Ce-doped MgO films on AZ31 alloy substrate for biomedical applications: preparation, characterization and testing.

Magnesium ions, MgO nanoparticles and thin films, magnesium alloys and cerium compounds are materials intensively studied due to their corrosion protection, antibacterial and pharmacological properties. In this work, we have designed, prepared and investigated, novel thin films of MgO doped with cerium, deposited on Mg alloy (AZ31) for temporary implants, in order to enhance their life time. More precisely, we report on microstructure and corrosion behavior of MgO pure and doped with 0.

Lead-Free BNT-BT/CoFeO Core-Shell Nanostructures with Potential Multifunctional Applications.

Herein we report on novel multiferroic core-shell nanostructures of cobalt ferrite (CoFeO)-bismuth, sodium titanate doped with barium titanate (BNT-BT), prepared by a two-step wet chemical procedure, using the sol-gel technique. The fraction of CoFeO was varied from 1:0.5 to 1:1.

Probing the dielectric, piezoelectric and magnetic behavior of CoFeO/BNT-BT composite thin film fabricated by sol-gel and spin-coating methods.

We investigated in this paper a novel bilayer composite obtained by sol-gel and spin coating of the ferroelectric 0.92NaBiTiO-0.08BaTiO (abbreviated as BNT-BT) and ferromagnetic CoFeO phases, for miniature low-frequency magnetic sensors and piezoelectric sensors.

Combined use of Mössbauer spectroscopy, XPS, HRTEM, dielectric and anelastic spectroscopy for estimating incipient phase separation in lead titanate-based multiferroics.

The formation of separate phases in crystalline materials is promoted by doping with elements with different valences and ionic radii. Control of the formation of separate phases in multiferroics is extremely important for their magnetic, ferroelectric and elastic properties, which are relevant for multifunctional applications. The ordering of dopants and incipient phase separation were studied in lead titanate-based multiferroics with the formula (Pb0.

Development and Biocompatibility Evaluation of Photocatalytic TiO₂/Reduced Graphene Oxide-Based Nanoparticles Designed for Self-Cleaning Purposes.

Graphene is widely used in nanotechnologies to amplify the photocatalytic activity of TiO₂, but the development of TiO₂/graphene composites imposes the assessment of their risk to human and environmental health. Therefore, reduced graphene oxide was decorated with two types of TiO₂ particles co-doped with 1% iron and nitrogen, one of them being obtained by a simultaneous precipitation of Ti and Fe ions to achieve their uniform distribution, and the other one after a sequential precipitation of these two cations for a higher concentration of iron on the surface. Physico-chemical characterization, photocatalytic efficiency evaluation, antimicrobial analysis and biocompatibility assessment were performed for these TiO₂-based composites.

Characterization of fine grain Ba0.995Y0.005TiO3 ceramics obtained from gel-precursor nanopowder.

Using an acetate-alkoxide sol-gel route in which the precursors are barium acetate, yttrium isopropoxide and titanium diisopropoxide bis-acetylacetonate, we prepared a ferroelectric material with the formula: Ba1-xYxTiO3, x = 0.005. SEM analysis showed a polymeric microstructure of the gel due to the chelated titanium alkoxide precursor used as starting materials.