Nano Research & Applications

Multiple Doping (Ag+Fe+La) Induced Altering of the Magnetic and Antibacterial Properties of Zno Nano Powders

In the current scenario, undoped, Ag (2 at. %), Ag + Fe (2 at. %) and Ag + Fe+ La (2 at. %) doped ZnO Nano powders were fabricated using combustion method and their basic properties were characterized. The doped samples exhibit better ferromagnetic behavior in the case of magnetic studies. The grain size of the pristine ZnO is around 200 nm and the size reduces drastically at one order of magnitude (from 200 nm to 22 nm) after doping in the surface morphological studies. The gradual decrease in the crystallite size is significantly due to the zener pinning effect as confirmed by structural studies. The antibacterial efficiency of the synthesized samples is examined against three different bacteria specifically Staphylococcus aureus, Bacillus subtilis (Gram Positive) and Shigella flexneri (Gram Negative), testified that the antibacterial efficacy of ZnO sample increases rapidly after doping. As a consequence, the doped and undoped ZnO Nano powders exhibit better efficiency against S. flexneri than S. aureus and B. subtilis. The optical quality of the semiconductor material is reported by photoluminescence (PL) studies.

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