Materials Literature
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Nearly all metals and their alloys are subject to corrosion that causes them to lose their structural integrity or other critical functionality. It is essential to detect corrosion when it occurs, and preferably at its early stage, so that action can be taken to avoid structural damage or loss of function. Protective…
A phase-transfer reaction allows a facile synthesis of uniform In0 particles, 10−15 nm in size. This two-step synthesis also results in a facile separation of as-prepared In0 as well as a sufficient colloidal and chemical stabilization of the less-noble metal.
The orbital occupation, which is the centerpiece of both self-interaction and several metal-insulator transition analyses, as well as of the local density or generalized gradient approximation with a Hubbard term, is not well defined, in the sense that it is partially ambiguous. A general treatment can be applied to b…
Highly uniform composite nanofibers composed of well-oriented single-walled carbon nanotubes (SWCNTs) wrapped in a conducting polymer have been fabricated using electrospinning. Water-soluble polyaniline (WS-PANI) was used as a conducting material to improve the processability during electrospinning. The WS-PANI forme…
We report measurements of the anisotropic magnetoresistance (AMR) of epitaxial thin film and polycrystalline samples of La0.65Ca0.35MnO3. Near the metal-insulator transition (MIT) temperature the AMR of both polycrystalline and thin film samples exhibit a peak. However at temperatures well below the MIT, the AMR of th…
Abstract Size is not all! Investigation of the controlled release of tertiary alcohols from the surface of dendrimers and “stylomers” as polymer model systems (see scheme) showed that the polarity of the conjugates and structural modifications in close proximity to the release unit have a stronger influence on the rat…
Abstract Acrylonitrile butadiene rubber (NBR) foams compounded with various halogen‐free flame retardants were prepared. The influence of nonhalogen flame retardants on the flame resistance and foaming properties of the NBR compounds were investigated. The foaming properties (expandability 980%–1050%, closed‐cell stru…
Abstract The isothermal crystallization of poly(phenylene sulfide) (PPS) and its glass fiber (GF) reinforced composite has been investigated by differential scanning calorimetry (DSC) and polarized optical microscope (POM) equipped with a hot stage. During the isothermal crystallization process of PPS the Avrami expon…
An alkaline-developable, chemically amplified, negative-type, photosensitive poly(benzoxazole) (PSPBO) based on poly( o -hydroxy amide) (PHA), an active ester-type cross-linker bis( p -nitrophenyl) suberoylate (BNPS), and N -{[(4,5-dimethoxy-2-nitrobenzyl)oxy]carbonyl}-2,6-dimethylpiperidine (DNCDP) as a photobase gen…
Vanadium dioxide (VO(2)) undergoes a reversible metal-insulator transition, normally at approximately 68 degrees C. While the properties of continuous semi-transparent coatings of VO(2) are well known, there is far less information available concerning the potential use of discrete VO(2) nanoparticles as a thermochrom…
Abstract Five different homoleptic gallium complexes with malonic diester anions [Ga(ROCOCHOCOR) 3 ] [R = Me ( 1 ), Et ( 2 ), i Pr ( 3 ), t Bu ( 4 ) and SiMe 3 ( 5 )] have been synthesised and characterised by 1 H and 13 C NMR, IR spectroscopy, electron ionisation mass spectrometry (EI‐MS), and single‐crystal X‐ray di…
Abstract The many faces of crystals : Silica mesoporous crystals were synthesized by using a co‐structure directing method. Structural defects in the crystals with Fd $\bar 3$ m symmetry—described as tetrahedrally close‐packed and consisting of 5 12 and 5 12 6 4 polyhedra—were found (see figure). These defects were ex…
ZnO recently receives extensive interest owing to its potential applications in the dilute magnetic semiconductor. In this work, Al was deposited onto the surface of ZnO film followed by high vacuum annealing. The film showed the room temperature ferromagnetism (RTF). The saturation magnetization (Ms) highly depends o…
Amorphous calcium carbonate (ACC) plays important roles in biomineralization, and its synthesis in vitro has been of keen interest in the field of biomimetic materials. In this report, we describe the synthesis of ACC films using a novel acid polysaccharide, maleic chitosan, as an additive. We prepared the films by di…
X-ray fluorescence (XRF) measurements on solutions or crystals of biological macromolecules provide additional information that can be used in structure determination and/or refinement protocols. Here details are presented of an experimental setup, employed on all the ESRF Macromolecular Crystallography Group beamline…
The aim of this study was to evaluate the safety and tissue compatibility of an injectable biodegradable poly(ester-anhydride) copolymer of ricinoleic acid (RA) and sebacic acid (SA) in rats. The absorbable biomaterial containing 70% w/w of RA and 30% w/w of SA [P(SA-RA) 3:7] was implanted in rats in two separate stud…
In this Letter, we calculate the density of states of graphene under a highly uniform magnetic field and white-noise random potential. We discover that the disorder-broadened zero-energy Landau band has a Gaussian shape and its width is proportional to the random potential variance and the square root of magnetic fiel…
A method to determine the thickness of a nonabsorbing thin film on an absorbing substrate is presented. A linear relation between the thin-film thickness and the tangent wavelength of the reflectance spectrum for a specific interference order is revealed, which permits the calculation of the thickness provided that th…
This paper reports the accurate measurement of the ReO 3 cell parameter as a function of temperature. The thermal expansion is confirmed to be negative over most of the temperature range from 5 to 300 K. The main problems with the measurements are the very small variations (in the range of 10 −5 Å) in the cell paramet…
Abstract A comparative study of ethylene vinyl acetate nanocomposites based on expanded graphite, multiwalled carbon nanotubes, and carbon nanofibers has been carried out to investigate the effect of different carbon nanofillers on the electrical properties of the corresponding composites. The composites were prepared…