High sensitive synchrone detection based dynamic Sénarmont method for measurements of electro-optical (EO) Pockels and Kerr coefficients in hybrid nanocomposites films.

This study introduces an innovative approach by employing a highly sensitive synchronous detection-based dynamic Sénarmont method for the precise measurement of electro-optical (EO) Pockels and Kerr coefficients within hybrid nanocomposite films. The experimental setup integrates LabVIEW instrumentation software, ensuring accurate data acquisition. The EO-active film compositions encompass diverse polymer (PMMA) and organic dye combinations, including PMMA/organic dyes (DR1 and CPO), as well as PMMA combined with DR1-SiC, DR1-TiO2, and CPO-TiO2.

Experimental and studies on the structural, magnetic, photocatalytic, and antibacterial properties of Cu-doped ZnO nanoparticles.

Copper-doped ZnO nanoparticles with a dopant concentration varying from 1-7 mol% were synthesized and their structural, magnetic, and photocatalytic properties were studied using XRD, TEM, SQUID magnetometry, EPR, UV-vis spectroscopy, and first-principles methods within the framework of density functional theory (DFT). Structural analysis indicated highly crystalline Cu-doped ZnO nanoparticles with a hexagonal wurtzite structure, irrespective of the dopant concentration. EDX and EPR studies indicated the incorporation of doped Cu ions in the host ZnO lattice.

ZrO/ZnO/TiO Nanocomposite Coatings on Stainless Steel for Improved Corrosion Resistance, Biocompatibility, and Antimicrobial Activity.

The ultrathin nanocomposite coatings made of zirconium oxide (ZrO), zinc oxide (ZnO), and titanium oxide (TiO) on stainless steel (SS) were prepared by the radio frequency sputtering method, and the effects of the nanocomposite coating on corrosion protection and antibacterial activities of nanocomposite coated SS were investigated. Scanning electron microscopy was conducted to observe surface morphology of nanocomposite coatings with distinct distribution of grains with the formation on SS substrate. From the electrochemical impedance spectroscopy results, ZrO/ZnO/TiO nanocomposite coating showed excellent corrosion protection performance at 37 °C during immersion in simulated body fluid and saliva solution for 12 and 4 weeks, respectively.

Electronic and optical competence of TiO/BiVO nanocomposites in the photocatalytic processes.

Nanocomposites with different ratios of titanium dioxide and bismuth vanadate [TiO]/[BiVO] give rise to compatible electronic band structure alignment at their interfaces to ensure enhanced photoactivated charge transfer under visible light. The sol-gel method and suitable post-synthesis thermal treatments were used to synthesize different compositions with stabilized anatase phase of TiO and monoclinic scheelite polymorph BiVO. Structural, electronic and optical characterizations were performed and the results were analysed as a function of the stoichiometry, in which both crystalline structures show a clear junction formation among their characteristic stacking planes.

Investigations of the charge transfer phenomenon at the hybrid dye/BiVO interface under visible radiation.

Photocatalytic hybrid systems were realized by associating bismuth vanadate (BiVO) nanostructured thin films with anchored organic and metal-organic complex molecules. The chosen dyes are based on indoline and azo-based moieties. Optical and photoinduced charge transfer features were investigated experimentally and analysed theoretically through the electron band alignment on the organic/inorganic interface.