Observation of excellent photocatalytic and antibacterial activity of Ag doped ZnO nanoparticles.

Nanotechnology is the platform with the greatest promise for scientific advancements. One of the advancement is improvement in photocatalytic and antibacterial performance. This work was undertaken to synthesize un-doped and silver (Ag) doped zinc oxide (ZnO) nanoparticles (NPs) using an inexpensive wet chemical method and to investigate the structural and optical properties, photocatalytic and antibacterial activity.

Coexistence of ferromagnetic-antiferromagnetic ground state, exchange bias effect and bandgap narrowing in Cr-doped ZnO nanocrystals derived by simple chemical method.

A detailed investigation of the structural, optical and magnetic properties of Cr-doped ZnO nanostructures obtained a simple chemical method has been carried out. The structural study using X-ray powder diffraction indicates the hexagonal wurtzite structure for undoped ZnO and ZnO doped with 1% Cr, whereas the appearance of a secondary cubic phase (ZnCrO) is witnessed with the incorporation of Cr content ≥3% in the ZnO compounds. Furthermore, the secondary phase is observed to increase systematically with the increase of the Cr concentration.

Structural, optical and magnetic properties of pure and 3d metal dopant-incorporated SnO nanoparticles.

Dilute magnetic oxide semiconductors doped with transition metals have attracted significant attention both theoretically and experimentally due to their interesting and debatable magnetic behavior. In this work, we investigated the influence of Fe, Co and Ni doping on the structural, optical and magnetic properties of SnO nanoparticles, which were produced a simple sol-gel technique. Raman spectroscopy, XRD, XPS, TEM, FT-IR characterizations were performed to study the crystal structure and morphology of the pure and doped nanoparticles, which confirmed the tetragonal rutile structure of the SnO nanoparticles.

Ultra-bright emission from Sr doped TiO nanoparticles through r-GO conjugation.

Graphene and semiconductor nanocomposite garnered much interest in nanoscience and nanotechnology. In this research, TiO, TiO: Sr and TiO: Sr/r-GO (reduced graphene oxide) nanocomposites have been successfully synthesized via a wet chemical synthesis method. The microscopic studies confirmed the formation of graphene sheets which looked like a paper which could easily wrap over the bacterial surface killing them.

Defect mediated mechanism in undoped, Cu and Zn-doped TiO nanocrystals for tailoring the band gap and magnetic properties.

Oxide based dilute magnetic semiconductor materials have been of great interest over the years due to their potential use in spintronic devices. However, the variations in the magnetic behavior of the materials have raised concerns regarding the origin of ferromagnetic properties which still needs to be explored. Manipulation of magnetic behavior in oxide based dilute magnetic semiconductors has become a challenge due to the interplay of intrinsic defects present in the material.

Structural and magnetic study of undoped and cobalt doped TiO nanoparticles.

The present study investigates the influence of cobalt doping on the structural and magnetic properties of TiO nanoparticles prepared by a simple wet chemical method. The single phase anatase structure of Co-doped TiO nanoparticles was confirmed by X-ray powder diffraction. A morphological study using scanning electron microscopy and transmission electron microscopy indicates the formation of TiO nanoparticles of sizes 6-10 nm.