Materials Literature
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Effective cationic dye-sensitized nanocrystalline titania solar cells employing an elastomeric copolymer of ethylene glycol and epichlorohydrin as electrolyte and I–/I3– as mobile redox carrier system have been developed by these authors. The key feature of the copolymer is its ability to penetrate the pores of the Ti…
The role, including concentration, conformation, and bioactivity, of adsorbed vitronectin in enhancing osteoblast adhesion on nanophase alumina was investigated in the present study. Vitronectin adsorbed in a competitive environment in the highest concentration on nanophase alumina compared to conventional alumina. En…
TiO 2 -based powder, including 0.1 at% of N doped in the rutile lattice, has been synthesized by oxidation of TiN. As a result, a significant shift of the absorption edge to a lower energy in the visible-light region has been observed. The substitutional doping of N into the TiO 2 lattice is found to be effective; its…
Many inorganic and organic materials exhibit redox states with distinct electronic (UV-vis) absorption bands. When the switching of redox states generates new or different visible region bands, the material is electrochromic. Electrochromic materials are currently attracting much interest in academia and industry for…
Different kinds of safe, common, and low-cost compounds were proven to be good solvents/precursors for the synthesis of high quality CdSe nanocrystals. The size, shape, and crystal structure of CdSe nanocrystals synthesized by these alternative routes can be varied in a controllable manner in a very broad size range,…
Blends of polypropylene (PP) and acrylonitrile rubber (NBR) were prepared in a Haake 9000 Rheocord System. Two different phenolic resins were introduced into these blends and the effect of this third component on the mechanical properties was evaluated, as well as the relationship between the crystallization of the po…
Structural and morphological parameters, together with processing conditions, determine the type of fracture behavior of polyethylene (PE). Long-time brittle failure, which occurs under low stresses and at room temperature, limits the lifetime of polyethylene pipes, which are used for water and gas distribution. To op…
Polypropylene (PP) composites containing calcium carbonate (CaCO3) filler and/or impact modifiers were prepared and investigated as a function of composition. The effects of surface treatment of filler particles and type of impact modifiers were studied. Characterization of composite microstructure was discussed in re…
This review describes the interfacial behavior of biomolecules, which were converted to more hydrophobic derivatives by covalent attachment of hydrophobic chains. The molecules presented are proteins (glucose oxidase, immunoglobulin G, gelatin, ovalbumin) and polysaccharides (carboxymethylcellulose, pullulan). In gene…
The high temperature crystal structure of the superionic compounds Ag 2 HgI 4 and Cu 2 HgI 4 has been investigated using powder neutron diffraction. In addition to the widely studied β→α superionic transitions observed in both compounds just above ambient temperature, we have characterized the transitions to phases (l…
Polymer-metal composites (PMCs) based on polyethylene (PE) and polyoxymethylene (POM) and on the blend PE/POM filled with dispersed iron or copper were prepared. Composites were produced by several methods: (1) extrusion of homopolymer (PE or POM) filled with iron, (2) extrusion of the blend PE/POM filled with iron, (…
A block single-crystal was obtained using a diffusion method with a concentrated acetone-water (vol. 1/1) solution of [Ru(phen)(3)]Cl(2).6H(2)O (phen = 1,10-phenanthroline) and a concentrated aqueous solution of K(3)[Cr(CN)(6)], without evaporating solvents. The crystal was identified as a double-complex salt includin…
The differential thermopower of a chiral carbon nanotube (CNT) was calculated using a tractable analytical approach. We obtained an expression for the electrical conductivity σ and the thermopower α. The results were numerically analysed. We noted from the values of α that the material can behave as a semimetal, n-typ…
A characteristic intermediate segregation type chain length dependence of the long period D of the lamellar microdomain structure of a class of comb−coil supramolecules is reported. The supramolecular comb−coil diblock copolymers studied consist of a polystyrene (PS) “coil” block and a “comb” block of poly(4-vinylpyri…
Cationic polymerization of hexamethylcyclotrisiloxane (D 3 ) initiated by HCl and antimony pentachloride (SbCl 5 ) may give a high polymer (HP) with controlled molecular weight in high yield, and only small amounts of cyclic compounds. Theoretical M n 's were formerly obtained with D 3 using as initiator either trifli…
This paper deals with key issues of the coating technology applied to plant materials prior to osmotic dehydration and convective drying. Coatings created with solutions of starch products and pectin were examined. It was shown that coating of foods to be dehydrated influences mass transfer in a plant tissue during os…
We present a procedure for the preparation of physically realistic models of paracrystalline silicon based on a modification of the bond-switching method of Wooten, Winer, and Weaire. The models contain randomly oriented $c\ensuremath{-}\mathrm{Si}$ grains embedded in a disordered matrix. Our technique creates interfa…
A series of manganese carboxylates were prepared by reacting aqueous solutions of glycolic, lactic, oxalic, malonic, malic, tartaric or citric acids with MnO or MnO 2 at 50–70°C. A single-crystal X-ray structure of racemic manganese(II) lactate trihydrate is presented. Addition of aminoalcohols to the carboxylate comp…
Monodisperse 5-amide nylon 6 oligomers have been isothermally crystallized at 95 °C from N, N -dimethylformamide. The crystals have been investigated using optical microscopy, X-ray diffraction, electron microsopy (imaging and diffraction), atomic force microscopy and computational modeling. The diffraction signals in…
The structural and optical properties of electron beam deposited CaS:Pb thin films were investigated as a function of annealing temperature and lead concentration. X-ray diffraction measurements show weak crystallinity for such layers. Although this improves with higher annealing temperatures, no difference in the gra…