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 effect of microwave radiation on polymer microcapsules containing inorganic nanoparticles has been studied. The samples were exposed to 2.45 and 8.208 GHz microwaves of variable power. The data of scanning electron microscopy show that the character of microwave action upon polymer microcapsules depends on their c…
Reduction of friction at very low normal loads and for very small contact areas is important for the development of micro devices. High performance hard coatings such as diamond-like carbon (DLC) films and improved surfaces with nanostructures are being investigated with respect to their friction reduction properties.…
CeO2 based materials are promising candidates as solid oxide electrolytes within fuel cell systems. In this capacity, the oxygen anion conductivity is pivotal. Sata et al. [Nature, 2000, 408, 946–949] demonstrated the ability to ‘fine tune’ conductivities in BaF2 and CaF2 by generating BaF2/CaF2 heterolayers with diff…
Mesoporous MgAl2O4 spinel monolith was synthesized by the nanocasting pathway; high activity in CO oxidation was observed over gold catalysts based on such monoliths as support.
The novel gadolinium(III) containing compounds (CH3NH3)2[Gd2(CCl3COO)6(H2O)6](CCl3COO)2.2CCl3COOH (1) and (NH3CH3)2[Gd4(OH)4(CCl3COO)10(H2O)6].2H2O (2) were synthesized and structurally characterized by X-ray crystallography. In the crystal structure of 1 the gadolinium ions are bridged by carboxylate groups to dimers…
A novel preceramic polymer suitable to form a SiBCN ceramic was synthesized by hydroboration reaction of 1,3,5-trivinyl-1,3,5-trimethyl-cyclotrisilazane with borane dimethylsulphide. The obtained polymer denoted as poly(borosilazane) was characterised by FT-IR and NMR spectroscopy and its thermal stability was studied…
Low-oxygen-content Si-C fibers (Hi-Nicalon) with 0.5 wt% oxygen were prepared from polycarbosilane with electron beam irradiation curing and pyrolysis. The thermal stability of the Hi-Nicalon fibers was significantly improved compared to Si-C-O fiber (Nicalon) with 12 wt% oxygen. However, creep deformation occurred in…
A novel chain-like silver polyoxotungstophosphate is formed when Ag(I) metal centres, exhibiting an unusual eight-coordination fashion, bridge a monolacunary [PW11O39]7- anion to four bridging mu2-oxygen atoms of a neighbouring lacunary alpha-Keggin anion.
A new approach to dispersion of multiwalled carbon nanotube (MWNT) in common polar solvents was reported. Here, a detailed study of nanotube chemistry by using trifluorophenyl (TFP) to modify the surface of MWNT was discussed, which was not reported before. A characterization of the reaction products using a variety o…
The bis-β-diketone-phenol ligand H3L reacts with Co(OAc)2 to become part of di- or trinuclear complexes in various conformations, depending on the nature of the co-ligand present in the reaction. Thus, the following series of complexes have been synthesized: [Co2(HL)2(Solv)4] (Solv = py, 1; MeOH, 2), [Co2(HL)2(LL)2] (…
Five different types of tubing materials, namely, polytetrafluoroethylene (PTFE), perfluoroalkoxy (PFA), fluorinated ethylene propylene (FEP), high density polyethylene (HDPE), and polyvinyl chloride (PVC) were evaluated for ammonia adsorption at two nominal ammonia concentration values (1 and 10 ppm) at ~24C. All tub…
A summary of recent advances on the chemistry and photophysics of silylene-spaced divinylarene copolymers is presented. The silicon moieties have been shown to serve as an insulating spacer in these copolymers. The photophysical studies have provided useful insights into how chromophores in polymers interact intramole…
A computer model was developed to simulate the thermal desorption flux of hydrogen from steel specimens by an explicit finite difference method, which is convergent and stable for all time increment. The influences of experimental parameters, e.g. ramp rate, specimen size and duration of exposure at ambient temperatur…
We have studied the removal of sessile oil drops from stainless-steel surfaces under the action of water flow. A shear-flow cell is used to compare bare and polysiloxane-coated stainless-steel surfaces. We consider a rectangular channel where initially deposited drops are subjected to drag, gravity and pressure gradie…
We report a novel and facile approach to the preparation of hollow superparamagnetic magnetite/polystyrene nanocomposite microspheres by the interfacial polymerization technique. The polymerization is initiated by the free radicals at the surface of magnetite nanoparticles (MPs) which are located at the oil/water inte…
Enhancement of the Electrocatalytic Oxidation of Methanol at Pt ∕ Ru Nanoparticles Immobilized in Different WO3 Matrices, Barczuk, Piotr J., Tsuchiya, Hiroaki, Macak, Jan M., Schmuki, Patrik, Szymanska, Dorota, Makowski, Oktawian, Miecznikowski, Krzysztof, Kulesza, Pawel J.
Low temperature irradiation can significantly harden metallic materials and often lead to strain localization and ductility loss in deformation. This paper provides a review on the radiation effects on the deformation of metallic materials, focusing on microscopic and macroscopic strain localization phenomena. The typ…
Three new trinuclear complexes based on [Cu(Ln)]2+ (L1 = 1,5,8,12-tetramethyl-1,3,6,8,10,13-hexaazacyclotetradecane, L2 = 1,3-propanediamine (tn)) and [M(bpb)(CN)2]− (bpb2− = 1,2-bis(pyridine-2-carboxamido)benzenate, M = Fe or Cr) have been synthesized and characterized structurally and magnetically. The Cu(II) ions a…
Self-assembling particles were prepared by a new synthetic strategy for a raspberry-like aggregate, based on three-dimensional particle-aniline oligomer-particle repeated sequences; this one-step process, without the need for extra control, organic solvents, or ligand exchange, could further help in the realization of…
Selective aerobic oxidation of benzylic alcohols and of activated aromatic hydrocarbons occurs in supercritical CO2 as reaction medium using H5PV2Mo10O40 as a quasi-heterogeneous catalyst without further additives or co-solvents; efficient recycling is possible and no metal leaching is detectable in the product stream.