Materials Literature
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Compared with the conventional particle-filled or fiber-filled polymer composites, the use of tetrapod-like zinc oxide whiskers (T-ZnO w ) as inorganic functional fillers offers a possibility to manufacture polymer composites with isotropic property using simple processing techniques. In this article, T-ZnO w has firs…
Thin films of polyaniline nanofibres were synthesized using ultraviolet irradiation of aqueous solutions of aniline, nitric acid, and ammonium peroxydisulfate. The parent solution was spin coated on a planar substrate, and allowed to polymerize in the dark for 4–5 min. The substrate was then exposed to ultraviolet lig…
We investigated the adsorption and catalytic activity of myoglobin (Mb) immobilized on colloidal particles of zirconia covalently grafted with phosphoric (ZrO2-P) and benzenephosphonic acid (ZrO2-BP). The maximum adsorption was reached after 1 h of contact and was greater on a hydrophilic support, ZrO2-P, compared to…
Optically active N- propargylamides bearing a porphyrin group, ( S )-HC⋮CCH 2 NHCOCH(CH 3 )OCOR ( 1 ) and ( S )-HC⋮CCH 2 NHCOCH(Ph)OCOR ( 2 ), where R = 4-(10,15,20-tris(4- tert -butylphenyl)porphyrin-5-yl)phenyl, were polymerized with (nbd)Rh + [η 6 -C 6 H 5 B - (C 6 H 5 ) 3 ] along with analogous monomers ( S )-HC⋮C…
The paper presents the current trends in medicine of regenerative tissue defect caused by resection of tumors or fractures.Although it is a relatively young field of science, it creates new possibilities for the reconstruction of pathologically altered tissue with the use of three-dimensional scaffolds.Tissue engineer…
A five-dimensional (5D) cluster model of the $S1$ superstructure phase of decagonal $\mathrm{Al}\ensuremath{-}\mathrm{Ni}\ensuremath{-}\mathrm{Co}$ quasicrystals is proposed based on the results of the structure refinement of the basic-Ni phase with the same chemical composition. This model leads to a structure compos…
To characterize UO(2) for its possible use in desulfurization applications, the interactions of molecular sulfur dioxide (SO(2)) with a polycrystalline uranium dioxide film have been studied by means of X-ray photoelectron spectroscopy (XPS), temperature-programmed desorption (TPD), and low-energy ion scattering (LEIS…
N-Arylation of the pyridinium electron acceptor unit in stilbazolium chromophores has been found by previous experimental hyper-Rayleigh scattering and electronic Stark effect (electroabsorption) spectroscopic studies to lead to substantial increases in the static first hyperpolarizability beta(0). We show here that I…
1-Phosphanorbornadiene derivatives were grafted onto various periodically organized mesoporous powders, including a new zirconia/silica mixed oxide synthesized by aerosol techniques. After complexation with the [Rh(CO)2]+ fragment, these materials were revealed to be more active in olefin hydrogenation than their homo…
Atomic force microscopy was used to characterize an anatase TiO2 surface, prepared by the helical vapor preparation method. The forces between two bare TiO2 surfaces were measured in the presence of water at various pH values. This TiO2 isoelectric point (iep) was characterized by the presence of only a van der Waals…
Abstract Summary: Light‐induced reversible changes in elasticity of semi‐interpenetrating network (semi‐IPN) films bearing azobenzene moieties were achieved under both ultraviolet (UV) and visible light irradiation. The semi‐IPN film was prepared by a cationic copolymerization of azobenzene‐containing vinyl ethers in…
Abstract Films containing different volumes of latex of natural rubber (NR) in a fixed mass of poly (vinylidene fluoride) (PVDF) powder were fabricated by compressing under annealing a mixture of both materials without using any solvent. This is an important issue keeping in mind that these films have to be used in th…
The normal Raman and SERS spectra of 5-fluorouracil (5-FU) in water solution and attached to a biological artificial model (a silver colloid) at different pH values were recorded and discussed. The DFT calculation results helped us to establish for the first time the most stable resonance structure for each of the tau…
Diamond-anvil cell experiments augmented by first-principles calculations have found a remarkable stability of the ${\mathrm{N}}^{3\ensuremath{-}}$ ion in ${\mathrm{Li}}_{3}\mathrm{N}$ to a sixfold volume reduction. A new ($\ensuremath{\gamma}$) phase is discovered above $40(\ifmmode\pm\else\textpm\fi{}5)\text{ }\text…
The synthesis of a new 15-membered polyaza-macrocyclic ligand L3H3, which is based on a 2,2'-bipyridine moiety and a diethylenetriaminetriacetic acid core, is reported. The lanthanide chelates of this octadentate ligand were programmed for bimodal probes, luminescent agents (Sm, Eu, Tb, Dy), and magnetic resonance ima…
In the current work we demonstrate a facile and versatile way to create hydrophilic polymeric capsules by integration of Au nanocrystal templating, surface-initiated atom-transfer radical polymerization, and selective chemical cross-linking of polymer shells. Capsules of the homopolymer of 2-(dimethylamino)ethyl metha…
Abstract Polymer‐nanometallic‐particle composites have demonstrated technological potential owing to their unique optical and electrical properties. In this article, we report on composites prepared via physical vapor deposition of gold metal onto pliable polydimethylsiloxane (PDMS) polymer. Rapid Au diffusion and nan…
The luminescence efficiency of polymer light-emitting diodes is enhanced to more than double by doping ZnO nanorods into the poly-(3,4-ethylenedioxythiophene):poly-(styrenesulphonic acid) (PEDOT:PSS) hole buffer layer. It was demonstrated, by means of the optical and electrical characteristics and Raman spectroscopy,…
Electron thermalization and electron–phonon relaxation in metals can be studied by measuring the transient change in sample reflectivity after excitation with a femtosecond laser pulse. This paper describes experiments on ferromagnetic nickel thin films, in particular addressing the analysis of the reflectivity data a…
The magnetic properties of ${\mathrm{La}}_{0.5}{\mathrm{Ca}}_{0.5}\mathrm{Fe}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ perovskites with different oxygen vacancy contents were comprehensively investigated by means of x-ray diffraction, M\"ossbauer spectroscopy, and magnetization measurements. A glassy magnetic…