Orientation-controlled assembly and solvothermal ion-exchange of layered double hydroxide nanocrystals
The orientation-controlled LDH crystals on Si substrates were intercalated by dicarboxylate ions to give the anisotropic layer expansion.
Materials Literature
文献浏览
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。
Effects of UVB radiation and salt stress on growth, pigments and antioxidative defence of the marine diatom Cylindrotheca closterium
During emersion, diatoms are exposed to sunlight (with UVB) on tidal flats, where the salinity may increase as a result of evaporation. In order to investigate whether a combination of UV radiation and desiccation would cause oxidative stress under such conditions, an experiment has been carried out with the diatom Cy…
Large magnetocaloric effects in NaZn13-type La(FexSi1−x)13compounds and their hydrides composed of icosahedral clusters
The magnetocaloric effects (MCEs) in cubic NaZn13-type La(FexSi1−x)13 compounds and their hydrides composed of icosahedral clusters have been investigated because these compounds exhibit the itinerant-electron metamagnetic (IEM) transition just above the Curie temperature Tc: The value of Tc can be increased continuou…
Trapping Mechanism Associated with Electron Delocalization and Tunneling of CaAl[sub 2]O[sub 4]:Ce[sup 3+], A Persistent Phosphor
A long afterglow phosphor, was prepared and studied. It exhibits a broad-band emission in the deep blue with a persistence time longer than 10 h. The ions occupy three distinct sites in this material, and the emission and excitation spectra from ions in these sites have been identified. The thermoluminescence spectra…
Studies on nerve cell affinity of biodegradable modified chitosan films
Chitosan, a natural polysaccharide that has excellent biocompatibility and biodegradability, can be used as nerve conduit material. The purpose of this work was to study the ability of chitosan and some chitosan-derived materials to facilitate nerve cell attachment, differentiation and growth. The biomaterials studied…
Quantum dot-labelled polymer beads by suspension polymerisation
CdSe quantum dots with polymerisable ligands have been incorporated into polystyrene beads, via a suspension polymerisation reaction, as a first step towards the optical encoding of solid supports for application in solid phase organic chemistry.
Effect of Temperature on Hydrogen Environment Embrittlement of Type 316 Series Austenitic Stainless Seels at Low Temperatures
Hydrogen environment embrittlement (HEE) of type 316 series austenitic stainless steels was investigated in the temperature range from 300 to 80 K. Hydrogen showed a marked effect on the tensile properties of type 316, 316L and 316LN stainless steels. HEE increased with decreasing temperature, reached a maximum at aro…
Alkyl chains acting as entropy reservoir in liquid crystalline materials
The roles played by the conformational disordering of alkyl chains in determining the aggregation states of matter are reviewed for liquid crystalline materials from a thermodynamic perspective. Entropy, which is one of the most macroscopic concepts but which has a clear microscopic meaning, provides crucial microscop…
Water vapor effects on the cyclic oxidation resistance of alumina forming alloys
Water vapor is present in most environments in which alloys are used at elevated temperatures and there are papers in the literature that show water vapor usually has adverse effects on the oxidation resistance of alloys. However, the exact effect of water vapor is dependent on the particular alloy under consideration…
A one-step synthesis of cadmium selenide quantum dots from a novel single source precursor
A new approach to the one-step synthesis of cadmium selenide (CdSe) quantum dots is reported using the air stable complex cadmium imino-bis(diisopropylphosphine selenide); the ligand is readily prepared from elemental selenium and the precursor, quantum dots of comparable quality to those prepared by conventional meth…
Synthesis, aggregation behavior and nonlinear absorption properties of lead phthalocyanines substituted with siloxane chains
The synthesis and characterization of polysiloxane substituted metal-free and lead phthalocyanines are described. These materials form a class of isotropic liquid phthalocyanines that combine a large nonlinear absorption with an exceptionally large nonlinear thermal refractive effect. These materials effectively coupl…
Thermal Behavior of Zein‐based Biodegradable Films
Abstract In previous work, zein was plasticized with oleic acid to obtain flexible films. However, it was observed that film properties were affected by the preparation method employed. Our objective was to investigate the effect of processing methods on thermal behavior of zein films by differential scanning calorime…
Fluorescent chromophore functionalized single-wall carbon nanotubes with minimal alteration to their characteristic one-dimensional electronic states
Soluble, chromophore-functionalized SWNTs (SWNT-NA) have been synthesized via covalent bonding with minimal alteration to the characteristic one-dimensional electronic states of SWNTs. The key step in the molecular design includes incorporating a naphthalimide fluorescent moiety onto SWNTs via the amidation of oxidati…
A Comparison of Cu-Ceria-SDC and Au-Ceria-SDC Composites for SOFC Anodes
Solid oxide fuel cells (SOFC) with samaria-doped ceria (SDC) electrolytes were prepared with anodes made from either Cu, ceria, and SDC or Au, ceria, and SDC. These cells were tested in H 2 and n -butane fuels at 650°C. The similarity of performance ( V I ) curves and impedance results for cells made with Au and Cu…
One-pot synthesis of phenyl- and amine-functionalized silica fibers through the use of anthracenic and phenazinic organogelators
In a typical one-pot synthesis procedure, hybrid organosilica fibers were grown by templating the co-condensation between TEOS and selected organotrialkoxysilanes (20 mol% of phenyltriethoxysilane, PTES, or aminopropyltriethoxysilane, APTES) through the use of DDOA (2,3-bis(n-decyloxy)anthracene) and DUOP (2,3-bis(n-u…
Chemical properties of polyamines with relevance to the biomineralization of silica
Polyamines mimicking substances which occur naturally in biosilicas have been synthesized and show an accelerating effect on silica condensation, which depends on the chemical nature, the architecture (linear or branched), and the degree of polymerization.
Two methods for amplifying the optical nonlinearity of a conjugated porphyrin polymer: transmetallation and self-assembly
A new soluble conjugated metalloporphyrin polymer has been synthesised as its complex with zinc(II), lead(II) and copper(II) and as the free-base. The zinc complex aggregates in non-coordinating solvents, due to coordination of the amide side-chains to the zinc centres. These aggregates dissociate on addition of pyrid…
Photocatalytic properties of layered perovskite tantalates, MLnTa2O7 (M = Cs, Rb, Na, and H; Ln = La, Pr, Nd, and Sm)
Layered lanthanide tantalates and their ion-exchanged phases (MLnTa2O7, M = Cs, Rb, Na, and H; Ln = La, Pr, Nd, and Sm) were prepared to evaluate their photocatalytic activity for water splitting under UV irradiation. The optical band gap energy was dependent on the lanthanide, Ln, but negligibly affected by the monov…
A Novel Processing Route to Develop a Dense Nanocrystalline Alumina Matrix (<100 nm) Nanocomposite Material
A dense 3‐mol%‐yttria‐stabilized tetragonal zirconia polycrystalline (3Y‐TZP) toughening alumina matrix nanocomposite with a nanocrystalline (<100 nm) matrix grain size has been successfully developed by a novel processing method. A combination of very rapid sintering at a heating rate of 500°C/min and at a sinteri…
Strong tendency towards homeotropic alignment in a hexagonal columnar mesophase of fluoroalkylated triphenylenes
It was found that the introduction of a perfluoroalkyl group into the peripheral chains of triphenylene mesogens could provide a strong tendency towards homeotropic alignment of the hexagonal columnar (Colh) mesophase on a variety of substrates, indicating a new concept of molecular methodology for the alignment contr…