Materials Literature
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Two series of rare-earth isophthalates of the general formula, [M(2)(H(2)O)][{C(6)H(4)(COO)(2)}(2){C(6)H(4)(COOH)(COO)}(2)].H(2)O, M=La (I), Pr (Ia), and Nd (Ib) and [M(2)(H(2)O)(2)][{C(6)H(4)(COO)(2)}(3)].H(2)O, M=Y (II), Gd (IIa), and Dy (IIb) have been prepared by the reaction of the corresponding trivalent lanthan…
Highly luminescent and stable calixarene (CA[n], n = 4, 7) coated silica nanospheres englobed with CdTe nanocrystals were prepared via a sol–gel technique in aqueous media, and were characterized by luminescence spectroscopy, ultraviolet-visible spectroscopy (UV-vis), FT-IR spectroscopy, transmission electron microsco…
A new method was developed for the conjugation of multivalent dendritic groups to polymer vesicle surfaces.
The programmed assembly of molecules into supramolecular polymers is of great interest for developing stimuli-responsive "smart" materials. Controlling the morphology, dynamics and responsiveness of such materials is essential for future applications. It, however, necessitates fundamental understanding of non-covalent…
Polypyrrole and its composites were prepared chemically using FeCl3 as an oxidant in aqueous and non-aqueous media. The effect of various solutions such as water, ethylacetate, acetonitrile, methylacetate, methanol, ethylmethylketone and surface active agents, poly (ethylene glycol) and poly (vinyl acetate) on the pro…
An argon glow discharge plasma was used to reduce RhCl3 impregnated Al2O3 powder at room temperature. The obtained sample was characterized by chemisorption, X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) equipped with an energy dispersion X-ray spectrometer (EDX). XRD and EDX analyses confi…
Two structurally related discogens containing either pyrene (1a) or carbazole (2a) were investigated by thermal, XRD, spectroscopic, and time-of-flight (TOF) methods. Experiments demonstrated for 1a a narrow range Colh phase, which easily forms a glass state at ambient temperature. TOF measurements showed an ambipolar…
Mixed ligand shells stabilising gold nanoparticles have been synthesised using diphenylphosphinine 1 (phosphinine is the phosphorus equivalent of pyridine) and a family of thiol ligands: mercaptoundecanoic acid (2), dodecanethiol (3) and thiophenol (4). Phosphinine 1 and thiols 2 and 3 feature little affinity to one a…
We explain the origin of the electric and particular the magnetic polarizabiltiy of metamaterials employing a fully electromagnetic plasmonic picture. As example we study an U-shaped split-ring resonator based metamaterial at optical frequencies. The relevance of the split-ring resonator orientation relative to the il…
This paper presents lateral growth of carbon nanotube (CNT) between two electrodes and its use as nano temperature sensor. Fabrication of electrodes is made by MEMS techniques. The CNT is grown selectively by microwave plasma chemical vapor deposition between two electrodes. After wire bonding, the grown CNT is tested…
In addition to a cooperative MO6/2 site rotation, orthorhombic AMO3 perovskites with Pbnm space group have a universal, intrinsic MO6/2 site distortion consisting of an orthorhombic component and a reduction from 90° of the O–M–O bond angle α that subtends the octahedral-site edges parallel to the orthorhombic b axis.…
A hydrothermal approach employing an amine as reducing agent enables synthesis of an analogue of the arsenato(iii)-oxovanadate {V(15)As(6)}, representing the first systematic variation of this intensely studied magnetic system.
Effects of the molecular weight and type of chitosans and pH of chitosan solution on antibacterial activity against Salmonella enterica Enteritidis and on internal quality of chitosan-coated eggs were evaluated during 4 wk of storage at 25 degrees C. Two types of chitosans were studied: alpha-chitosans with 4 differen…
Supported Pd clusters catalyze methanol oxidation to methyl formate with high turnover rates and >90% selectivity at near ambient temperatures (313 K). Metal clusters are much more reactive than PdO clusters and rates are inhibited by the reactant O(2). These data suggest that ensembles of Pd metal atoms on surfaces n…
Submicron particles with modified surface were synthesized by a simple one-pot synthesis approach and used as drug carrier for controlled release. Due to the alkalinity of MgO species on the surface, the amount of a model drug, ibuprofen, adsorbed on the modified surface was increased as compared to pure silica SBA-15…
This paper presents a current-transformer (CT) model that is useful for low-frequency applications. To describe the iron-core magnetic behavior, a hysteresis model is proposed, which is able to generate minor asymmetric loops and remanent flux. The effects of classic eddy current losses and anomalous losses are repres…
In this work, a method was developed to prepare monodispersed carboxyl-group functionalized magnetic nanoparticles. Nanosized maghemite (y-Fe2O3, 7.0 ± 1.0 nm) was synthesized using thermal co-precipitation method and subsequently coated with functional groups by one-step suspension copolymerization. The Fourier trans…
Ruthenium-embedded carbon nanofibers were prepared by the processes of stabilization, carbonation, and activation after electrospinning a composite solution of ruthenium(III) acetylacetonate and polyacrylonitrile in N , N -dimethylformamide. When Ru particles were embedded in the carbon nanofibers, the average pore di…
Metallic charge-transfer salts of BEDT-TTF containing both racemic (R/S)- and chiral (S)-sec-phenethyl alcohol as guest molecules have been crystallised and their structures and physical properties are compared.
Electrospinning of biopolymers, such as proteins and polysaccharides, has recently attracted much attention for the fabrication of scaffolds for tissue engineering. In this report, zein/hyaluronic acid (HA) blend fibrous membranes were electrospun and characterized. To facilitate the compatibility of zein and HA, poly…