Materials Literature
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ABSTRACT Chemical vapour deposition (CVD) had been used to produce carbon nanotube (CNT) coated carbon fibre, referred to in this work as nano‐hybrid fibres. In order to understand the gas flow behaviour inside the CVD reactor, computational fluid dynamics (CFD) has been utilised to simulate the process in a horizonta…
Tb0.3Dy0.7Fe2/Pt/PbZr0.56Ti0.44O3 (Terfenol-D/Pt/PZT) thin films were sputtered on Pt/TiO2/SiO2/Si substrate. PZT and Terfenol-D layers were chosen for their large piezoelectric and magnetostrictive coefficients, respectively. 4%–5% magnetocapacitance has been measured on a Terfenol-D/Pt/PZT stack at room temperature.…
Although localized atomic 2p orbitals have been taken as the possible origin of d0 materials, the collective magnetic ordering is impeded by the low concentration of local magnetic moments. Using first-principles calculations with wurtzite GaN as a prototype material, we predict that the delocalized defect orbitals ca…
Medical-grade polyvinyl chloride was modified by incorporation of silver nitrate in a concentration range from 0 to 5 wt.% using a solvent casting technique. Agar diffusion test was performed to evaluate in-vitro antimicrobial properties of prepared samples. The obtained systems were characterized by tensile test, X-r…
A study of the addition of nucleophilic reagents that are also strong Brønsted bases (Et 3 N, pyridine, quinuclidine, MeO – ) to n Bu 4 P + [PtBr 3 (C 2 H 4 )] − ( 1 ) and trans -[PtBr 2 (NHEt 2 )(C 2 H 4 )] ( 7 ) has provided key information on the deactivation of the hydroamination PtBr 2 /Br – catalyst, leading to…
BACKGROUND: Multimodal contrast agents usually containing two or more signal components can be used for several imaging modalities. Thus, complimentary information can be obtained by using just one kind of contrast agents. PURPOSE: To investigate the potential of superparamagnetic perfluorooctylbromide nanoparticles (…
An amperometric cholesterol biosensor was fabricated using polyaniline-coated polyester films. Polyaniline was dissolved in chloroform with camphorsulfonic acid, and polystyrene was added to this solution. Using this mixed solution, the coating was placed onto polyester films. Cholesterol oxidase was immobilized onto…
Magnesium – nickel alloys have been considered an alternative for AB5 and AB2-type alloys in nickel–metal hydride batteries due to their larger maximum discharge capacities, but their low stability in alkaline solution has hindered their use in commercial cells. Aiming to improve the electrode performance of the Mg55N…
Anodizing of aluminium alloys is often used to improve appearance, corrosion resistance or adhesion with organic coatings, with properties of the oxides tailored by controlling the anodizing conditions. Some electrolytes can be used in relatively wide ranges of concentration, temperature and potential or current, whil…
Three new 'short' metallacycles are selectively obtained from the reaction of a bimetallic Cu(I) 'U-shape' molecular clip with, respectively, the cyano CN(-), tricyanomethanide C(CN)(3)(-), and azido N(3)(-) pseudohalogenide ions. These supramolecular assemblies have been characterized by spectroscopic methods, single…
Manipulating and controlling water-based aqueous solutions with the use of virtual walls is relatively simple compared to that of nonaqueous low-surface-tension liquids, which pose greater challenges to microfluidic devices. This letter reports a novel technique to form a virtual wall for various low-surface-tension l…
In this work, a biodegradable polymer composite was prepared by mixing poly(ethylene succinate- co -5.1 mol % ethylene adipate) (PESA) and octavinyl-polyhedral oligomeric silsesquioxanes (ovi-POSS) at a very low ovi-POSS loading. It is found that a fine dispersion of ovi-POSS has been achieved in the PESA matrix. The…
Reducing the phonon thermal conductivity of electrically conducting polymers can facilitate their use as potential thermoelectric materials. Thus, the influence of the coupling between the longitudinal and transverse phonon modes on overall thermal conductivity is explored for binary mixtures of polyaniline (PANI) and…
Abstract Two mononuclear spin‐crossover compounds Fe( L 1 ) 2 ( 1 ) and Fe( L 2 ) 2 ( 2 ) {H L 1 = 2‐hydroxy‐3‐methyl‐ N′ ‐[1‐(pyridine‐2‐yl)butylidene]benzohydrazide, H L 2 = 2‐hydroxy‐ N′ ‐[1‐(pyridine‐2‐yl)butylidene]benzohydrazide} were successfully synthesized. The magnetic measurements of the compounds revealed…
We present x-ray, neutron scattering, and heat capacity data that reveal a coupled first-order magnetic and structural phase transition of the metastable mixed-valence postspinel compound Mn${}_{3}$O${}_{4}$ at 210 K. Powder neutron diffraction measurements reveal a magnetic structure in which Mn${}^{3+}$ spins align…
The Diels-Alder reaction was used to yield thermal reversibility of the bonding between a partially furan-functionalized epoxy thermosetting matrix and a maleimide-treated glass fiber. Under ambient temperature conditions, the covalent bond forming product reaction dominates, but this reaction reverses at elevated tem…
Poly(vinyl chloride) (PVC)/halloysite nanotubes (HNTs) nanocomposites were prepared by melt blending. Transmission electron microscopy (TEM) results showed that HNTs were uniformly dispersed in the PVC matrix. The thermal properties of PVC/HNTs nanocomposites were investigated in detail. The apparent activation energi…
The electromechanical actuation of a highly ordered compound of graphene oxide (GO) is shown via ab initio simulations to produce high-performance quantum-mechanical responses, which mimic the behaviour of mammalian skeletal muscle. In addition to large expansive strains (∼10%), this GO compound (asymmetrically unzipp…
BaTiO3–ferrite multiphase composites were prepared starting from di-phase mixtures of α-Fe2O3 and BaTiO3 powders. During the sintering step, the formation of small amounts of secondary phases with multifunctional character as BaFe12O19 or Ba12Ti28Fe15O84 was promoted. The resulting multiphase ceramic compounds show in…
Mesoporous germanium (Ge) is a new nanostructured material with a very high potential for numerous applications. Thermally induced structural evolution of this nanomaterial is a key point for many high-temperature processes, such as epitaxy, for example, in which it can be involved. In this work, we investigate these…