Materials Literature
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We present studies of the optical properties of the new nonlinear material BiB3O6 for second harmonic generation from the visible to infrared. We have determined the phase-matching conditions and effective nonlinear coefficients in the three principal optical planes, acceptance bandwidths, spatial and temporal walkoff…
In this review we describe and discuss recent results on the linear dielectric response of high-permittivity dielectric crystals and ceramics in the wide frequency range 102–1014Hz. Our attention is paid to materials which exhibit some interesting low-frequency polar-phonon anomalies in combination with some additiona…
The corrosion behavior of a Mg-based alloy, WE43, ac/dc anodized using a waveform involving a final period of current decay in an alkaline silicate solution, has been investigated using electrochemical impedance spectroscopy during exposure to a 0.86 M NaCl solution. The change of the oxide film morphology with immers…
Abstract The macroscopic electrooptic activity of organic materials depends upon the molecular hyperpolarizability, beta, of individual organic chromophores and upon the product of number density, N , and noncentrosymmetric order, <cos 3 theta>, of the chromophores in a hardened polymer lattice. Quantum…
We describe a facile procedure for one step, large-scale synthesis of AuPt bimetallic hollow tube-like 1-D nanomaterials and hollow nanospheres, which can be easily manipulated by merely changing the concentration of citric acid.
This communication contains data from a comparison between the detection limits obtained using surface enhanced resonance Raman scattering (SERRS) and fluorescence detection of dye labelled oligonucleotides. The results show that the detection limits for SERRS are generally at least three orders of magnitude lower tha…
Sugarsilanes, alkoxysilanes derived from sugars and sugar alcohols including glycerol, sorbitol, maltose and dextran, were hydrolyzed to prepare monolithic, mesoporous silicas. Unlike conventional alkoxysilanes such as tetramethylorthosilicate (TMOS) and tetraethylorthosilicate (TEOS), the sol–gel hydrolysis and cure…
The critical issues facing the development of economically competitive solid oxide fuel cell (SOFC) systems include lowering the operation temperature and creating novel anode materials and microstructures capable of efficiently utilizing hydrocarbon fuels. In this paper, we report our recent progress in developing mo…
As-grown and modified single-walled carbon nanotubes (SWCNTs) have been used as electrochemical active materials of electrode for electrochemical capacitors (supercapacitors). A series of modified SWCNTs has been obtained by oxidation of the as-grown SWCNTs in air at increasing temperatures in the range 300-550°C. The…
The exploitation of membranes within the chemical industry is an area of growing interest. Inorganic membranes promise high stabilities even under high temperature conditions (>200 °C). In addition, very high selectivities can be attained when dense ion-conducting membranes are employed. Here the characterisation of s…
A polypyrrole film, prepared electrochemically from a methyl benzoate solution of tetra-n-butylammonium bis(trifluoromethanesulfonyl)imide (TBATFSI), showed 26.5% strain and 6.7 MPa stress induced electrochemically in aqueous LiTFSI solution.
In this paper we consider double split-ring resonators recently suggested and used as inclusions in artificial composites with negative real parts of the permittivity and permeability (Veselago media). In the known literature, the polarization effects in these particles are not completely explained. Here, an analytica…
A mesoporous material based on aluminosilicate mixture was studied to investigate its ability to include drugs and then release them. Nonsteroidal anti-inflammatory agents such as diflunisal, naproxen, ibuprofen and its sodium salt have been used in this study. The preparation of the mesoporous material and its charac…
Three new Mn(III) porphyrin catalysts of O2.-dismutation (superoxide dismutase mimics), bearing ether oxygen atoms within their side chains, were synthesized and characterized: Mn(III) 5,10,15,20-tetrakis[N-(2-methoxyethyl)pyridinium-2-yl]porphyrin (MnTMOE-2-PyP(5+)), Mn(III)5,10,15,20-tetrakis[N-methyl-N'-(2-methoxye…
A nonisothermal phase field model for alloys with multiple phases and components is derived. The model allows for arbitrary phase diagrams. We relate the model to classical sharp interface models by formally matched asymptotic expansions. In addition we discuss several examples and relate our model to the ones already…
Some salientfeatures of platinum group metal compounds with sulfur, selenium or tellurium, known as chalcogenides, primarily focusing on binary compounds, are described here. Their structural patterns are rationalised in terms of common structural systems. Some applications of these compounds in catalysis and material…
The controlled growth of poly(glycidyl methacrylate) (PGMA) and poly(GMA-co-MMA) brushes by atom transfer radical polymerization (ATRP) in methanol/water has been demonstrated on silicon wafer surfaces. A polymerization system using copper(I) bromide, copper(II) chloride and 2,2′-dipyridyl was found to produce a nearl…
Gold nanoparticles passivated by a monolayer of functional thiolates represent a new promising tool in supramolecular chemistry since they allow the preparation of complex, self-organized, polyvalent structures with a very modest synthetic effort. These systems have sizes comparable to those of many biological molecul…
A novel backward directional coupler, composed of a conventional microstrip (CμS) line and composite right/left-handed (CRLH) line, is proposed. This coupler is functionally backward but it is based on a forward-type coupling phenomenon. The coupler is shown to exhibit broad bandwidth and tight coupling characteristic…
Crystal engineering has become an established part in various segments of industrial research. The toolbox of crystal engineering not only offers design strategies for performance chemicals and characterization tools for active ingredients but also helps to provide fundamental concepts for understanding the principles…