Materials Literature
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Amorphous materials—magnesium oxide fluoride with hydroxy groups—of high surface area were prepared for the first time by a soft sol–gel method involving initial fluorination and subsequent hydrolysis of the fluorinated gel. Their structural properties were studied with XRD, FTIR, XPS, and 19F MAS NMR. The magnesium o…
Single-crystalline, submicron-sized Bi2Fe4O9 cubes of reproducible shape have been successfully prepared using a facile, large-scale solid-state reaction employing a molten salt technique in the presence of a nonionic surfactant. The role of surfactant as well as alterations in the molar ratio of Bi3+ to Fe3+ precurso…
Nanocrystalline undoped β Ga 2 O 3 and Dy 3 + -doped β Ga 2 O 3 were prepared through a Pechini-type sol-gel process. All the samples began to crystallize at 600°C, and the crystallinity increased with the increase of annealing temperatures until 1000°C. Field emission-scanning electron microscopy study revealed t…
Abstract Titanium alloys are often used in highly corrosive environments because they are better suited than most other materials. The excellent corrosion resistance is the result of naturally occurring surface oxide films that are stable, uniform, and adherent. This article offers explanations and insights on the mos…
Dendrimers are branched structures and represent a fast growing field covering many areas of chemistry. Various types of dendrimers differing in composition and structure are mentioned, together with their practical use spanning from catalysis, transport vehicles to synthetic vaccines. The main stress is given to pept…
Surface initiated polymer brushes containing phosphate side groups have been used to reversibly switch wettability and hydration between three different states.
Ruthenium oxide was electrochemically prepared onto a carbon nanotube (CNT) film substrate with a three-dimensional nanoporous structure in order to improve the specific capacitance and high-rate capability of ruthenium oxide, a promising electroactive material for supercapacitors. A very thin and uniform deposition o…
We investigated thermal, rheological, morphological and mechanical properties of a binary blend of poly(lactic acid) (PLA) and poly(butylene succinate adipate) (PBSA). The blends were extruded and their molded properties were examined. DSC thermograms of blends indicated that the thermal properties of PLA did not chan…
Institute of Chemical Fibres ul. M.Sklodowskiej-Curie 19/27, 90-570 Łodź, Poland e-mail: kangurek@iwch.lodz.pl Abstract Three types of multi-jet electrospinning heads, series, elliptic and concentric, were constructed in compact forms. Their usefulness for electrospinning was tested with the use of poly(vinyl alcohol)…
Short carbon nanotubes of smaller aspect ratio (say, between 10 and 50) are finding significant application in nanotechnology. This paper studies vibration of such short carbon nanotubes whose higher-order resonant frequencies fall within terahertz range. Because rotary inertia and shear deformation are significant fo…
A cobalt alkoxide, Co(OCH2CH2O), has been prepared from the reaction of cobalt acetate with ethanediol. This compound crystallizes as disk-shaped particles with diameter and thickness in the 0.4–1 µm and 100–250 nm ranges, respectively. Structural characterization (X-ray and electron diffraction) shows a layered arran…
A novel kind of electrode material, rod-shaped , was synthesized under high viscosity for the first time. The was proved to be the multicrystal with the mixture of α- and by X-ray diffraction. From transmission electron micoscopy, it could be seen that the sample has a length of and a diameter of . The ratio of length…
Abstract Aqueous suspensions of nanocrystals can be obtained by acid hydrolysis of native waxy maize starch granules. The disruption of waxy maize starch granules by 2.2N HCl hydrolysis has been followed by scanning and transmission electron microscopy and laser granulometry. The mechanical properties of composite mat…
Water-soluble CdSe/ZnS (core-shell) semiconductor quantum dots surface-modified with tetrahexyl ether derivatives of p-sulfonatocalix[4]arene were synthesized for the optical detection of the neurotransmitter acetylcholine.
Chemical transformation of single-wall carbon nanotubes (SWNT), edge-terminated with carboxylic groups, to SWNT species with amino groups directly attached to the tube open ends has been performed. Different synthetic approaches have been investigated. The reaction products were characterised by FTIR, Raman spectrosco…
Chemical coupling of maleated polyethylene (MAPE) copolymers at the interface in wood-fiber/high-density-polyethylene (HDPE) composites was investigated in this study. FTIR and ESCA analyses presented the evidence of a chemical bridge between the wood fiber and polymeric matrix through esterification. The feature peak…
The compressive response of a NiTi shape-memory alloy is investigated at various strain rates using UCSD’s modified 12-in. Hopkinson pressure bar and a conventional Instron machine. To obtain a constant strain rate during the formation of a stress-induced martensite in a Hopkinson test, a copper tube of suitable dimen…
Over the last decade, interest in the simulation of micro- and nano-scale heat transfer has lead to the development of a variety of models and numer-ical methods for phonon transport in semiconductors and dielectrics. These models span direct simulation using molecular dynamics, a range of mod-els of varying fidelity…
High-temperature electrochemical devices operate via an ion gradient that develops across a solid electrolyte. Consequently, hermeticity across this membrane is paramount. Not only must the electrolyte contain no interconnected porosity, but it must be connected to device chassis with a gas-tight seal. Here we report…
We present results of the first systematic study of the hydrothermal synthesis of the manganites La0.5M0.5MnO3 (M = Ca, Sr, Ba), and a detailed characterisation of the products using a number of experimental methods. All three materials can be produced as phase-pure, polycrystalline powders in one step from solutions…