Materials Literature
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The article reports on significant changes occurring in the structure under treatment of Nb 2 O 5 and 2 O 5 ceramics by a concentrated light flux (CLF). The changes comprise, in particular, appearance of micro-and nanostructures, as well as changing type of chemical bonding and coordination number of polyhedrons. Thes…
In the presentinvestigation, the effect of hybridization on mechanical properties on coir and sisal reinforced polyester composite (CSRP), coir and jute reinforced polyester composite (CJRP), jute and sisal reinforced polyester composite (JSRP) were evaluated experimentally. Composites were fabricated using compressio…
A new methodology is described for the removal of surface oxide scale from single crystal aerospace castings of nickel based superalloys using anodic electrolytic etching (electropolishing) with a novel choline chloride based ionic liquid, also known as deep eutectic solvent. This method enables the removal of scale f…
Using the enantiomeric bis-bidentate bridging ligands (+)/(-)-2,5-bis(4,5-pinene-2-pyridyl)pyrazine (L(S)/L(R)) and depending on the ratio control of reactants, two mono- and dinuclear Eu(III)-based enantiomeric pairs with the formulae Eu(dbm)(3)L(R/S)·2H(2)O (L(R) in R-1, L(S) in S-1 and dbm = dibenzoylmethanato) and…
Silver nanoparticles with spherical and triangular shapes were prepared in a convenient way (simple and rapid) at room temperature by chemical reduction method. The obtained Ag NPs were characterized by transmission electron microscopy and UV-visible spectrophotometer. The results indicated that, as silver nitrate, po…
Nowadays with ever increasing demand of energy, developing of alternative power sources is an important issue all over the world. In this respect we have prepared nanocomposites based on metal oxide (titanium oxide) coated multiwalled carbon nanotubes (MWCNTs)/polyaniline (PANI) with graphene and without graphene and…
An electron donor-connecting water-soluble porphyrin, meso-(1-pyrenyl)-tris(N-methyl-p-pyridinio)porphyrin, did not demonstrate singlet oxygen generating activity under photo-irradiation. The interaction with DNA successfully recovered the photosensitized singlet oxygen generation by this porphyrin.
In the past decades, glass-ceramics embedded with nanocrystals have been proved to be one kind of the most promising photonic materials for applications in optical amplifiers, tunable solid-state lasers, luminescent solar concentrators and up-conversion luminescence devices, etc. Transition metal ions and rare-earth i…
Large yield and low temperature growth of nanostructures are key requirements for fulfilling the demand of large scale applications of nanomaterials. Here, we report a highly efficient chemical method to synthesize high quality hexagonal ZnO nanoparticle and nanorods utilizing the low temperature oxidation of metallic…
An amino acid-substituted bile acid forms tubular aggregates with inner and outer diameters of about 3 and 6 nm. The diameters are unusually small for surfactant self-assembled tubes. The results enhance the spectrum of applications of supramolecular tubules and open up possibilities for investigating a novel class of…
A method that allows partial denaturation of protein ligands in Bi- and Zn-protein complexes, leaving the metal coordination centre intact, was developed. It was based on the reduction of the S-S bridges with tris(2-carboxyl)phosphine followed by derivatization with iodoacetamide. Consequently conditions that allow th…
A novel magnetically recoverable catalyst in which protonated peroxotungstate was immobilized into a network of cross-linked chitosan with a superparamagnetic Fe3O4 core (Fe3O4–CS/HWO) was prepared, characterized and used in oxidation reactions. With H2O2 as oxidant, a wide range of substrates including olefins, sulfi…
Carbazole-containing porphyrinoid was synthesised for the first time via Suzuki-Miyaura cross-coupling reaction. Oxidation with MnO(2) yielded its porphyrin-state featuring macrocyclic aromaticity in exchange for the loss of the resonance energies of the benzene rings.
A triethylene glycol (trigol) based simple approach is reported for the reduction of graphite oxide (GO). This protocol produces high quality graphene which we term as trigol reduced graphene (TRG) and its relevant properties including electrical conductivity and energy storage capacity are comparable to those of grap…
A family of polyoxometalate compounds based on Preyssler anions and lanthanide cations, K(5)Na(5)[{Pr(4)(H(2)O)(12)(pydc)(4)}{Na(H(2)O)P(5)W(30)O(110)}]·46H(2)O (1, H(2)pydc = pyridine-2,6-dicarboxylic acid), Na(7)[{Pr(4)(H(2)O)(20)(pydc)(2)(Ac)}{Na(H(2)O)P(5)W(30)O(110)}]·23H(2)O (2), and Na(10)H(2) [{Ln(2)(H(2)O)(10…
In this work bactericidal study of silver nanoparticles was taken up in combination with two standard antibiotics, ampicillin and gentamycin, for Salmonella Typhi. The antibacterial activities of antibiotics were increased in the presence of AgNPs against test strains. The higher enhancing effect was observed for ampi…
A tetrazole-based ligand forms a supramolecular gel in the presence of transition metal ions, particularly Zn2+, Cu2+ and Co2+. The gels have been characterized by SEM, TEM, fluorescence spectroscopy, rheometry and fluorescence microscopy. The polymer exhibits a strong fluorescence enhancement upon gel formation. Acco…
We have investigated surface CO oxidation on "inverse catalysts" composed of SnO(x) nanostructures supported on Pt(111) using X-ray photoelectron spectroscopy (XPS), low-energy ion scattering spectroscopy (LEISS) and temperature-programmed desorption (TPD). Nanostructures of SnO(x) were prepared by depositing Sn on Pt…
Langmuir polymer films (LPFs) are very interesting systems to probe quasi-two dimensional dynamics. Although adsorbed on water, the substrate is fluid enough to avoid irreversible pinning at adsorption sites, as with solid substrates. LPFs in dense states can exhibit a high degree of metastability, however reproducibl…
High specific surface area (approximately 4000m2/g) rice hull based porous carbon was carbonized at 400°C for 2 h, followed by alkali hydroxide activation and heating to 800°C. The effects of preparation parameters on the characteristics of these rice hull based porous carbon were studied; the properties of these samp…