Materials Literature
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In this article the plasma-chemical synthesis of nanosized powders (nitrides, carbides, oxides, carbon nanotubes and fullerenes) is reviewed. Nanosized powders - nitrides, carbides, oxides, carbon nanotubes and fullerenes have been successfully produced using different techniques, technological apparatuses and conditi…
Synthesis of metal sulfide semiconductor nanoparticles of group II-VI; namely ZnS, PbS, CdS, and CuS; by mechanochemical method was carried out in a high energy ball mill from corresponding metal acetates and sodium sulfide. The samples were continuously milled for 10 h with sample withdrawal at 2 h time interval. Str…
Photoluminescent (PL) porous layers were formed on p-type silicon by a metal-assisted chemical etching method using H 2 O 2 as an oxidizing agent. Silver particles were deposited on the (100) Si surface prior to immersion in a solution of HF and H 2 O 2 . The morphology of the porous silicon (PS) layer formed by this…
A suspension of semiconducting graphene oxide/polyaniline (GO/PANI) composite particles dispersed in silicone oil is considered as one of the potential candidates for an electrorheological (ER) fluid. The GO/PANI composite was synthesized by using chemical oxidation polymerization of aniline in the presence of a GO di…
A series of 18 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid amide (DOTAM)-alkyl derived complexes with selected late lanthanide(III) cations (Dy 3+ , Tb 3+ , and Tm 3+ ) has been synthesized; their magnetic properties have been evaluated and compared to those derived from DOTAM. Peralkylation of cyclen wit…
The original system useful for analysis of signals recorded during investigations of partial discharges within power oil transformers by means of acoustic method is presented. This method includes the basic and advanced analysis of recorded data. In the frame of basic analysis of data recorded signals undergo ltration…
A set of four linear alkyl chain 1,3-bis-dialkylamino-2-propanol (2-2OH-2, 4-2OH-4, 6-2OH-6, 8-2OH-8), were used in this work to evaluate the effect of carbon chain length on the adsorption and corrosion behavior of steel Q235 in simulated concrete pore solution containing 0.3 mol/L NaCl by electrochemical techniques,…
We have electrochemically synthesized polyaniline nano fibers with optimized process parameters (viz. concentration of monomer and dopant, applied current density, deposition time, etc.) on ITO coated glass substrate. The nano fibers of polyaniline were subjected to UV Visible, SEM and Raman spectroscopy. UV Vis spect…
The effect of modifying additions of powder and compact (in the form of chips) tungsten on the formation of the primary structure of the R6M5-type tungsten-molybdenum high-speed steel has been investigated. The results of metallographic and electron microprobe analyses of base and modified steels have been discussed.…
Transport properties of silver selenomolybdate glassy ionic conductors have been reported for wide composition and temperature ranges. It has been observed that the transport properties of these glasses depend strongly on the modifier content as well as on the glass formers ratio. A direct correlation between the ion…
Abstract The compound 1,1′-diethyl-2,2′-cyanine iodide forms a chiral fluorescent self-aggregate in aqueous solution at high salt concentration. This compound shows reversible quenching and emitting behaviors and exhibits an interesting on–off switching of thermochromic circularly polarized luminescence behavior as a…
Abstract Molecular dynamics simulations were performed to study the influence of system size on wave propagation and deformation patterns in 〈1 0 0〉/{1 0 0} copper nanobars with square cross-section under symmetric longitudinal impact loading. Nanobars of longitudinal length 100 a with cross-sectional edge lengths h =…
Acrylic ternary cholesteric copolymers that selectively reflect light in a wide temperature range and carry functional carboxyl groups are synthesized and characterized. As shown by X-ray diffraction analysis, differential scanning calorimetry, optical microscopy, spectroscopy, and transmission electron microscopy, th…
The fluorescence of strongly polar water-soluble phthalocyanine (2,3,9,10,16,17,23,24-octa-[(4-carboxylate)-phenoxy]phthalocyanine) and styrene-alkyl (meth)acrylate latex copolymers either unmodified or phthalocyanine-modified is studied with the use of emission spectroscopy in the excitation wavelength range of 240–3…
The corrosion inhibition of mild steel in 0.5 M H2SO4 solution by cationic surfactants, cetylpyridinium chloride (CPC) and cetylpyridinium bromide (CPBr) was studied by potentiodynamic polarization curves. The results showed that the counter ions of these surfactants, i.e., chloride and bromide, and the addition of ch…
To clarify the graphene formation process on a diamond C(111) surface, changes in the chemical bonding state caused by annealing in vacuum were investigated by photoelectron spectroscopy using synchrotron radiation. It was difficult to study the formation of sp 2 -bonded carbon atoms on a diamond C(111) surface using…
Superparamagnetic iron oxide nanoparticles (SPIONs) comprise a fundamental technology class within the emerging field of nanomedicine, and have been extensively researched for cancer imaging and therapy. This review article will discuss the chemistry and design considerations associated with the synthesis of SPIONs an…
This investigation deals with the morphology and properties of polycarbonate (PC)/clay nanocomposites prepared by melt-blending and solution-blending, using benzyltriphenylphosphonium modified montmorillonite (BTPP + -MMT) clay. Isothermal thermogravimetric analysis of the BTPP + -MMT at 280 °C revealed higher stabili…
In the present work, we used Raman spectroscopy as sensitive tool for characterization of dispersion of electron-phonon resonances in one-layer graphene. We analyzed Stokes and anti-Stokes components of the Raman spectra to investigate the temperature dependence of the graphene G-band on the power of exciting radiatio…
Gold nanoclusters supported on SiO2 and HOPG are experimentally investigated by the reflection electron energy-loss spectroscopy. Two different trends in the size-dependence of the position of the energy-loss peak corresponding to the interband Au 5d --> 6s6p transition is observed: a blue shift for Au clusters on SiO…