Materials Literature
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The influence of the poly(N-ethyl-2-ethynylpyridinium iodide) (PEEP-I) concentration on the morphology and optical properties of nanocomposite systems prepared by mixing the polymer solution with a hydrosol of ca. 9 nm Ag nanoparticles (NPs) was investigated by a combination of surface plasmon extinction (SPE) measure…
In this paper we report a simple one step microwave irradiation method for the synthesis of gold nanoparticles using Citric acid and CTAB as reducing agent. The expedition reaction is completed under microwave irradiation in short duration and can be applied to generation of spherical gold nanoparticles. The process w…
Shear-assisted hydrogels with thixotropic nature can be fabricated via nanofiber self-assembly by simply applying a shear force to a metastable supersaturated solution of cyclic dipeptide derivatives.
Aim of this work was to review information about natural long fibres reinforced composites focusing on interface, wettability, fibre-matrix adhesion, moisture absorption, correlating them with macroscopical mechanical properties. Weak fibre/matrix interface does not permit a complete performance exploitation in compos…
In this paper, the characteristics of electromagnetic (EM) waves supported by three dimensional (3D) periodic arrays of dielectric and magneto-dielectric spheres are theoretically investigated. The sphere particles have the potential to offer electric and magnetic dipole modes, where their novel arrangements engineer…
Self-assemblies and their hierarchies are useful to construct soft materials with structures at different length scales and to tune the materials properties for various functions. Here we address routes for solid nanofibers based on different forms of self-assemblies. On the other hand, we discuss rational "bottom-up"…
Nanoparticles of 1,2-bis[4′-methyl-2′-(2″-pyridyl)thiazolyl]perfluorocyclopentene (1) were prepared by laser ablation (355 nm) of microcrystalline powder suspensions in a water–sodium dodecylsulfate medium. AFM studies coupled with microfiltrations reveal that the resulting suspension is mostly made of nanoparticles w…
Copper and silver carbonyl and ethylene adducts supported by the highly fluorinated hydridotris(triazolyl)borate ligand [HB(3,5-(CF3)2Tz)3]- have been synthesized and characterized, and compared to the analogous complexes based on the hydridotris(pyrazolyl)borate ligand [HB(3,5-(CF3)2Pz)3]-. 1H and 13C NMR signals of…
Three different types of copper(II) complexes have been studied of the hexadentate Schiff base ligand N,N'-bis[2-{(salicylidenimine)amino}ethyl] piperazine (H2L) having the piperazine backbone in the chair form and axial-axial (a,a) N-atom lone pairs in the free state. The structure of the products is influenced by th…
In this investigation, we evaluated the microstructure of SC alloys using SEM, TEM and XRD. The composition of SC alloys was Nd14.4Fe79.6B6.0 and Nd10.4Dy3.5Fe80B6.1, and the SC alloys show petal-shape or dendritic structure at the wheel surface or the free surface, respectively. Grain size distribution is broad at th…
A series of electrochromic aromatic hyperbranched polyamides with electroactive triphenylamine (TPA) units were prepared from the phosphorylation polyamidation reactions of a newly A2B type monomer, 4-amino-4′,4″-dicarboxytiphenylamine, with AB monomer and end-capping agent, respectively. These polymers were readily s…
A sugar–pyrene-based fluorescent gelator was synthesised and characterized based on different spectral techniques. The weak interactions that exist between the pyrene moieties are responsible for gelation, which is absent in case of functionalised SWCNTs.
Small cationic Au(n)Cu(m)+ (n + m < or = 6) clusters and their monocarbonyls Au(n)Cu(m)CO+ have been studied by first-principles calculations. The trend for small Au clusters to form planar structures is weaker when some Au atoms are substituted by Cu atoms. A significant odd-even oscillation of the electron affinity…
Glyco-modification of a solid cellulose surface with lactosevia an enzymatic reaction was successfully achieved using a surfactant-enveloped enzyme (SEE) in a lithium chloride/dimethylacetamide solvent system. The unique biocatalyst, SEE, which is active in organic media, was prepared by protecting the surface of cell…
This paper reports the first systematic studies of the effect of deuteration on the polymorphic outcome of the crystallization of glycine from water, focusing on crystallization experiments carried out as a function of the level of deuteration in the system; the dependence of polymorphic outcome on the time of the cry…
Mg(NH2)2–2LiH is an attractive system because of its high reversible hydrogen capacity (∼5.6 wt%) and suitable thermodynamic parameters that allow operation below 100 °C. However, a relatively high kinetic barrier in the hydrogen desorption blocks its application at low temperature. In this work, a small amount of add…
Insulation resistance degradation of dielectric BaTiO(3) is expected to be closely correlated to its defect structure frozen in from elevated processing temperatures. For BaTiO(3), respectively doped with variable-valence (Mn(Ti)) and fixed-valence acceptors (Al(Ti)), their defect structures were frozen in by quenchin…
Glucose supply from blood to brain occurs through facilitative transporter proteins. A near linear relation between brain and plasma glucose has been experimentally determined and described by a reversible model of enzyme kinetics. A conformational four-state exchange model accounting for trans-acceleration and asymme…
The search for new biosynthetic and biodegradable materials to save nonrenewable resources and reduce global pollution problems is an urgent task. Recently, materials like thermoplastic poly-3-hydroxyalkanoates (PHA), have been found synthesized by bacteria as storage materials. The major PHAs synthesized are poly-b-h…
This paper deals with a series of new unsymmetrically substituted mesoporphyrins: 5‐(2‐hydroxyphenyl)‐10,15,20‐tris‐phenyl‐21,23‐H‐porphyrin (TPPOH O ), 5‐(3‐hydroxyphenyl)‐10,15,20‐tris‐phenyl‐21,23‐H‐porphyrin (TPPOH M ), 5‐(4‐hydroxyphenyl)‐10,15,20‐tris‐phenyl‐21,23‐H‐porphyrin (TPPOH P ), 5‐(2‐hydroxyphenyl)‐10,1…