Materials Literature
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The transmission and reflection scattering parameters of arrays of single-wall carbon nanotubes (SWCNTs) directly assembled onto coplanar waveguides (CPWs) have been measured from 0.01to50GHz at room temperature. Typical arrays consisted of roughly ∼103 SWCNTs aligned parallel to the electric field polarization of the…
Abstract Hexamethyldisilazane was used as the starting material to synthesize N , N ′‐bis(hydroxydiphenylsilanyl)tetraphenylcyclodisilazane (BHPTPC). By condensation polymerization of BHPTPC with α,ω‐bis(dialkylamino)dimethylsiloxane, a series of alternate copolymers containing N , N ′‐bis(diphenylsilyl)tetraphenylcyc…
Abstract A soft computing approach to model the structure–property relations of nonwoven fabrics for filtration use is developed. Because the number of samples is very limited, the artificial neural network model to be established must be a small‐scale one. Consequently, this soft computing approach includes two stage…
Abstract Summary: A series of new poly(aryl ether ketone‐benzoxazole)s (PAEKBOs) with hexafluoroisopropylidene moieties were synthesized directly by the aromatic nucleophilic polycondensation of 2,2′‐bi[2‐(4‐fluorophenyl)benzoxazol‐6‐yl]hexafluoropropane(6F‐BO), 4,4′‐difluorobenzophenone (DFBP) and 4,4′‐(hexafluoroiso…
The synthesis, stable existence regions, structure, and migration characteristics of complex oxides of the BIMEVOX family were studied experimentally and theoretically. The temperature, composition, and oxygen partial pressure dependences of the conductivity of the samples obtained were determined. The contribution of…
The nanocrystalline (40nm) samples of Pb(Fe0.50Nb0.50)O3 (PFN) and Pb0.90Ba0.1(Fe0.5Nb0.5)O3 (PBFN) were synthesized by mechanosynthesis and mixed oxide methods. Preliminary structural analysis of these samples showed that tetragonal PFN can be distorted to orthorhombic structure on 10% Ba substitution in it. One of t…
Abstract A survey and comparison of several low pressure plasma‐based approaches to fluorocarbon polymer surface modification is reported including “simple” plasma treatment, “grafting to” and “grafting from” plasma activated surfaces, plasma immobilization of predeposited molecules and the adsorption of charged macro…
Abstract In stretch blow molding (SBM) process, the preform growth during the stretching and blowing is critical to the thickness distribution and properties of the final bottle. Whereas the thickness distribution is one of the most important criteria in the production of bottles. So this work focused on the polyethyl…
Abstract This article presents a systematic study of how point defects, such as SW‐defects and vacancies, influence the properties of nanotubes. The DFT calculations show that large atomic relaxations at vacancies leads to a contraction of the nanotube. The formation energy E form , has a curvature, chirality and a fa…
The pressure response of the ultraviolet photoluminescence of ZnO nanocrystallites and MgZnO nanoalloy of composition 15% Mg:85% Zn of the wurtzite structure was studied. The authors found that up to 7GPa the pressure coefficients of ZnO and MgZnO are 23.6 and 27.1meV∕GPa, respectively. The pressure coefficient of the…
The heterogeneous phase equilibria in the rhenium-oxygen system (over a composition range of Re2O7-Re) were studied using differential thermal analysis, x-ray diffraction analysis, and tensimetry. The system was found to contain the equilibrium phases of Re2O7, cubic ReO3, and orthorhombic ReO2. A region of homogeneit…
Abstract Composites of linear low‐density poly(ethylene‐ co ‐butene) (PE) or maleated linear low‐density poly (ethylene‐ co ‐butene) (M‐PE) and cellulose (CEL), cellulose acetate (CA), cellulose acetate propionate (CAP), or cellulose acetate butyrate (CAB) were prepared in an internal laboratory mixer with 20 wt % pol…
Magnetoelectric Aurivillius phase Bi6Ti3Fe2O18 is obtained by molten salts synthesis (MSS). A description of the experimental conditions for preparing the compound is given. Scanning electron microscopy observation reveals that obtained crystallites show plate-like shape, with small size dispersion. MSS allows efficie…
Abstract The structural, morphological and optical properties of vacuum‐evaporated CdSe thin films were investigated as a function of the substrate temperature and the post‐deposition annealing conditions. It was observed that the grain sizes and morphologies of as‐deposited layers were similar for substrate temperatu…
A substitution-reaction route has been demonstrated as an efficient synthesis route for producing single-walled and multiwalled B10N nanotubes (BNNTs). The nanotubes have diameters smaller than those of the starting carbon nanotubes and also have similar lengths to the starting carbon nanotubes. The isotopic ratio of…
Abstract Nanocomposite powders from polypropylene filled with surface modified and unmodified fumed silica have been prepared from polymer solution to achieve improved mixing and have been forwarded to fiber melt spinning. The surface of the fumed silica was modified with dodecyl alkoxy silanes. Crystallization veloci…
Abstract We present a comparative structural–vibrational study of nanostructured systems of V 2 O 5 : nano‐urchin (VONURs) which are spherical structures composed of a radially oriented array of VOx nanotubes (VOx‐NTs) with a volumetric density of ∼40 sr –1 , and vanadium oxide nanorods (VOx‐NRDs) with an average leng…
Amphoteric dopants are widely used in BaTiO3-based dielectrics to improve capacitor reliability. In this work, an analogous approach was explored for barium strontium titanate thin films. Ba0.7Sr0.3TiO3 thin films were prepared by chemical solution deposition. Er was used as a dopant to decrease the leakage current an…
Abstract We report new results on the electron spin resonance of single walled carbon nanotubes, peapods and double walled carbon nanotubes. A small ESR line is present in well purified samples and its temperature dependence reveals a striking ‘super‐Curie’ paramagnetic rise. In addition, we identify a narrower line i…
Abstract Summary: Novel hyperbranched polyphenylenes based on both an A 2 + B 3 and an AB 2 + AB approach were synthesised and characterised. Different monomers were prepared and polymerised using a Diels‐Alder reaction with subsequent decarbonylation. The polymer backbones consist of hexaphenylbenzene units which are…