Materials Literature
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Nd-Fe-B permanent magnets doped with a small amount of praseodymium (Pr) nanoparticles were prepared by conventional sintering method. Effects of the Pr nanoparticles doping amount and the sintering temperature on the magnetic properties of the magnets were studied. As the doping amount increases, the coercivity of th…
A simplified theory of telescopic oscillations in multi-walled carbon nanotubes is developed. Explicit expressions are derived for the telescopic force constants (longitudinal rigidity) and the frequencies of telescopic oscillations. The contribution of small-amplitude telescopic oscillations to the low-temperature sp…
The macro- and microstructure have been analyzed and the tensile mechanical properties have been measured for commercial titanium subjected to dynamic channel angular pressing (DCAP) at high temperatures using one or two passes, as well as to additional warm rolling and low-temperature annealing. The structure of tita…
Abstract In this study, wear characteristics of titanium and titanium alloyed materials produced with mechanical alloying/milling (MA/MM) method were studied. In production of titanium and titanium alloyed materials, sponge titanium, gas atomised titanium powder and pre-alloyed Ti6Al4V alloy powder were used. The prod…
Two-component colloidal nanosheets were prepared in Ti 0.91 O 2 −MnO 2, Ca 2 Nb 3 O 10 −Ti 0.91 O 2, and Ca 2 Nb 3 O 10 −MnO 2 systems with various compositions, and were flocculated by adding K ions. X-ray powder diffraction patterns of the products showed remarkably broad reflections, and powder pattern simulation w…
A series of new spin-labeled porphyrin containing isoindoline nitroxide moieties were synthesized and characterized as potential free radical fluorescence sensors. Fluorescence-suppression was observed in the free-base monoradical porphyrins, whilst the free-base biradical porphyrins exhibited highly suppressed fluore…
The reconstruction of inelastic scattering cross sections faces two problems: the measured signal (energy spectrum) is a multiple scattering signal; the inelastic energy loss is nonuniform over the target depth. In this paper, we present a method for numerical reconstruction of cross sections from characteristic energ…
In this study organically modified nanoclay were prepared by exchanging of the cetyltrimethylammonium (CTAB), with inorganic/metal ions/cations in montmorillonite structure. To investigate the influence of the amount of modifier on basal spacing and subsequent removal efficiency of hydrocarbon, different amount of mod…
The rice floral glume (husk) and its processing products were studied using X-ray photoelectron spectroscopy. We established that the rice husk contained silica in two non-equivalent forms in 1:3 ratio. The predominating form is silicon dioxide, while the minor component contains the silicon bound with the organic com…
Ab initio density functional calculations, transmission electron microscope, and x-ray diffraction (XRD) were used to study the dominant factor of increased coercivity for the doping effect in SmCo7−xZrx (x = 0 to 0.3). Simulated values of saturated magnetization are 940 emu/cm3 for SmCo7 and 799 emu/cm3 for SmCo6.7Zr…
The composition and magnetic properties of the powders extracted from CoFe 2 O 4 aqueous suspensions and the CoFe 2 O 4 /PVA (PVA is polyvinyl alcohol) nanocomposites with a cobalt ferrite content of 10–30 wt % have been investigated using Mössbauer spectroscopy, transmission electron microscopy, and vibration magneto…
The structure and magnetic properties were studied for ternary Tb-Fe-B melt-spun ribbons with nominal composition of Tb14Fe86–xBx (x = 5.2–6.8). Effect of boron content and melt-spun wheel speed on the coercivity of the ribbons was investigated. With the increase of boron content, the coercivity of the Tb-Fe-B ribbons…
The study comprised of the investigation into the sensitization \ncharacteristics of AISI 409 titanium stabilized ferritic stainless steel \nduring low heat input welding. AISI 409 is a fully ferritic stainless \nsteel used in catalytic converters and tubing for automotive exhaust \nsystems due to the…
Abstract We demonstrated the excellent biocompatibility of dendritic platinum nanoparticles (DPNs) in vitro using a cancer cell line (BT-20) and MTT assay. In addition, a successful observation of DPNs within live cells using differential interference contrast (DIC) microscopy without labelling fluorescent dyes has be…
An advanced organic polymer material of k = 2.2 has been successfully integrated in Cu lines with dielectric spacing from 80 to 20 nm. Cu lines with both TaN/Ta barrier and no barrier were fabricated. Current–voltage ( I – V ) and time dependent dielectric breakdown (TDDB) measurements were performed to study the scal…
Nano- and microscale technologies have made a marked impact on the development of drug delivery systems. The loading efficiency and particle size of nano/micro particles can be better controlled with these new technologies than conventional methods. Moreover, drug delivery systems are moving from simple particles to s…
Metal waste form (MWF) alloy of D9 stainless steel with 8·5 wt-% zirconium was cast and evaluated for the corrosion behaviour. The microstructure, phase analysis, corrosion resistance and passive film properties of the alloy were evaluated using scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray…
Using a transient thermoreflectance (TTR) technique, several Au films with different thicknesses on glass and SiC substrates are measured for thermal characterization of metallic nano-films, including the electron-phonon coupling factor G , interfacial thermal resistance R , and thermal conductivity K s of the substra…
(K,Na)NbO 3 (KNN) films with high transverse piezoelectric coefficients were successfully deposited onto Pt/Ti/SiO 2 /Si substrates by RF magnetron sputtering. These films were polycrystalline and had pseudo-cubic perovskite structures with preferential <001 > orientation. To improve their piezoelectric properties, we…
It was shown recently that ibuprofen revealed a strong tendency to form hydrogen bonded aggregates such as dimers and trimers of either cyclic or linear geometry, which somehow seems to control molecular mobility of that drug [Brás et al. J. Phys. Chem. B2008, 112 (35), 11 087-11 099]. For such hydrogen-bonded liquids…