Materials Literature
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Al-doped ZnCoO films were grown by sol-gel process onto SiO2 and Si(100) substrates. Structural analysis shows that all samples have the hexagonal würtzite structure with a slight preferential orientation along the c-axis. The insertion of Al and Co into the ZnO matrix has been experimentally evidenced by UV-visible s…
Abstract Summary: The paper highlights recent developments in polysaccharide chemistry. Cellulose tert‐butyl‐ and thexyldimethylsilyl ethers with degree of substitution up to 2 were accessible and comprehensively characterized by means of NMR spectroscopy. These derivatives enable the preparation of 3‐ O ‐functionaliz…
In this paper, two non-destructive thermal methods are used in order to determine, with a high degree of accuracy, three-dimensional polarization distributions in thin films (12 mum) of poly(vinylidenefluoride-trifluoroethylene) (PVDF-TrFE). The techniques are the frequency-domain Focused Laser Intensity Modulation Me…
Abstract The heterometal alkoxide clusters of Group 3 metal and lanthanides with sodium Ln 2 Na 8 (OCH 2 CH 2 NMe 2 ) 12 (OH) 2 (Ln=Y, lanthanide) were found to serve as highly active catalysts for the Tishchenko reaction of various aldehydes to form the corresponding esters. The reaction scope and the influence of la…
The thermal expansion coefficient (TEC) of an ideal crystal is derived by using a method of Boltzmann statistics. The Morse potential energy function is adopted to show the dependence of the TEC on the temperature. By taking the effects of the surface relaxation and the surface energy into consideration, the dimension…
This paper presents an overview of the principal features of the recently developed model for the short and the long-term marine corrosion of steels. In marine environments such as immersion, tidal and coastal atmospheric, chlorides conventionally are considered to play a major role in causing corrosion loss. The actu…
The conference on Nanotoxicology: Health & Environmental Impacts was organized by Euroscicon (Welwyn Garden City, UK), a team of professionals working towards the continuous improvement of technical knowledge transfer for all scientists, and hosted by 'BioPark', a research and development center in Welwyn Garden City,…
Abstract In this study, films of poly[1‐(4‐methoxyphenyl)‐1 H ‐pyrrole] [poly(MPPy)] were electrochemically grown on carbon fiber microelectrodes (CFMEs) in 0.05 M of tetraethyl ammonium perchlorate–dichloromethane. The effect of different monomer concentrations (range = 1–10 mM) on electrochemical properties of resul…
Abstract The generation of nanostructures by initial layer deposition and plasma etching offers a simple and cost‐effective method for imparting broadband anti‐reflection properties to polymer optics. In this study, we have investigated the possibility of controlling the structure growth on the cycloolefin polymer Zeo…
Gas-tight electrolyte films are obtained by chemical vapor deposition for solid oxide fuel cells from yttria-stabilized zirconia (YSZ) with a thickness of 4–15 μm on supporting porous ceramic anodes (YSZ/NiO). Volatile metal complexes with dipivaloylmethane Zr(dpm) 4 and Y(dpm) 3 are used as precursors. On the basis o…
Abstract A natural vulcanized rubber was treated by atmospheric dielectric barrier discharges to improve its adhesion to silicone adhesive. The different operating conditions were: (i) the nature of the plasma gas associated or not with organic precursors such as acetic acid or allyl alcohol, (ii) the concentration of…
Ferroelectric hysteresis and aging effects in multiferroic Pb(Fe0.5Nb0.5)O3 ceramics obtained through different precursors are discussed using the hysteresis loop modeling by equivalent circuit. Maximum polarization Pmax, remanent polarization Pr, and coercive field EC as functions of external electric fields are dete…
The effect of crease resistant finish on wrinkle recovery, breaking strength, tearing strength and pilling performance of 100 % cotton plain fabrics has been studied. Desizing, scouring and crease resistant finishing have been performed on the fabric and their effects are observed. A statistical analysis using a paire…
Phase separation in a binary system that results from the uphill diffusion of chemical components is investigated theoretically. We reconsider the original spinodal decomposition model of Cahn and Hilliard taking into account possible intrinsic anisotropy of the underlying system. Specifically we address the effects o…
Results of the static and dynamic dielectric investigations of 10 liquid crystalline compounds consisting of three rings (phenyl or cyclohexyl) with the n-propyl and isothiocyanato terminals, fluoro lateral substitutes, and different bridging groups (CH2CH2 and/or COO) are presented. These compounds form the nematic p…
We propose a method of spatial decomposition analysis (SDA) to study the thermodynamics of association in solution, based on three-dimensional molecular theory of solvation. We decompose the solvation thermodynamics quantities into the excluded volume and solvation shell terms and further break them down into partial…
Abstract Large quantities of gold nanoparticles (Au NPs) were prepared by physical vapour deposition (PVD) technique. The produced nanoparticles were transferred into water solutions [containing 1% of carboxymethylcellulose (CMC)]. To achieve this resuspension, the Au NPs were embedded in a NaCl matrix, also deposited…
We use Kelvin force microscopy (KFM) to study the electrostatic properties of single-walled carbon nanotube field effect transistor devices (CNTFETs) with backgate geometry at room temperature. We show that KFM maps recorded as a function of the device backgate polarization enable a complete phenomenological determina…
Abstract The surface of polyimide (PI) was modified with He/O 2 /NF 3 dielectric barrier discharge generated by 13.56 MHz r.f. at atmospheric pressure in order to improve adhesion between metal (Cu/Cr) and PI. He/O 2 /NF 3 plasma severely etched the surface of PI and formed many conical clusters of below 100 nm diamet…
Structural defects formed as a result of plastic deformation in natural diamond crystals have been studied by EPR spectroscopy. The spectra of brown, pink-brown, black-brown, pink-purple, and gray plastically deformed diamonds of type Ia from deposits in Yakutia and the Urals were recorded. The results of EPR spectros…