Materials Literature
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Preface Plasma-CVD Growth of Carbon Nano-tubes on Metal Substrates Compelling Evidence of High-Temperature Superconductivity in Carbon Nanotubes Structure, Symmetries, Mechanics and Motors of Carbon Nanotubes Silica Matrices in Synthesis of Carbon Nanotubes Collective Electronic Excitations in Carbon Nanotubes Near-fi…
Low-density polyethylene and polypropylene were thermally decomposed individually in a batch reactor at 450°C as a recycling route from the aspect of the production of petrochemical feedstock. The resulting transformation liquid products were analysed by high resolution gas chromatographic-mass spectrometric analysis.…
The foamability of thermoplastic vulcanizate (TPV) has been investigated in a customized foaming system using carbon dioxide (CO 2 ) and nitrogen (N 2 ) as a physical blowing agent. TPV or dynamic vulcanizate is a special class of thermoplastic elastomer that is produced by technological blending of a rubber and a the…
Nanophosphors of were synthesized with a salted sol-gel method. X-ray diffraction spectrum showed that was obtained after it was sintered at for . nanophosphor was a nestlike nanofiber with an average diameter of under a scanning electron microscope. Emission peaks of transitions were found at 487 and corresponding to…
A facile and efficient method has been developed for coating MWNTs with solvent resistant polymer in scCO2, which permits the selective deposition of high molecular weight fluorinated graft poly(methyl vinyl ether-alt-maleic anhydride) polymer onto MWNTs in scCO2 under 100-170 bar at 40 degrees C and forms quasi one-d…
In recent years, a number of methods for refining the structure of metals by severe plastic deformation (SPD) have been developed. Some of those methods permit grain refinement to a nanometric level. These methods include, among others, high pressure torsion (HPT), equal channel angular pressing (ECAP) and hydrostatic…
Hydrocarbon fueled cell reactions, which consist of thermal decomposition, reforming, and CO shift reactions, and electrochemical oxidation in the Ni–ScSZ anode of solid oxide fuel cells, were examined by electrochemical measurements and outlet gas analysis for several hydrocarbon fuels (, , , ). Examinations on the a…
The mechanism of formation of water-soluble, thiolate-capped PbS nanocrystals has been investigated using dynamic light scattering. An evaluation of the potential for use of these species as optical contrast agents in biological imaging applications has also been performed in terms of the responses of the nanocrystals…
Catalytic formation of nanochannels in the surface layers of both pure diamond crystallites and conductive boron-doped diamond (BDD) electrodes was performed using a few metal nanoparticles (Co, Nb, Mo, and W) in a hydrogen atmosphere. Thermogravimetry in the hydrogen atmosphere showed the beginning of the consumption…
Abstract The hot-wire silicon chemical vapor deposition (CVD) was approached by the new concept of the theory of charged clusters (TCC). The role of a hot wire is to enhance the rate of negative surface ionization producing negative ions. These ions induce nucleation and produce negatively charged silicon clusters, wh…
The Curie temperature TC of La(FexSi1−x)13 is increased by a partial substitution of Ni for Fe. On the contrary, TC is decreased by a partial substitution of Cr or Mn. In addition, a partial substitution of Ce for La in La(FexMnySi1−x−y)13 causes the further decrease of TC. As a result, La0.65Ce0.35(Fe0.85Mn0.03Si0.12…
Conductive-atomic force microscopy has been successfully used for characterizing recorded marks on commercial digital versatile disk and Blu-ray disk. Nano recorded marks beyond diffraction limit are imaged with high spatial resolution and excellent contrast of conductivity. The smallest mark size resolved is around 2…
The gelation properties of a zinc porphyrin bearing peripheral urea groups (1 x Zn) were evaluated in the absence and the presence of several diamines. In aromatic solvents such as benzene, toluene and p-xylene, 1 x Zn only provided the precipitate. In contrast, 1 x Zn with 0.5 and 1.0 equiv. of piperazine formed gels…
The proton and metal complex equilibria of trans-cyclohexane-1,2-diamine-N,N,N',N'-tetrakis(methylenephosphonic acid) (CDTP) with lanthanide(iii) ions, where Ln(III) = La(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Ho(III) and Lu(III) were studied. The stoichiometry, protonation and complex formation constants…
Electrical, thermoelectric, and structural properties were studied in transition metal ion-substituted : , , and . Structural analysis showed that a continuous series of solid solutions with no intermediate phases are forming over a wide range with substitutions of Mn and Ni, whereas the maximum Cu content is 30% from…
The oxygen stoichiometry, conductivity, and thermal expansion behavior of lanthanum strontium copper iron oxide (La0.7Sr0.3Cu0.2Fe0.8O3−δ) have been investigated because of its potential application as a cathode material for intermediate temperature solid oxide fuel cells (IT-SOFCs). The relative oxygen non-stoichiome…
A SiC powder of median size 0.8 μm was mixed with polyacrylic acid (PAA, dispersant) in a 0.3 mol/l-R(NO3)3 solution (R=Yb, Y, Gd, Sm, Nd and La) at pH 5 to adsorb uniformly the sintering additive (R3+ ion) on the SiC surface. The aqueous 30 vol% SiC suspension with 0.52 mass% PAA and 1.50 mass% R2O3 (as R(NO3)3), rel…
The study deals with changes in clay mineral associations with soil development and related implications for land users in the Lusikisiki area of the Eastern Cape Province of South Africa. Fifteen profiles, encompassing all major soil forms in the region, were investigated. The pedons developed from pre-Jurassic sedim…
This paper, a review of the state of the art of the drying process in wet porous media, presents an overview of thermodynamic relations in heat treatment of synthetic fiber fabrics. Heat and mass transfer in wet porous media are coupled in a very complicated way. The structure of the solid matrix varies widely in shap…
Abstract Density functional theory (DFT) calculations were carried out to characterize the optimal site of the protons and the precise protonation state in the polyoxometalate (POM) anions [V 13 O 40 ] 15− and [H 12 V 13 O 40 ] 3− . Six kinds of possible protonated stable isomers with the whole Keggin anion units are…