Materials Literature
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The present investigation aims to develop thermally stable electromagnetic interference shielding materials from polysulfone (PSU) nanocomposites filled with multiwall carbon nanotubes (MWCNT) or carbon nanofibers (CNF). The effect of filler type and their structural features such as aspect ratio (length/diameter) and…
We study the influence of silicon dangling bonds on germanium thermal diffusion within silicon oxide and fused silica substrates heated to high temperatures. By using scanning electron microscopy and Rutherford backscattering spectroscopy, we determine that the lower mobility of Ge found within SiO2/Si films can be as…
Spherical zinc particles ranging in average size from 275 to 760 nm and covered with platelike zinc oxide particles on the order of 10 nm in size have been prepared by levitation-jet aerosol synthesis through condensation of zinc vapor in an inert-gas flow. The nanoparticles have been characterized by transmission ele…
Size dependence of magnetic properties of Sm 0.43 Ca 0.57 MnO 3 nanoparticles with average size of 15–60 nm has been investigated. Charge ordering, characteristic for the bulk form of this material, was found to be gradually suppressed with decreasing particle size and fully disappearing in 15 nm nanoparticles. Onsets…
Liposomes are commonly used to deliver drugs and contrast agents to their target site in a controlled manner. One of the greatest obstacles in the performance of such delivery vehicles is their stability in the presence of serum. Here, we demonstrate a method to stabilize a class of liposomes that load gadolinium, a m…
Acetate kinase (ACK) (EC no: 2.7.2.1) interconverts acetyl-phosphate and acetate to either catabolize or synthesize acetyl-CoA dependent on the metabolic requirement. Among all ACK entries available in UniProt, we found that around 45% are multiple ACKs in some organisms including more than 300 species but surprisingl…
An analysis is given of the effect of different beam and detector parameters on the sharpness of recorded diffraction features for macromolecular crystals of different quality. The crystal quality parameters include crystal strain, crystal or mosaic block size and mosaic block misorientation. Calculations are given fo…
Abstract Split Hopkinson pressure bar test system was used to investigate the plastic deformation behavior and dynamic response character of α‐type Ti–5Al–2.5Sn ELI and near α‐type Ti–8Al–1Mo–1V titanium alloy when subjected to dynamic loading. In the present work, stress–strain curves at strain rate from 1.5 × 10 3 t…
A five‐layer stack of lead zirconate titanate ( PZT ) thin films with Pt electrodes was fabricated for potential applications in nanoactuator systems. The 1 μm thick PZT films were deposited by a sol–gel technique, the platinum electrodes by sputtering. The PZT films were crack‐free, in spite of the use of silicon as…
Abstract The goal of this work was to fabricate a composite based on Ce 0.9 Gd 0.1 O 1.95 (CGO) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3–δ (LSCF) as a porous and thin oxygen electrode film adherent to (ZrO 2 ) 0.92 (Y 2 O 3 ) 0.08 (YSZ) substrate by electrostatic spray deposition in order to improve durability in solid oxi…
Two dimethyldioctadecylammonium (DODA+) salts of a new keplerate with the general formula [Mo132O312S60(SO4)x(H2O)132–2x](12 + 2x)− and abbreviated DODAn−Mo132S60 (n = 44, 56) were synthesised and characterised. Both clusters were fully characterised by the combination of Polarised Optical Microscopy, Differential Sca…
ABSTRACT The mechanical properties and inflammability of polyamide 6 (PA6) nanocomposites incorporated with Montmorillonite organoclay (MMT) modified with thermal stable ionic liquid surfactants were investigated. The compatibility between ionic liquid‐treated MMT and PA6 matrix was improved and the intercalation morp…
The first floristic inventory of benthic diatoms is provided for the Bahia Magdalena-Bahia Almejas lagoon system. Samplings were carried out during November of 1999. The oxydized samples were mounted permanently. Eighty six diatom taxa were identified, out of which 59 are new records for the Bahia Magdalena area, and…
Magneto-optical properties of single crystal of Ni50.1Mn28.4Ga21.5 magnetic shape memory alloy in martensite and austenite phase were systematically studied. Crystal orientation was approximately along {100} planes of parent cubic austenite. At room temperature, the sample was in modulated 10M martensite phase and tra…
We have done a study of graphene/hexagonal boron nitride ($h$-BN) thin films within the framework of density functional theory, and find that the interlayer interaction energy of a graphene/$h$-BN monolayer thin film is inversely proportional to the layer number. This analysis based on a method which simulates the int…
The use of negative-index materials is highly efficient for tailoring the spectral dispersion properties of a quarter-wavelength Bragg mirror and for obtaining resonant behavior of a multilayer Fabry-Perot cavity over a very large spectral range. An optimization method is proposed and validated on some first promising…
The triterpenes α- and β-amyrins display important pharmacological activities. As a result of their high hydrophobia, they present low water solubility and reflect poor oral bioavailability. Different techniques can be used for the improvement of amyrins solubility, one of them is the use of nanoemulsions. Therefore,…
We demonstrate here a simple and effective approach for fabricating surface-enhanced Raman spectroscopy substrates by hybridizing Au films with silver particle clusters. A trace amount of aqueous chemical is dropped on the Au film covered substrate, followed by the addition of colloidal Ag nanoparticles (Ag NPs). The…
Abstract Based on a hydrothermal method, the Ce 3+ /Tb 3+ co‐doped BaGdF 5 nanocrystals were synthesized by controlling the introduction concentration of Ba 2+ and Gd 3+ . The samples were characterized by X‐ray diffraction (XRD), field emission scanning electron microscopy (FE‐SEM) images, photoluminescence (PL) exci…
Using current-voltage measurements at varied temperature, incident light intensity, and illumination wavelength, we have determined the energy level spectrum of a multiply charged cluster of manganese atoms in silicon. The results demonstrate that such clusters produce a whole spectrum of energy levels in the interval…