙O2(g) ⇌ SrFeO2.8333 (perovskite)has been deduced from calorimetric data. The enthalpy of oxidation of vacancy ordered brownmillerite-type SrFeO2.50 obtained by direct rea…
The collapse of Lennard-Jones homopolymers is investigated by means of Monte Carlo simulations and the inherent structure/superposition approach, with special emphasis on finite size effects. At thermal equilibrium, the polymers undergo a series of phase changes from the zero temperature folded state to a coexistence…
The hydrolytic behavior of monolayers of biodegradable [poly( l -lactide)/poly(ε-caprolactone)] ( l -PLA/PCL) blends spread at the air/water interface is studied to identify the relative rate of hydrolytic degradation of each component when exposed to a basic subphase. As the hydrolysis time increases, the isotherm re…
The effect of a floating stearate monolayer on the formation of Mg−Al-hydrotalcite (Mg−Al-LDH) has been studied. A subphase was an aqueous solution of Mg(NO 3 ) 2 ·6H 2 O (1.6 × 10 - 3 M) and Al(NO 3 ) 3 ·6H 2 O (5.3 × 10 - 4 M) adjusted at pH = 10.5 by 1.0 M NaOH. Templating effects were studied in the following two…
Crystallization is an important industrial operation due to its wide application in chemical manufacturing processes. The size of crystals is important as it impacts on downstream operations, such as filtration, and is required for process control that aims at producing a product with a desired size. Knowledge of the…
General effective transport coefficients and the thermoelectric figure of merit $\mathrm{ZT}$ for anisotropic systems are derived. Sizable induced transverse fields on surfaces perpendicular to the current flow are shown to reduce the effective transport coefficients. A microscopic electronic model relevant for multiv…
The interaction between cellulosic material and benzophenone was studied by molecular modeling. A model of the crystalline part of a native microfibril was built from previously published coordinates of the Iβ allomorph. This model presents three faces, namely (200), (110), and (11̄0), of about the same surface area.…
The adsorption of lysozyme in phosphate buffer (10 - 2 M + NaCl 10 - 2 M) at pH 7.4 on silica was studied at different flow rates. We measured simultaneously as a function of time (i) the streaming potential between the extremities of the capillary (internal diameter, 0.530 mm; length, 22 cm) and (ii) the amount adsor…
We have prepared MCM-41 samples having good crystallinity and possessing a small amount of surface hydroxyl groups (0.48 OH nm - 2 ) through extensive aging of a mixed solution of silica and surfactant in the temperature range from 308 to 413 K. The MCM-41 sample thus prepared exhibits excellent resistance to water, a…
A parametrization algorithm to determine chord-length distributions (CLD) from small-angle scattering data is used to characterize details of the pore structure, pore size, and morphology of porous carbon materials. This approach is applied to various carbon processing procedures, such as steam activation, tempering,…